xarray CfRadial1 backend

In this example, we read CfRadial1 data files using the xradar cfradial1 backend.

Data is also exported to ODIM_H5 and CfRadial2.

import wradlib as wrl
import wradlib_data
import warnings
from IPython.display import display

import matplotlib.pyplot as plt
import numpy as np
import xradar as xd
import xarray as xr

warnings.filterwarnings("ignore")

Load CfRadial1 Volume Data

We use the functionality provided now by xradar to read the CfRadial1 data into a DataTree.

fpath = "netcdf/cfrad.20080604_002217_000_SPOL_v36_SUR.nc"
f = wradlib_data.DATASETS.fetch(fpath)
vol = xd.io.open_cfradial1_datatree(f)

Downloading file 'netcdf/cfrad.20080604_002217_000_SPOL_v36_SUR.nc' from 'https://github.com/wradlib/wradlib-data/raw/main/data/netcdf/cfrad.20080604_002217_000_SPOL_v36_SUR.nc' to '/home/docs/.cache/wradlib-data'.

Inspect RadarVolume

display(vol)

<xarray.DataTree>
Group: /
│   Dimensions:              (sweep: 9)
│   Coordinates:
│       latitude             float64 8B ...
│       longitude            float64 8B ...
│       altitude             float64 8B ...
│   Dimensions without coordinates: sweep
│   Data variables:
│       volume_number        int32 4B ...
│       platform_type        |S32 32B ...
│       primary_axis         |S32 32B ...
│       status_str           |S1 1B ...
│       instrument_type      |S32 32B ...
│       time_coverage_start  |S32 32B ...
│       time_coverage_end    |S32 32B ...
│       sweep_group_name     (sweep) <U7 252B 'sweep_0' 'sweep_1' ... 'sweep_8'
│       sweep_fixed_angle    (sweep) float32 36B ...
│   Attributes: (12/13)
│       Conventions:         CF/Radial instrument_parameters radar_parameters rad...
│       version:             1.2
│       title:               TIMREX
│       institution:         
│       references:          
│       source:              
│       ...                  ...
│       comment:             
│       instrument_name:     SPOLRVP8
│       site_name:           
│       scan_name:           
│       scan_id:             0
│       platform_is_mobile:  false
├── Group: /sweep_0
│       Dimensions:                    (azimuth: 483, range: 996)
│       Coordinates:
│         * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
│           elevation                  (azimuth) float32 2kB ...
│           time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:15:...
│         * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
│       Data variables: (12/18)
│           sweep_number               int32 4B ...
│           sweep_mode                 <U20 80B 'azimuth_surveillance'
│           prt_mode                   |S32 32B ...
│           follow_mode                |S32 32B ...
│           sweep_fixed_angle          float32 4B ...
│           pulse_width                (azimuth) float32 2kB ...
│           ...                         ...
│           r_calib_index              (azimuth) int8 483B ...
│           measured_transmit_power_h  (azimuth) float32 2kB ...
│           measured_transmit_power_v  (azimuth) float32 2kB ...
│           scan_rate                  (azimuth) float32 2kB ...
│           DBZ                        (azimuth, range) float32 2MB ...
│           VR                         (azimuth, range) float32 2MB ...
├── Group: /sweep_1
│       Dimensions:                    (azimuth: 483, range: 996)
│       Coordinates:
│         * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
│           elevation                  (azimuth) float32 2kB ...
│           time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:16:...
│         * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
│       Data variables: (12/18)
│           sweep_number               int32 4B ...
│           sweep_mode                 <U20 80B 'azimuth_surveillance'
│           prt_mode                   |S32 32B ...
│           follow_mode                |S32 32B ...
│           sweep_fixed_angle          float32 4B ...
│           pulse_width                (azimuth) float32 2kB ...
│           ...                         ...
│           r_calib_index              (azimuth) int8 483B ...
│           measured_transmit_power_h  (azimuth) float32 2kB ...
│           measured_transmit_power_v  (azimuth) float32 2kB ...
│           scan_rate                  (azimuth) float32 2kB ...
│           DBZ                        (azimuth, range) float32 2MB ...
│           VR                         (azimuth, range) float32 2MB ...
├── Group: /sweep_2
│       Dimensions:                    (azimuth: 482, range: 996)
│       Coordinates:
│         * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
│           elevation                  (azimuth) float32 2kB ...
│           time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:17:...
│         * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
│       Data variables: (12/18)
│           sweep_number               int32 4B ...
│           sweep_mode                 <U20 80B 'azimuth_surveillance'
│           prt_mode                   |S32 32B ...
│           follow_mode                |S32 32B ...
│           sweep_fixed_angle          float32 4B ...
│           pulse_width                (azimuth) float32 2kB ...
│           ...                         ...
│           r_calib_index              (azimuth) int8 482B ...
│           measured_transmit_power_h  (azimuth) float32 2kB ...
│           measured_transmit_power_v  (azimuth) float32 2kB ...
│           scan_rate                  (azimuth) float32 2kB ...
│           DBZ                        (azimuth, range) float32 2MB ...
│           VR                         (azimuth, range) float32 2MB ...
├── Group: /sweep_3
│       Dimensions:                    (azimuth: 483, range: 996)
│       Coordinates:
│         * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
│           elevation                  (azimuth) float32 2kB ...
│           time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:17:...
│         * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
│       Data variables: (12/18)
│           sweep_number               int32 4B ...
│           sweep_mode                 <U20 80B 'azimuth_surveillance'
│           prt_mode                   |S32 32B ...
│           follow_mode                |S32 32B ...
│           sweep_fixed_angle          float32 4B ...
│           pulse_width                (azimuth) float32 2kB ...
│           ...                         ...
│           r_calib_index              (azimuth) int8 483B ...
│           measured_transmit_power_h  (azimuth) float32 2kB ...
│           measured_transmit_power_v  (azimuth) float32 2kB ...
│           scan_rate                  (azimuth) float32 2kB ...
│           DBZ                        (azimuth, range) float32 2MB ...
│           VR                         (azimuth, range) float32 2MB ...
├── Group: /sweep_4
│       Dimensions:                    (azimuth: 481, range: 996)
│       Coordinates:
│         * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
│           elevation                  (azimuth) float32 2kB ...
│           time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:18:...
│         * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
│       Data variables: (12/18)
│           sweep_number               int32 4B ...
│           sweep_mode                 <U20 80B 'azimuth_surveillance'
│           prt_mode                   |S32 32B ...
│           follow_mode                |S32 32B ...
│           sweep_fixed_angle          float32 4B ...
│           pulse_width                (azimuth) float32 2kB ...
│           ...                         ...
│           r_calib_index              (azimuth) int8 481B ...
│           measured_transmit_power_h  (azimuth) float32 2kB ...
│           measured_transmit_power_v  (azimuth) float32 2kB ...
│           scan_rate                  (azimuth) float32 2kB ...
│           DBZ                        (azimuth, range) float32 2MB ...
│           VR                         (azimuth, range) float32 2MB ...
├── Group: /sweep_5
│       Dimensions:                    (azimuth: 482, range: 996)
│       Coordinates:
│         * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
│           elevation                  (azimuth) float32 2kB ...
│           time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:19:...
│         * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
│       Data variables: (12/18)
│           sweep_number               int32 4B ...
│           sweep_mode                 <U20 80B 'azimuth_surveillance'
│           prt_mode                   |S32 32B ...
│           follow_mode                |S32 32B ...
│           sweep_fixed_angle          float32 4B ...
│           pulse_width                (azimuth) float32 2kB ...
│           ...                         ...
│           r_calib_index              (azimuth) int8 482B ...
│           measured_transmit_power_h  (azimuth) float32 2kB ...
│           measured_transmit_power_v  (azimuth) float32 2kB ...
│           scan_rate                  (azimuth) float32 2kB ...
│           DBZ                        (azimuth, range) float32 2MB ...
│           VR                         (azimuth, range) float32 2MB ...
├── Group: /sweep_6
│       Dimensions:                    (azimuth: 482, range: 996)
│       Coordinates:
│         * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
│           elevation                  (azimuth) float32 2kB ...
│           time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:20:...
│         * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
│       Data variables: (12/18)
│           sweep_number               int32 4B ...
│           sweep_mode                 <U20 80B 'azimuth_surveillance'
│           prt_mode                   |S32 32B ...
│           follow_mode                |S32 32B ...
│           sweep_fixed_angle          float32 4B ...
│           pulse_width                (azimuth) float32 2kB ...
│           ...                         ...
│           r_calib_index              (azimuth) int8 482B ...
│           measured_transmit_power_h  (azimuth) float32 2kB ...
│           measured_transmit_power_v  (azimuth) float32 2kB ...
│           scan_rate                  (azimuth) float32 2kB ...
│           DBZ                        (azimuth, range) float32 2MB ...
│           VR                         (azimuth, range) float32 2MB ...
├── Group: /sweep_7
│       Dimensions:                    (azimuth: 484, range: 996)
│       Coordinates:
│         * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
│           elevation                  (azimuth) float32 2kB ...
│           time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:21:...
│         * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
│       Data variables: (12/18)
│           sweep_number               int32 4B ...
│           sweep_mode                 <U20 80B 'azimuth_surveillance'
│           prt_mode                   |S32 32B ...
│           follow_mode                |S32 32B ...
│           sweep_fixed_angle          float32 4B ...
│           pulse_width                (azimuth) float32 2kB ...
│           ...                         ...
│           r_calib_index              (azimuth) int8 484B ...
│           measured_transmit_power_h  (azimuth) float32 2kB ...
│           measured_transmit_power_v  (azimuth) float32 2kB ...
│           scan_rate                  (azimuth) float32 2kB ...
│           DBZ                        (azimuth, range) float32 2MB ...
│           VR                         (azimuth, range) float32 2MB ...
└── Group: /sweep_8
        Dimensions:                    (azimuth: 483, range: 996)
        Coordinates:
          * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
            elevation                  (azimuth) float32 2kB ...
            time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:21:...
          * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
        Data variables: (12/18)
            sweep_number               int32 4B ...
            sweep_mode                 <U20 80B 'azimuth_surveillance'
            prt_mode                   |S32 32B ...
            follow_mode                |S32 32B ...
            sweep_fixed_angle          float32 4B ...
            pulse_width                (azimuth) float32 2kB ...
            ...                         ...
            r_calib_index              (azimuth) int8 483B ...
            measured_transmit_power_h  (azimuth) float32 2kB ...
            measured_transmit_power_v  (azimuth) float32 2kB ...
            scan_rate                  (azimuth) float32 2kB ...
            DBZ                        (azimuth, range) float32 2MB ...
            VR                         (azimuth, range) float32 2MB ...

xarray.DataTree

• /sweep_0(22)

  • Dimensions:
    • sweep: 9
    • azimuth: 483
    • range: 996
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],shape=(483,), dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [483 values with dtype=float32]

    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:15:34 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:15:34.000000000', '2008-06-04T00:15:34.000000000','2008-06-04T00:15:34.000000000', ..., '2008-06-04T00:15:33.000000000','2008-06-04T00:15:33.000000000', '2008-06-04T00:15:34.000000000'],shape=(483,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,149250.     , 149400.     ], shape=(996,), dtype=float32)

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      standard_name :

      scan_mode_for_sweep

      options :

      sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      float32
      ...

      standard_name :

      transmitter_pulse_width

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • prt
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • prt_ratio
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [483 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [483 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [483 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

  /sweep_1(22)

  • Dimensions:
    • sweep: 9
    • azimuth: 483
    • range: 996
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],shape=(483,), dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [483 values with dtype=float32]

    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:16:21 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:16:21.000000000', '2008-06-04T00:16:21.000000000','2008-06-04T00:16:21.000000000', ..., '2008-06-04T00:16:20.000000000','2008-06-04T00:16:20.000000000', '2008-06-04T00:16:20.000000000'],shape=(483,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,149250.     , 149400.     ], shape=(996,), dtype=float32)

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      standard_name :

      scan_mode_for_sweep

      options :

      sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      float32
      ...

      standard_name :

      transmitter_pulse_width

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • prt
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • prt_ratio
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [483 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [483 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [483 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

  /sweep_2(22)

  • Dimensions:
    • sweep: 9
    • azimuth: 482
    • range: 996
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],shape=(482,), dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [482 values with dtype=float32]

    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:17:07 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:17:07.000000000', '2008-06-04T00:17:08.000000000','2008-06-04T00:17:08.000000000', ..., '2008-06-04T00:17:07.000000000','2008-06-04T00:17:07.000000000', '2008-06-04T00:17:07.000000000'],shape=(482,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,149250.     , 149400.     ], shape=(996,), dtype=float32)

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      standard_name :

      scan_mode_for_sweep

      options :

      sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      float32
      ...

      standard_name :

      transmitter_pulse_width

      units :

      seconds

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • prt
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency

      units :

      seconds

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • prt_ratio
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      units :

      seconds

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [482 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [482 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [482 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

  /sweep_3(22)

  • Dimensions:
    • sweep: 9
    • azimuth: 483
    • range: 996
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],shape=(483,), dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [483 values with dtype=float32]

    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:17:54 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:17:54.000000000', '2008-06-04T00:17:54.000000000','2008-06-04T00:17:55.000000000', ..., '2008-06-04T00:17:54.000000000','2008-06-04T00:17:54.000000000', '2008-06-04T00:17:54.000000000'],shape=(483,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,149250.     , 149400.     ], shape=(996,), dtype=float32)

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      standard_name :

      scan_mode_for_sweep

      options :

      sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      float32
      ...

      standard_name :

      transmitter_pulse_width

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • prt
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • prt_ratio
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [483 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [483 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [483 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

  /sweep_4(22)

  • Dimensions:
    • sweep: 9
    • azimuth: 481
    • range: 996
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],shape=(481,), dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [481 values with dtype=float32]

    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:18:41 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:18:41.000000000', '2008-06-04T00:18:41.000000000','2008-06-04T00:18:41.000000000', ..., '2008-06-04T00:18:41.000000000','2008-06-04T00:18:41.000000000', '2008-06-04T00:18:41.000000000'],shape=(481,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,149250.     , 149400.     ], shape=(996,), dtype=float32)

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      standard_name :

      scan_mode_for_sweep

      options :

      sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      float32
      ...

      standard_name :

      transmitter_pulse_width

      units :

      seconds

      meta_group :

      instrument_parameters

      [481 values with dtype=float32]

    • prt
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency

      units :

      seconds

      meta_group :

      instrument_parameters

      [481 values with dtype=float32]

    • prt_ratio
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      units :

      seconds

      meta_group :

      instrument_parameters

      [481 values with dtype=float32]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [481 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [481 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [481 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [481 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [481 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [481 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [481 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [481 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [479076 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [479076 values with dtype=float32]

  /sweep_5(22)

  • Dimensions:
    • sweep: 9
    • azimuth: 482
    • range: 996
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],shape=(482,), dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [482 values with dtype=float32]

    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:19:28 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:19:28.000000000', '2008-06-04T00:19:28.000000000','2008-06-04T00:19:28.000000000', ..., '2008-06-04T00:19:28.000000000','2008-06-04T00:19:28.000000000', '2008-06-04T00:19:28.000000000'],shape=(482,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,149250.     , 149400.     ], shape=(996,), dtype=float32)

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      standard_name :

      scan_mode_for_sweep

      options :

      sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      float32
      ...

      standard_name :

      transmitter_pulse_width

      units :

      seconds

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • prt
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency

      units :

      seconds

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • prt_ratio
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      units :

      seconds

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [482 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [482 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [482 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

  /sweep_6(22)

  • Dimensions:
    • sweep: 9
    • azimuth: 482
    • range: 996
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],shape=(482,), dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [482 values with dtype=float32]

    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:20:15 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:20:15.000000000', '2008-06-04T00:20:15.000000000','2008-06-04T00:20:15.000000000', ..., '2008-06-04T00:20:15.000000000','2008-06-04T00:20:15.000000000', '2008-06-04T00:20:15.000000000'],shape=(482,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,149250.     , 149400.     ], shape=(996,), dtype=float32)

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      standard_name :

      scan_mode_for_sweep

      options :

      sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      float32
      ...

      standard_name :

      transmitter_pulse_width

      units :

      seconds

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • prt
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency

      units :

      seconds

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • prt_ratio
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      units :

      seconds

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [482 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [482 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [482 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

  /sweep_7(22)

  • Dimensions:
    • sweep: 9
    • azimuth: 484
    • range: 996
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],shape=(484,), dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [484 values with dtype=float32]

    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:21:02 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:21:02.000000000', '2008-06-04T00:21:02.000000000','2008-06-04T00:21:02.000000000', ..., '2008-06-04T00:21:02.000000000','2008-06-04T00:21:02.000000000', '2008-06-04T00:21:02.000000000'],shape=(484,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,149250.     , 149400.     ], shape=(996,), dtype=float32)

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      standard_name :

      scan_mode_for_sweep

      options :

      sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      float32
      ...

      standard_name :

      transmitter_pulse_width

      units :

      seconds

      meta_group :

      instrument_parameters

      [484 values with dtype=float32]

    • prt
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency

      units :

      seconds

      meta_group :

      instrument_parameters

      [484 values with dtype=float32]

    • prt_ratio
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      units :

      seconds

      meta_group :

      instrument_parameters

      [484 values with dtype=float32]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [484 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [484 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [484 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [484 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [484 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [484 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [484 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [484 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [482064 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [482064 values with dtype=float32]

  /sweep_8(22)

  • Dimensions:
    • sweep: 9
    • azimuth: 483
    • range: 996
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],shape=(483,), dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [483 values with dtype=float32]

    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:21:49 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:21:49.000000000', '2008-06-04T00:21:49.000000000','2008-06-04T00:21:49.000000000', ..., '2008-06-04T00:21:49.000000000','2008-06-04T00:21:49.000000000', '2008-06-04T00:21:49.000000000'],shape=(483,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,149250.     , 149400.     ], shape=(996,), dtype=float32)

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      standard_name :

      scan_mode_for_sweep

      options :

      sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      float32
      ...

      standard_name :

      transmitter_pulse_width

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • prt
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • prt_ratio
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [483 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [483 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [483 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

• Dimensions:
  • sweep: 9
• Coordinates: (3)
  • latitude
    ()
    float64
    ...

    standard_name :

    latitude

    units :

    degrees_north

    [1 values with dtype=float64]

  • longitude
    ()
    float64
    ...

    standard_name :

    longitude

    units :

    degrees_east

    [1 values with dtype=float64]

  • altitude
    ()
    float64
    ...

    standard_name :

    altitude

    units :

    meters

    positive :

    up

    [1 values with dtype=float64]

• Data variables: (9)
  • volume_number
    ()
    int32
    ...

    standard_name :

    data_volume_index_number

    [1 values with dtype=int32]

  • platform_type
    ()
    |S32
    ...

    standard_name :

    platform_type

    options :

    fixed, vehicle, ship, aircraft_fore, aircraft_aft, aircraft_tail, aircraft_belly, aircraft_roof, aircraft_nose, satellite_orbit, satellite_geostat

    [1 values with dtype=|S32]

  • primary_axis
    ()
    |S32
    ...

    standard_name :

    primary_axis_of_rotation

    options :

    axis_z, axis_y, axis_x

    [1 values with dtype=|S32]

  • status_str
    ()
    |S1
    ...

    standard_name :

    status_xml

    [1 values with dtype=|S1]

  • instrument_type
    ()
    |S32
    ...

    standard_name :

    type_of_instrument

    options :

    radar, lidar

    meta_group :

    instrument_parameters

    [1 values with dtype=|S32]

  • time_coverage_start
    ()
    |S32
    ...

    standard_name :

    data_volume_start_time_utc

    comment :

    ray times are relative to start time in secs

    [1 values with dtype=|S32]

  • time_coverage_end
    ()
    |S32
    ...

    standard_name :

    data_volume_end_time_utc

    [1 values with dtype=|S32]

  • sweep_group_name
    (sweep)
    <U7
    'sweep_0' 'sweep_1' ... 'sweep_8'

    array(['sweep_0', 'sweep_1', 'sweep_2', 'sweep_3', 'sweep_4', 'sweep_5',
           'sweep_6', 'sweep_7', 'sweep_8'], dtype='<U7')

  • sweep_fixed_angle
    (sweep)
    float32
    ...

    standard_name :

    beam_target_fixed_angle

    units :

    degrees

    [9 values with dtype=float32]

• Attributes: (13)

  Conventions :

  CF/Radial instrument_parameters radar_parameters radar_calibration geometry_correction

  version :

  1.2

  title :

  TIMREX

  institution :

  references :

  source :

  history :

  comment :

  instrument_name :

  SPOLRVP8

  site_name :

  scan_name :

  scan_id :

  0

  platform_is_mobile :

  false

Inspect root group

The sweep dimension contains the number of scans in this radar volume. Further the dataset consists of variables (location coordinates, time_coverage) and attributes (Conventions, metadata).

vol.root

<xarray.DataTree>
Group: /
│   Dimensions:              (sweep: 9)
│   Coordinates:
│       latitude             float64 8B ...
│       longitude            float64 8B ...
│       altitude             float64 8B ...
│   Dimensions without coordinates: sweep
│   Data variables:
│       volume_number        int32 4B ...
│       platform_type        |S32 32B ...
│       primary_axis         |S32 32B ...
│       status_str           |S1 1B ...
│       instrument_type      |S32 32B ...
│       time_coverage_start  |S32 32B ...
│       time_coverage_end    |S32 32B ...
│       sweep_group_name     (sweep) <U7 252B 'sweep_0' 'sweep_1' ... 'sweep_8'
│       sweep_fixed_angle    (sweep) float32 36B ...
│   Attributes: (12/13)
│       Conventions:         CF/Radial instrument_parameters radar_parameters rad...
│       version:             1.2
│       title:               TIMREX
│       institution:         
│       references:          
│       source:              
│       ...                  ...
│       comment:             
│       instrument_name:     SPOLRVP8
│       site_name:           
│       scan_name:           
│       scan_id:             0
│       platform_is_mobile:  false
├── Group: /sweep_0
│       Dimensions:                    (azimuth: 483, range: 996)
│       Coordinates:
│         * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
│           elevation                  (azimuth) float32 2kB ...
│           time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:15:...
│         * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
│       Data variables: (12/18)
│           sweep_number               int32 4B ...
│           sweep_mode                 <U20 80B 'azimuth_surveillance'
│           prt_mode                   |S32 32B ...
│           follow_mode                |S32 32B ...
│           sweep_fixed_angle          float32 4B ...
│           pulse_width                (azimuth) float32 2kB ...
│           ...                         ...
│           r_calib_index              (azimuth) int8 483B ...
│           measured_transmit_power_h  (azimuth) float32 2kB ...
│           measured_transmit_power_v  (azimuth) float32 2kB ...
│           scan_rate                  (azimuth) float32 2kB ...
│           DBZ                        (azimuth, range) float32 2MB ...
│           VR                         (azimuth, range) float32 2MB ...
├── Group: /sweep_1
│       Dimensions:                    (azimuth: 483, range: 996)
│       Coordinates:
│         * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
│           elevation                  (azimuth) float32 2kB ...
│           time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:16:...
│         * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
│       Data variables: (12/18)
│           sweep_number               int32 4B ...
│           sweep_mode                 <U20 80B 'azimuth_surveillance'
│           prt_mode                   |S32 32B ...
│           follow_mode                |S32 32B ...
│           sweep_fixed_angle          float32 4B ...
│           pulse_width                (azimuth) float32 2kB ...
│           ...                         ...
│           r_calib_index              (azimuth) int8 483B ...
│           measured_transmit_power_h  (azimuth) float32 2kB ...
│           measured_transmit_power_v  (azimuth) float32 2kB ...
│           scan_rate                  (azimuth) float32 2kB ...
│           DBZ                        (azimuth, range) float32 2MB ...
│           VR                         (azimuth, range) float32 2MB ...
├── Group: /sweep_2
│       Dimensions:                    (azimuth: 482, range: 996)
│       Coordinates:
│         * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
│           elevation                  (azimuth) float32 2kB ...
│           time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:17:...
│         * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
│       Data variables: (12/18)
│           sweep_number               int32 4B ...
│           sweep_mode                 <U20 80B 'azimuth_surveillance'
│           prt_mode                   |S32 32B ...
│           follow_mode                |S32 32B ...
│           sweep_fixed_angle          float32 4B ...
│           pulse_width                (azimuth) float32 2kB ...
│           ...                         ...
│           r_calib_index              (azimuth) int8 482B ...
│           measured_transmit_power_h  (azimuth) float32 2kB ...
│           measured_transmit_power_v  (azimuth) float32 2kB ...
│           scan_rate                  (azimuth) float32 2kB ...
│           DBZ                        (azimuth, range) float32 2MB ...
│           VR                         (azimuth, range) float32 2MB ...
├── Group: /sweep_3
│       Dimensions:                    (azimuth: 483, range: 996)
│       Coordinates:
│         * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
│           elevation                  (azimuth) float32 2kB ...
│           time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:17:...
│         * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
│       Data variables: (12/18)
│           sweep_number               int32 4B ...
│           sweep_mode                 <U20 80B 'azimuth_surveillance'
│           prt_mode                   |S32 32B ...
│           follow_mode                |S32 32B ...
│           sweep_fixed_angle          float32 4B ...
│           pulse_width                (azimuth) float32 2kB ...
│           ...                         ...
│           r_calib_index              (azimuth) int8 483B ...
│           measured_transmit_power_h  (azimuth) float32 2kB ...
│           measured_transmit_power_v  (azimuth) float32 2kB ...
│           scan_rate                  (azimuth) float32 2kB ...
│           DBZ                        (azimuth, range) float32 2MB ...
│           VR                         (azimuth, range) float32 2MB ...
├── Group: /sweep_4
│       Dimensions:                    (azimuth: 481, range: 996)
│       Coordinates:
│         * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
│           elevation                  (azimuth) float32 2kB ...
│           time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:18:...
│         * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
│       Data variables: (12/18)
│           sweep_number               int32 4B ...
│           sweep_mode                 <U20 80B 'azimuth_surveillance'
│           prt_mode                   |S32 32B ...
│           follow_mode                |S32 32B ...
│           sweep_fixed_angle          float32 4B ...
│           pulse_width                (azimuth) float32 2kB ...
│           ...                         ...
│           r_calib_index              (azimuth) int8 481B ...
│           measured_transmit_power_h  (azimuth) float32 2kB ...
│           measured_transmit_power_v  (azimuth) float32 2kB ...
│           scan_rate                  (azimuth) float32 2kB ...
│           DBZ                        (azimuth, range) float32 2MB ...
│           VR                         (azimuth, range) float32 2MB ...
├── Group: /sweep_5
│       Dimensions:                    (azimuth: 482, range: 996)
│       Coordinates:
│         * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
│           elevation                  (azimuth) float32 2kB ...
│           time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:19:...
│         * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
│       Data variables: (12/18)
│           sweep_number               int32 4B ...
│           sweep_mode                 <U20 80B 'azimuth_surveillance'
│           prt_mode                   |S32 32B ...
│           follow_mode                |S32 32B ...
│           sweep_fixed_angle          float32 4B ...
│           pulse_width                (azimuth) float32 2kB ...
│           ...                         ...
│           r_calib_index              (azimuth) int8 482B ...
│           measured_transmit_power_h  (azimuth) float32 2kB ...
│           measured_transmit_power_v  (azimuth) float32 2kB ...
│           scan_rate                  (azimuth) float32 2kB ...
│           DBZ                        (azimuth, range) float32 2MB ...
│           VR                         (azimuth, range) float32 2MB ...
├── Group: /sweep_6
│       Dimensions:                    (azimuth: 482, range: 996)
│       Coordinates:
│         * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
│           elevation                  (azimuth) float32 2kB ...
│           time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:20:...
│         * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
│       Data variables: (12/18)
│           sweep_number               int32 4B ...
│           sweep_mode                 <U20 80B 'azimuth_surveillance'
│           prt_mode                   |S32 32B ...
│           follow_mode                |S32 32B ...
│           sweep_fixed_angle          float32 4B ...
│           pulse_width                (azimuth) float32 2kB ...
│           ...                         ...
│           r_calib_index              (azimuth) int8 482B ...
│           measured_transmit_power_h  (azimuth) float32 2kB ...
│           measured_transmit_power_v  (azimuth) float32 2kB ...
│           scan_rate                  (azimuth) float32 2kB ...
│           DBZ                        (azimuth, range) float32 2MB ...
│           VR                         (azimuth, range) float32 2MB ...
├── Group: /sweep_7
│       Dimensions:                    (azimuth: 484, range: 996)
│       Coordinates:
│         * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
│           elevation                  (azimuth) float32 2kB ...
│           time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:21:...
│         * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
│       Data variables: (12/18)
│           sweep_number               int32 4B ...
│           sweep_mode                 <U20 80B 'azimuth_surveillance'
│           prt_mode                   |S32 32B ...
│           follow_mode                |S32 32B ...
│           sweep_fixed_angle          float32 4B ...
│           pulse_width                (azimuth) float32 2kB ...
│           ...                         ...
│           r_calib_index              (azimuth) int8 484B ...
│           measured_transmit_power_h  (azimuth) float32 2kB ...
│           measured_transmit_power_v  (azimuth) float32 2kB ...
│           scan_rate                  (azimuth) float32 2kB ...
│           DBZ                        (azimuth, range) float32 2MB ...
│           VR                         (azimuth, range) float32 2MB ...
└── Group: /sweep_8
        Dimensions:                    (azimuth: 483, range: 996)
        Coordinates:
          * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
            elevation                  (azimuth) float32 2kB ...
            time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:21:...
          * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
        Data variables: (12/18)
            sweep_number               int32 4B ...
            sweep_mode                 <U20 80B 'azimuth_surveillance'
            prt_mode                   |S32 32B ...
            follow_mode                |S32 32B ...
            sweep_fixed_angle          float32 4B ...
            pulse_width                (azimuth) float32 2kB ...
            ...                         ...
            r_calib_index              (azimuth) int8 483B ...
            measured_transmit_power_h  (azimuth) float32 2kB ...
            measured_transmit_power_v  (azimuth) float32 2kB ...
            scan_rate                  (azimuth) float32 2kB ...
            DBZ                        (azimuth, range) float32 2MB ...
            VR                         (azimuth, range) float32 2MB ...

xarray.DataTree

• /sweep_0(22)

  • Dimensions:
    • sweep: 9
    • azimuth: 483
    • range: 996
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],shape=(483,), dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [483 values with dtype=float32]

    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:15:34 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:15:34.000000000', '2008-06-04T00:15:34.000000000','2008-06-04T00:15:34.000000000', ..., '2008-06-04T00:15:33.000000000','2008-06-04T00:15:33.000000000', '2008-06-04T00:15:34.000000000'],shape=(483,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,149250.     , 149400.     ], shape=(996,), dtype=float32)

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      standard_name :

      scan_mode_for_sweep

      options :

      sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      float32
      ...

      standard_name :

      transmitter_pulse_width

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • prt
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • prt_ratio
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [483 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [483 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [483 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

  /sweep_1(22)

  • Dimensions:
    • sweep: 9
    • azimuth: 483
    • range: 996
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],shape=(483,), dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [483 values with dtype=float32]

    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:16:21 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:16:21.000000000', '2008-06-04T00:16:21.000000000','2008-06-04T00:16:21.000000000', ..., '2008-06-04T00:16:20.000000000','2008-06-04T00:16:20.000000000', '2008-06-04T00:16:20.000000000'],shape=(483,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,149250.     , 149400.     ], shape=(996,), dtype=float32)

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      standard_name :

      scan_mode_for_sweep

      options :

      sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      float32
      ...

      standard_name :

      transmitter_pulse_width

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • prt
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • prt_ratio
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [483 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [483 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [483 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

  /sweep_2(22)

  • Dimensions:
    • sweep: 9
    • azimuth: 482
    • range: 996
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],shape=(482,), dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [482 values with dtype=float32]

    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:17:07 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:17:07.000000000', '2008-06-04T00:17:08.000000000','2008-06-04T00:17:08.000000000', ..., '2008-06-04T00:17:07.000000000','2008-06-04T00:17:07.000000000', '2008-06-04T00:17:07.000000000'],shape=(482,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,149250.     , 149400.     ], shape=(996,), dtype=float32)

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      standard_name :

      scan_mode_for_sweep

      options :

      sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      float32
      ...

      standard_name :

      transmitter_pulse_width

      units :

      seconds

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • prt
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency

      units :

      seconds

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • prt_ratio
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      units :

      seconds

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [482 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [482 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [482 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

  /sweep_3(22)

  • Dimensions:
    • sweep: 9
    • azimuth: 483
    • range: 996
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],shape=(483,), dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [483 values with dtype=float32]

    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:17:54 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:17:54.000000000', '2008-06-04T00:17:54.000000000','2008-06-04T00:17:55.000000000', ..., '2008-06-04T00:17:54.000000000','2008-06-04T00:17:54.000000000', '2008-06-04T00:17:54.000000000'],shape=(483,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,149250.     , 149400.     ], shape=(996,), dtype=float32)

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      standard_name :

      scan_mode_for_sweep

      options :

      sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      float32
      ...

      standard_name :

      transmitter_pulse_width

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • prt
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • prt_ratio
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [483 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [483 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [483 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

  /sweep_4(22)

  • Dimensions:
    • sweep: 9
    • azimuth: 481
    • range: 996
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],shape=(481,), dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [481 values with dtype=float32]

    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:18:41 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:18:41.000000000', '2008-06-04T00:18:41.000000000','2008-06-04T00:18:41.000000000', ..., '2008-06-04T00:18:41.000000000','2008-06-04T00:18:41.000000000', '2008-06-04T00:18:41.000000000'],shape=(481,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,149250.     , 149400.     ], shape=(996,), dtype=float32)

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      standard_name :

      scan_mode_for_sweep

      options :

      sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      float32
      ...

      standard_name :

      transmitter_pulse_width

      units :

      seconds

      meta_group :

      instrument_parameters

      [481 values with dtype=float32]

    • prt
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency

      units :

      seconds

      meta_group :

      instrument_parameters

      [481 values with dtype=float32]

    • prt_ratio
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      units :

      seconds

      meta_group :

      instrument_parameters

      [481 values with dtype=float32]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [481 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [481 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [481 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [481 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [481 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [481 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [481 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [481 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [479076 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [479076 values with dtype=float32]

  /sweep_5(22)

  • Dimensions:
    • sweep: 9
    • azimuth: 482
    • range: 996
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],shape=(482,), dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [482 values with dtype=float32]

    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:19:28 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:19:28.000000000', '2008-06-04T00:19:28.000000000','2008-06-04T00:19:28.000000000', ..., '2008-06-04T00:19:28.000000000','2008-06-04T00:19:28.000000000', '2008-06-04T00:19:28.000000000'],shape=(482,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,149250.     , 149400.     ], shape=(996,), dtype=float32)

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      standard_name :

      scan_mode_for_sweep

      options :

      sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      float32
      ...

      standard_name :

      transmitter_pulse_width

      units :

      seconds

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • prt
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency

      units :

      seconds

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • prt_ratio
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      units :

      seconds

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [482 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [482 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [482 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

  /sweep_6(22)

  • Dimensions:
    • sweep: 9
    • azimuth: 482
    • range: 996
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],shape=(482,), dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [482 values with dtype=float32]

    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:20:15 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:20:15.000000000', '2008-06-04T00:20:15.000000000','2008-06-04T00:20:15.000000000', ..., '2008-06-04T00:20:15.000000000','2008-06-04T00:20:15.000000000', '2008-06-04T00:20:15.000000000'],shape=(482,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,149250.     , 149400.     ], shape=(996,), dtype=float32)

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      standard_name :

      scan_mode_for_sweep

      options :

      sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      float32
      ...

      standard_name :

      transmitter_pulse_width

      units :

      seconds

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • prt
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency

      units :

      seconds

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • prt_ratio
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      units :

      seconds

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [482 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [482 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [482 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [482 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [482 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [480072 values with dtype=float32]

  /sweep_7(22)

  • Dimensions:
    • sweep: 9
    • azimuth: 484
    • range: 996
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],shape=(484,), dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [484 values with dtype=float32]

    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:21:02 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:21:02.000000000', '2008-06-04T00:21:02.000000000','2008-06-04T00:21:02.000000000', ..., '2008-06-04T00:21:02.000000000','2008-06-04T00:21:02.000000000', '2008-06-04T00:21:02.000000000'],shape=(484,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,149250.     , 149400.     ], shape=(996,), dtype=float32)

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      standard_name :

      scan_mode_for_sweep

      options :

      sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      float32
      ...

      standard_name :

      transmitter_pulse_width

      units :

      seconds

      meta_group :

      instrument_parameters

      [484 values with dtype=float32]

    • prt
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency

      units :

      seconds

      meta_group :

      instrument_parameters

      [484 values with dtype=float32]

    • prt_ratio
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      units :

      seconds

      meta_group :

      instrument_parameters

      [484 values with dtype=float32]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [484 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [484 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [484 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [484 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [484 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [484 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [484 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [484 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [482064 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [482064 values with dtype=float32]

  /sweep_8(22)

  • Dimensions:
    • sweep: 9
    • azimuth: 483
    • range: 996
  • Coordinates: (4)
    • azimuth
      (azimuth)
      float32
      0.0 0.75 1.5 ... 357.8 358.5 359.2

      standard_name :

      beam_azimuth_angle

      units :

      degrees

      array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],shape=(483,), dtype=float32)

    • elevation
      (azimuth)
      float32
      ...

      standard_name :

      beam_elevation_angle

      units :

      degrees

      positive :

      up

      [483 values with dtype=float32]

    • time
      (azimuth)
      datetime64[ns]
      2008-06-04T00:21:49 ... 2008-06-...

      standard_name :

      time

      long_name :

      time in seconds since volume start

      comment :

      times are relative to the volume start_time

      array(['2008-06-04T00:21:49.000000000', '2008-06-04T00:21:49.000000000','2008-06-04T00:21:49.000000000', ..., '2008-06-04T00:21:49.000000000','2008-06-04T00:21:49.000000000', '2008-06-04T00:21:49.000000000'],shape=(483,), dtype='datetime64[ns]')

    • range
      (range)
      float32
      150.0 300.0 ... 1.492e+05 1.494e+05

      standard_name :

      range_to_center_of_measurement_volume

      long_name :

      Range from instrument to center of gate

      units :

      meters

      spacing_is_constant :

      true

      meters_to_center_of_first_gate :

      150.00000596046448

      meters_between_gates :

      150.00000596046448

      array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,149250.     , 149400.     ], shape=(996,), dtype=float32)

  • Data variables: (18)
    • sweep_number
      ()
      int32
      ...

      standard_name :

      sweep_index_number_0_based

      [1 values with dtype=int32]

    • sweep_mode
      ()
      <U20
      'azimuth_surveillance'

      standard_name :

      scan_mode_for_sweep

      options :

      sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

      array('azimuth_surveillance', dtype='<U20')

    • prt_mode
      ()
      |S32
      ...

      standard_name :

      transmit_pulse_mode

      options :

      fixed, staggered, dual

      meta_group :

      radar_parameters

      [1 values with dtype=|S32]

    • follow_mode
      ()
      |S32
      ...

      standard_name :

      follow_mode_for_scan_strategy

      options :

      none, sun, vehicle, aircraft, target, manual

      meta_group :

      instrument_parameters

      [1 values with dtype=|S32]

    • sweep_fixed_angle
      ()
      float32
      ...

      standard_name :

      beam_target_fixed_angle

      units :

      degrees

      [1 values with dtype=float32]

    • pulse_width
      (azimuth)
      float32
      ...

      standard_name :

      transmitter_pulse_width

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • prt
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • prt_ratio
      (azimuth)
      float32
      ...

      standard_name :

      pulse_repetition_frequency_ratio

      units :

      seconds

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • nyquist_velocity
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_doppler_velocity

      units :

      meters per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • unambiguous_range
      (azimuth)
      float32
      ...

      standard_name :

      unambiguous_range

      units :

      meters

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • antenna_transition
      (azimuth)
      int8
      ...

      standard_name :

      antenna_is_in_transition_between_sweeps

      comment :

      1 if antenna is in transition, 0 otherwise

      [483 values with dtype=int8]

    • n_samples
      (azimuth)
      int32
      ...

      standard_name :

      number_of_samples_used_to_compute_moments

      meta_group :

      instrument_parameters

      [483 values with dtype=int32]

    • r_calib_index
      (azimuth)
      int8
      ...

      standard_name :

      calibration_data_array_index_per_ray

      meta_group :

      radar_calibration

      comment :

      This is the index for the calibration which applies to this ray

      [483 values with dtype=int8]

    • measured_transmit_power_h
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_h_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • measured_transmit_power_v
      (azimuth)
      float32
      ...

      standard_name :

      measured_radar_transmit_power_v_channel

      units :

      dBm

      meta_group :

      radar_parameters

      [483 values with dtype=float32]

    • scan_rate
      (azimuth)
      float32
      ...

      standard_name :

      antenna_angle_scan_rate

      units :

      degrees per second

      meta_group :

      instrument_parameters

      [483 values with dtype=float32]

    • DBZ
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Horizontal Co-polar Reflectivit

      standard_name :

      equivalent_reflectivity_factor

      units :

      dBZ

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

    • VR
      (azimuth, range)
      float32
      ...

      long_name :

      Computed Velocity

      standard_name :

      radial_velocity_of_scatterers_away_from_instrument

      units :

      m/s

      threshold_field_name :

      threshold_value :

      -9999.0

      sampling_ratio :

      1.0

      grid_mapping :

      grid_mapping

      [481068 values with dtype=float32]

• Dimensions:
  • sweep: 9
• Coordinates: (3)
  • latitude
    ()
    float64
    ...

    standard_name :

    latitude

    units :

    degrees_north

    [1 values with dtype=float64]

  • longitude
    ()
    float64
    ...

    standard_name :

    longitude

    units :

    degrees_east

    [1 values with dtype=float64]

  • altitude
    ()
    float64
    ...

    standard_name :

    altitude

    units :

    meters

    positive :

    up

    [1 values with dtype=float64]

• Data variables: (9)
  • volume_number
    ()
    int32
    ...

    standard_name :

    data_volume_index_number

    [1 values with dtype=int32]

  • platform_type
    ()
    |S32
    ...

    standard_name :

    platform_type

    options :

    fixed, vehicle, ship, aircraft_fore, aircraft_aft, aircraft_tail, aircraft_belly, aircraft_roof, aircraft_nose, satellite_orbit, satellite_geostat

    [1 values with dtype=|S32]

  • primary_axis
    ()
    |S32
    ...

    standard_name :

    primary_axis_of_rotation

    options :

    axis_z, axis_y, axis_x

    [1 values with dtype=|S32]

  • status_str
    ()
    |S1
    ...

    standard_name :

    status_xml

    [1 values with dtype=|S1]

  • instrument_type
    ()
    |S32
    ...

    standard_name :

    type_of_instrument

    options :

    radar, lidar

    meta_group :

    instrument_parameters

    [1 values with dtype=|S32]

  • time_coverage_start
    ()
    |S32
    ...

    standard_name :

    data_volume_start_time_utc

    comment :

    ray times are relative to start time in secs

    [1 values with dtype=|S32]

  • time_coverage_end
    ()
    |S32
    ...

    standard_name :

    data_volume_end_time_utc

    [1 values with dtype=|S32]

  • sweep_group_name
    (sweep)
    <U7
    'sweep_0' 'sweep_1' ... 'sweep_8'

    array(['sweep_0', 'sweep_1', 'sweep_2', 'sweep_3', 'sweep_4', 'sweep_5',
           'sweep_6', 'sweep_7', 'sweep_8'], dtype='<U7')

  • sweep_fixed_angle
    (sweep)
    float32
    ...

    standard_name :

    beam_target_fixed_angle

    units :

    degrees

    [9 values with dtype=float32]

• Attributes: (13)

  Conventions :

  CF/Radial instrument_parameters radar_parameters radar_calibration geometry_correction

  version :

  1.2

  title :

  TIMREX

  institution :

  references :

  source :

  history :

  comment :

  instrument_name :

  SPOLRVP8

  site_name :

  scan_name :

  scan_id :

  0

  platform_is_mobile :

  false

Inspect sweep group(s)

The sweep-groups can be accessed via their respective keys. The dimensions consist of range and time with added coordinates azimuth, elevation, range and time. There will be variables like radar moments (DBZH etc.) and sweep-dependent metadata (like fixed_angle, sweep_mode etc.).

display(vol["sweep_0"])

<xarray.DataTree 'sweep_0'>
Group: /sweep_0
    Dimensions:                    (sweep: 9, azimuth: 483, range: 996)
    Coordinates:
      * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
        elevation                  (azimuth) float32 2kB ...
        time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:15:...
      * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    Dimensions without coordinates: sweep
    Data variables: (12/18)
        sweep_number               int32 4B ...
        sweep_mode                 <U20 80B 'azimuth_surveillance'
        prt_mode                   |S32 32B ...
        follow_mode                |S32 32B ...
        sweep_fixed_angle          float32 4B ...
        pulse_width                (azimuth) float32 2kB ...
        ...                         ...
        r_calib_index              (azimuth) int8 483B ...
        measured_transmit_power_h  (azimuth) float32 2kB ...
        measured_transmit_power_v  (azimuth) float32 2kB ...
        scan_rate                  (azimuth) float32 2kB ...
        DBZ                        (azimuth, range) float32 2MB ...
        VR                         (azimuth, range) float32 2MB ...

xarray.DataTree

'sweep_0'

• Dimensions:
  • sweep: 9
  • azimuth: 483
  • range: 996
• Coordinates: (4)
  • azimuth
    (azimuth)
    float32
    0.0 0.75 1.5 ... 357.8 358.5 359.2

    standard_name :

    beam_azimuth_angle

    units :

    degrees

    array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],
          shape=(483,), dtype=float32)

  • elevation
    (azimuth)
    float32
    ...

    standard_name :

    beam_elevation_angle

    units :

    degrees

    positive :

    up

    [483 values with dtype=float32]

  • time
    (azimuth)
    datetime64[ns]
    2008-06-04T00:15:34 ... 2008-06-...

    standard_name :

    time

    long_name :

    time in seconds since volume start

    comment :

    times are relative to the volume start_time

    array(['2008-06-04T00:15:34.000000000', '2008-06-04T00:15:34.000000000',
           '2008-06-04T00:15:34.000000000', ..., '2008-06-04T00:15:33.000000000',
           '2008-06-04T00:15:33.000000000', '2008-06-04T00:15:34.000000000'],
          shape=(483,), dtype='datetime64[ns]')

  • range
    (range)
    float32
    150.0 300.0 ... 1.492e+05 1.494e+05

    standard_name :

    range_to_center_of_measurement_volume

    long_name :

    Range from instrument to center of gate

    units :

    meters

    spacing_is_constant :

    true

    meters_to_center_of_first_gate :

    150.00000596046448

    meters_between_gates :

    150.00000596046448

    array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
           149250.     , 149400.     ], shape=(996,), dtype=float32)

• Data variables: (18)
  • sweep_number
    ()
    int32
    ...

    standard_name :

    sweep_index_number_0_based

    [1 values with dtype=int32]

  • sweep_mode
    ()
    <U20
    'azimuth_surveillance'

    standard_name :

    scan_mode_for_sweep

    options :

    sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

    array('azimuth_surveillance', dtype='<U20')

  • prt_mode
    ()
    |S32
    ...

    standard_name :

    transmit_pulse_mode

    options :

    fixed, staggered, dual

    meta_group :

    radar_parameters

    [1 values with dtype=|S32]

  • follow_mode
    ()
    |S32
    ...

    standard_name :

    follow_mode_for_scan_strategy

    options :

    none, sun, vehicle, aircraft, target, manual

    meta_group :

    instrument_parameters

    [1 values with dtype=|S32]

  • sweep_fixed_angle
    ()
    float32
    ...

    standard_name :

    beam_target_fixed_angle

    units :

    degrees

    [1 values with dtype=float32]

  • pulse_width
    (azimuth)
    float32
    ...

    standard_name :

    transmitter_pulse_width

    units :

    seconds

    meta_group :

    instrument_parameters

    [483 values with dtype=float32]

  • prt
    (azimuth)
    float32
    ...

    standard_name :

    pulse_repetition_frequency

    units :

    seconds

    meta_group :

    instrument_parameters

    [483 values with dtype=float32]

  • prt_ratio
    (azimuth)
    float32
    ...

    standard_name :

    pulse_repetition_frequency_ratio

    units :

    seconds

    meta_group :

    instrument_parameters

    [483 values with dtype=float32]

  • nyquist_velocity
    (azimuth)
    float32
    ...

    standard_name :

    unambiguous_doppler_velocity

    units :

    meters per second

    meta_group :

    instrument_parameters

    [483 values with dtype=float32]

  • unambiguous_range
    (azimuth)
    float32
    ...

    standard_name :

    unambiguous_range

    units :

    meters

    meta_group :

    instrument_parameters

    [483 values with dtype=float32]

  • antenna_transition
    (azimuth)
    int8
    ...

    standard_name :

    antenna_is_in_transition_between_sweeps

    comment :

    1 if antenna is in transition, 0 otherwise

    [483 values with dtype=int8]

  • n_samples
    (azimuth)
    int32
    ...

    standard_name :

    number_of_samples_used_to_compute_moments

    meta_group :

    instrument_parameters

    [483 values with dtype=int32]

  • r_calib_index
    (azimuth)
    int8
    ...

    standard_name :

    calibration_data_array_index_per_ray

    meta_group :

    radar_calibration

    comment :

    This is the index for the calibration which applies to this ray

    [483 values with dtype=int8]

  • measured_transmit_power_h
    (azimuth)
    float32
    ...

    standard_name :

    measured_radar_transmit_power_h_channel

    units :

    dBm

    meta_group :

    radar_parameters

    [483 values with dtype=float32]

  • measured_transmit_power_v
    (azimuth)
    float32
    ...

    standard_name :

    measured_radar_transmit_power_v_channel

    units :

    dBm

    meta_group :

    radar_parameters

    [483 values with dtype=float32]

  • scan_rate
    (azimuth)
    float32
    ...

    standard_name :

    antenna_angle_scan_rate

    units :

    degrees per second

    meta_group :

    instrument_parameters

    [483 values with dtype=float32]

  • DBZ
    (azimuth, range)
    float32
    ...

    long_name :

    Computed Horizontal Co-polar Reflectivit

    standard_name :

    equivalent_reflectivity_factor

    units :

    dBZ

    threshold_field_name :

    threshold_value :

    -9999.0

    sampling_ratio :

    1.0

    grid_mapping :

    grid_mapping

    [481068 values with dtype=float32]

  • VR
    (azimuth, range)
    float32
    ...

    long_name :

    Computed Velocity

    standard_name :

    radial_velocity_of_scatterers_away_from_instrument

    units :

    m/s

    threshold_field_name :

    threshold_value :

    -9999.0

    sampling_ratio :

    1.0

    grid_mapping :

    grid_mapping

    [481068 values with dtype=float32]

Georeferencing

sweep_mode is assigned coordinate, as we need it available on the DataArray.

swp = vol["sweep_0"].to_dataset(inherit="all_coords")
swp = swp.assign_coords(sweep_mode=swp.sweep_mode)
swp = swp.wrl.georef.georeference()
display(swp)

<xarray.Dataset> Size: 23MB
Dimensions:                    (azimuth: 483, range: 996)
Coordinates: (12/15)
  * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
    elevation                  (azimuth) float32 2kB 0.5164 0.5219 ... 0.5219
    time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:15:...
  * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    x                          (azimuth, range) float64 4MB -6.556e-06 ... -1...
    y                          (azimuth, range) float64 4MB 150.0 ... 1.493e+05
    ...                         ...
    bins                       (azimuth, range) float32 2MB 150.0 ... 1.494e+05
    sweep_mode                 <U20 80B 'azimuth_surveillance'
    latitude                   float64 8B 22.53
    longitude                  float64 8B 120.4
    altitude                   float64 8B 45.0
    crs_wkt                    int64 8B 0
Data variables: (12/17)
    sweep_number               int32 4B ...
    prt_mode                   |S32 32B ...
    follow_mode                |S32 32B ...
    sweep_fixed_angle          float32 4B ...
    pulse_width                (azimuth) float32 2kB ...
    prt                        (azimuth) float32 2kB ...
    ...                         ...
    r_calib_index              (azimuth) int8 483B ...
    measured_transmit_power_h  (azimuth) float32 2kB ...
    measured_transmit_power_v  (azimuth) float32 2kB ...
    scan_rate                  (azimuth) float32 2kB ...
    DBZ                        (azimuth, range) float32 2MB ...
    VR                         (azimuth, range) float32 2MB ...

xarray.Dataset

• Dimensions:
  • azimuth: 483
  • range: 996
• Coordinates: (15)
  • azimuth
    (azimuth)
    float32
    0.0 0.75 1.5 ... 357.8 358.5 359.2

    standard_name :

    beam_azimuth_angle

    units :

    degrees

    array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],
          shape=(483,), dtype=float32)

  • elevation
    (azimuth)
    float32
    0.5164 0.5219 ... 0.5219 0.5219

    standard_name :

    beam_elevation_angle

    units :

    degrees

    positive :

    up

    array([0.5164, 0.5219, 0.5164, ..., 0.5219, 0.5219, 0.5219],
          shape=(483,), dtype=float32)

  • time
    (azimuth)
    datetime64[ns]
    2008-06-04T00:15:34 ... 2008-06-...

    standard_name :

    time

    long_name :

    time in seconds since volume start

    comment :

    times are relative to the volume start_time

    array(['2008-06-04T00:15:34.000000000', '2008-06-04T00:15:34.000000000',
           '2008-06-04T00:15:34.000000000', ..., '2008-06-04T00:15:33.000000000',
           '2008-06-04T00:15:33.000000000', '2008-06-04T00:15:34.000000000'],
          shape=(483,), dtype='datetime64[ns]')

  • range
    (range)
    float32
    150.0 300.0 ... 1.492e+05 1.494e+05

    standard_name :

    range_to_center_of_measurement_volume

    long_name :

    Range from instrument to center of gate

    units :

    meters

    spacing_is_constant :

    true

    meters_to_center_of_first_gate :

    150.00000596046448

    meters_between_gates :

    150.00000596046448

    array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
           149250.     , 149400.     ], shape=(996,), dtype=float32)

  • x
    (azimuth, range)
    float64
    -6.556e-06 ... -1.955e+03

    axis :

    X

    long_name :

    Easting

    standard_name :

    projection_x_coordinate

    units :

    metre

    array([[-6.55640636e-06, -1.31128106e-05, -1.96692135e-05, ...,
            -6.51537112e-03, -6.52192302e-03, -6.52847560e-03],
           [ 1.96334738e+00,  3.92669413e+00,  5.89004065e+00, ...,
             1.95105585e+03,  1.95301805e+03,  1.95498004e+03],
           [ 3.92636842e+00,  7.85273558e+00,  1.17791019e+01, ...,
             3.90179406e+03,  3.90571773e+03,  3.90964180e+03],
           ...,
           [-5.88869664e+00, -1.17773914e+01, -1.76660854e+01, ...,
            -5.85183046e+03, -5.85771571e+03, -5.86360034e+03],
           [-3.92633408e+00, -7.85266690e+00, -1.17789992e+01, ...,
            -3.90175327e+03, -3.90567731e+03, -3.90960093e+03],
           [-1.96337001e+00, -3.92673939e+00, -5.89010854e+00, ...,
            -1.95107834e+03, -1.95304056e+03, -1.95500257e+03]],
          shape=(483, 996))

  • y
    (azimuth, range)
    float64
    150.0 300.0 ... 1.492e+05 1.493e+05

    axis :

    Y

    long_name :

    Northing

    standard_name :

    projection_y_coordinate

    units :

    metre

    array([[   149.99309379,    299.98613978,    449.97915313, ...,
            149054.31688507, 149204.20687851, 149354.11235597],
           [   149.98010903,    299.96016976,    449.94021259, ...,
            149041.15869555, 149191.05096711, 149340.92747867],
           [   149.94169609,    299.8833444 ,    449.82496008, ...,
            149003.24087414, 149153.07950521, 149302.933615  ],
           ...,
           [   149.87731373,    299.75457918,    449.63182676, ...,
            148939.00694196, 149088.79647842, 149238.57026568],
           [   149.94155856,    299.88306882,    449.8245612 , ...,
            149002.84956687, 149152.70331054, 149302.54129825],
           [   149.98010903,    299.96016976,    449.94021259, ...,
            149041.15869555, 149191.05096711, 149340.92747867]],
          shape=(483, 996))

  • z
    (azimuth, range)
    float64
    46.35 47.71 ... 2.714e+03 2.718e+03

    standard_name :

    height_above_ground

    units :

    metre

    array([[  46.35323887,   47.70912277,   49.06765376, ..., 2696.07235407,
            2700.05552534, 2704.0412238 ],
           [  46.3676373 ,   47.73791963,   49.11084905, ..., 2710.37992234,
            2714.37748081, 2718.37756647],
           [  46.35323887,   47.70912277,   49.06765376, ..., 2696.07235407,
            2700.05552534, 2704.0412238 ],
           ...,
           [  46.3676373 ,   47.73791963,   49.11084905, ..., 2710.37992234,
            2714.37748081, 2718.37756647],
           [  46.3676373 ,   47.73791963,   49.11084905, ..., 2710.37992234,
            2714.37748081, 2718.37756647],
           [  46.3676373 ,   47.73791963,   49.11084905, ..., 2710.37992234,
            2714.37748081, 2718.37756647]], shape=(483, 996))

  • gr
    (azimuth, range)
    float64
    150.5 300.5 ... 1.492e+05 1.494e+05

    standard_name :

    distance_from_radar

    units :

    metre

    array([[   150.49229599,    300.48431224,    450.47698158, ...,
            149054.81402644, 149204.70401989, 149354.60949734],
           [   150.48183866,    300.47370289,    450.46624631, ...,
            149054.41529448, 149204.32040878, 149354.20976172],
           [   150.47156784,    300.46355166,    450.45621111, ...,
            149054.79459066, 149204.68458547, 149354.5900643 ],
           ...,
           [   150.52260292,    300.51452999,    450.50709008, ...,
            149054.44984444, 149204.35495235, 149354.24429889],
           [   150.51254587,    300.50445922,    450.49701733, ...,
            149054.4436029 , 149204.34871468, 149354.2380651 ],
           [   150.50239907,    300.49429783,    450.48685294, ...,
            149054.43621732, 149204.34133191, 149354.23068515]],
          shape=(483, 996))

  • rays
    (azimuth, range)
    float32
    0.0 0.0 0.0 ... 359.2 359.2 359.2

    standard_name :

    beam_azimuth_angle

    units :

    degrees

    array([[  0.  ,   0.  ,   0.  , ...,   0.  ,   0.  ,   0.  ],
           [  0.75,   0.75,   0.75, ...,   0.75,   0.75,   0.75],
           [  1.5 ,   1.5 ,   1.5 , ...,   1.5 ,   1.5 ,   1.5 ],
           ...,
           [357.75, 357.75, 357.75, ..., 357.75, 357.75, 357.75],
           [358.5 , 358.5 , 358.5 , ..., 358.5 , 358.5 , 358.5 ],
           [359.25, 359.25, 359.25, ..., 359.25, 359.25, 359.25]],
          shape=(483, 996), dtype=float32)

  • bins
    (azimuth, range)
    float32
    150.0 300.0 ... 1.492e+05 1.494e+05

    standard_name :

    range_to_center_of_measurement_volume

    long_name :

    Range from instrument to center of gate

    units :

    meters

    spacing_is_constant :

    true

    meters_to_center_of_first_gate :

    150.00000596046448

    meters_between_gates :

    150.00000596046448

    array([[   150.     ,    300.     ,    450.00003, ..., 149100.     ,
            149250.     , 149400.     ],
           [   150.     ,    300.     ,    450.00003, ..., 149100.     ,
            149250.     , 149400.     ],
           [   150.     ,    300.     ,    450.00003, ..., 149100.     ,
            149250.     , 149400.     ],
           ...,
           [   150.     ,    300.     ,    450.00003, ..., 149100.     ,
            149250.     , 149400.     ],
           [   150.     ,    300.     ,    450.00003, ..., 149100.     ,
            149250.     , 149400.     ],
           [   150.     ,    300.     ,    450.00003, ..., 149100.     ,
            149250.     , 149400.     ]], shape=(483, 996), dtype=float32)

  • sweep_mode
    ()
    <U20
    'azimuth_surveillance'

    standard_name :

    scan_mode_for_sweep

    options :

    sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

    array('azimuth_surveillance', dtype='<U20')

  • latitude
    ()
    float64
    22.53

    standard_name :

    latitude

    units :

    degrees_north

    array(22.526699)

  • longitude
    ()
    float64
    120.4

    standard_name :

    longitude

    units :

    degrees_east

    array(120.433502)

  • altitude
    ()
    float64
    45.0

    standard_name :

    altitude

    units :

    meters

    positive :

    up

    array(45.000002)

  • crs_wkt
    ()
    int64
    0

    crs_wkt :

    PROJCRS["AEQD centered at 22.52669906616211N 120.43350219726562E",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Azimuthal Equidistant",ID["EPSG",1125]],PARAMETER["Latitude of natural origin",22.526699,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]

    semi_major_axis :

    6378137.0

    semi_minor_axis :

    6356752.314245179

    inverse_flattening :

    298.257223563

    reference_ellipsoid_name :

    WGS 84

    longitude_of_prime_meridian :

    0.0

    prime_meridian_name :

    Greenwich

    geographic_crs_name :

    unknown

    horizontal_datum_name :

    World Geodetic System 1984

    projected_crs_name :

    AEQD centered at 22.52669906616211N 120.43350219726562E

    grid_mapping_name :

    azimuthal_equidistant

    latitude_of_projection_origin :

    22.526699

    longitude_of_projection_origin :

    120.433502

    false_easting :

    0.0

    false_northing :

    0.0

    array(0)

• Data variables: (17)
  • sweep_number
    ()
    int32
    ...

    standard_name :

    sweep_index_number_0_based

    [1 values with dtype=int32]

  • prt_mode
    ()
    |S32
    ...

    standard_name :

    transmit_pulse_mode

    options :

    fixed, staggered, dual

    meta_group :

    radar_parameters

    [1 values with dtype=|S32]

  • follow_mode
    ()
    |S32
    ...

    standard_name :

    follow_mode_for_scan_strategy

    options :

    none, sun, vehicle, aircraft, target, manual

    meta_group :

    instrument_parameters

    [1 values with dtype=|S32]

  • sweep_fixed_angle
    ()
    float32
    ...

    standard_name :

    beam_target_fixed_angle

    units :

    degrees

    [1 values with dtype=float32]

  • pulse_width
    (azimuth)
    float32
    ...

    standard_name :

    transmitter_pulse_width

    units :

    seconds

    meta_group :

    instrument_parameters

    [483 values with dtype=float32]

  • prt
    (azimuth)
    float32
    ...

    standard_name :

    pulse_repetition_frequency

    units :

    seconds

    meta_group :

    instrument_parameters

    [483 values with dtype=float32]

  • prt_ratio
    (azimuth)
    float32
    ...

    standard_name :

    pulse_repetition_frequency_ratio

    units :

    seconds

    meta_group :

    instrument_parameters

    [483 values with dtype=float32]

  • nyquist_velocity
    (azimuth)
    float32
    ...

    standard_name :

    unambiguous_doppler_velocity

    units :

    meters per second

    meta_group :

    instrument_parameters

    [483 values with dtype=float32]

  • unambiguous_range
    (azimuth)
    float32
    ...

    standard_name :

    unambiguous_range

    units :

    meters

    meta_group :

    instrument_parameters

    [483 values with dtype=float32]

  • antenna_transition
    (azimuth)
    int8
    ...

    standard_name :

    antenna_is_in_transition_between_sweeps

    comment :

    1 if antenna is in transition, 0 otherwise

    [483 values with dtype=int8]

  • n_samples
    (azimuth)
    int32
    ...

    standard_name :

    number_of_samples_used_to_compute_moments

    meta_group :

    instrument_parameters

    [483 values with dtype=int32]

  • r_calib_index
    (azimuth)
    int8
    ...

    standard_name :

    calibration_data_array_index_per_ray

    meta_group :

    radar_calibration

    comment :

    This is the index for the calibration which applies to this ray

    [483 values with dtype=int8]

  • measured_transmit_power_h
    (azimuth)
    float32
    ...

    standard_name :

    measured_radar_transmit_power_h_channel

    units :

    dBm

    meta_group :

    radar_parameters

    [483 values with dtype=float32]

  • measured_transmit_power_v
    (azimuth)
    float32
    ...

    standard_name :

    measured_radar_transmit_power_v_channel

    units :

    dBm

    meta_group :

    radar_parameters

    [483 values with dtype=float32]

  • scan_rate
    (azimuth)
    float32
    ...

    standard_name :

    antenna_angle_scan_rate

    units :

    degrees per second

    meta_group :

    instrument_parameters

    [483 values with dtype=float32]

  • DBZ
    (azimuth, range)
    float32
    ...

    long_name :

    Computed Horizontal Co-polar Reflectivit

    standard_name :

    equivalent_reflectivity_factor

    units :

    dBZ

    threshold_field_name :

    threshold_value :

    -9999.0

    sampling_ratio :

    1.0

    grid_mapping :

    grid_mapping

    [481068 values with dtype=float32]

  • VR
    (azimuth, range)
    float32
    ...

    long_name :

    Computed Velocity

    standard_name :

    radial_velocity_of_scatterers_away_from_instrument

    units :

    m/s

    threshold_field_name :

    threshold_value :

    -9999.0

    sampling_ratio :

    1.0

    grid_mapping :

    grid_mapping

    [481068 values with dtype=float32]

Inspect radar moments

The DataArrays can be accessed by key or by attribute. Each DataArray has dimensions and coordinates of its parent dataset. There are attributes connected which are defined by Cf/Radial standard.

display(swp.DBZ)

<xarray.DataArray 'DBZ' (azimuth: 483, range: 996)> Size: 2MB
[481068 values with dtype=float32]
Coordinates: (12/15)
  * azimuth     (azimuth) float32 2kB 0.0 0.75 1.5 2.25 ... 357.8 358.5 359.2
    elevation   (azimuth) float32 2kB 0.5164 0.5219 0.5164 ... 0.5219 0.5219
    time        (azimuth) datetime64[ns] 4kB 2008-06-04T00:15:34 ... 2008-06-...
  * range       (range) float32 4kB 150.0 300.0 450.0 ... 1.492e+05 1.494e+05
    x           (azimuth, range) float64 4MB -6.556e-06 ... -1.955e+03
    y           (azimuth, range) float64 4MB 150.0 300.0 ... 1.492e+05 1.493e+05
    ...          ...
    bins        (azimuth, range) float32 2MB 150.0 300.0 ... 1.492e+05 1.494e+05
    sweep_mode  <U20 80B 'azimuth_surveillance'
    latitude    float64 8B 22.53
    longitude   float64 8B 120.4
    altitude    float64 8B 45.0
    crs_wkt     int64 8B 0
Attributes:
    long_name:             Computed Horizontal Co-polar Reflectivit
    standard_name:         equivalent_reflectivity_factor
    units:                 dBZ
    threshold_field_name:  
    threshold_value:       -9999.0
    sampling_ratio:        1.0
    grid_mapping:          grid_mapping

xarray.DataArray

'DBZ'

• azimuth: 483
• range: 996

• ...

  [481068 values with dtype=float32]

• Coordinates: (15)
  • azimuth
    (azimuth)
    float32
    0.0 0.75 1.5 ... 357.8 358.5 359.2

    standard_name :

    beam_azimuth_angle

    units :

    degrees

    array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],
          shape=(483,), dtype=float32)

  • elevation
    (azimuth)
    float32
    0.5164 0.5219 ... 0.5219 0.5219

    standard_name :

    beam_elevation_angle

    units :

    degrees

    positive :

    up

    array([0.5164, 0.5219, 0.5164, ..., 0.5219, 0.5219, 0.5219],
          shape=(483,), dtype=float32)

  • time
    (azimuth)
    datetime64[ns]
    2008-06-04T00:15:34 ... 2008-06-...

    standard_name :

    time

    long_name :

    time in seconds since volume start

    comment :

    times are relative to the volume start_time

    array(['2008-06-04T00:15:34.000000000', '2008-06-04T00:15:34.000000000',
           '2008-06-04T00:15:34.000000000', ..., '2008-06-04T00:15:33.000000000',
           '2008-06-04T00:15:33.000000000', '2008-06-04T00:15:34.000000000'],
          shape=(483,), dtype='datetime64[ns]')

  • range
    (range)
    float32
    150.0 300.0 ... 1.492e+05 1.494e+05

    standard_name :

    range_to_center_of_measurement_volume

    long_name :

    Range from instrument to center of gate

    units :

    meters

    spacing_is_constant :

    true

    meters_to_center_of_first_gate :

    150.00000596046448

    meters_between_gates :

    150.00000596046448

    array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
           149250.     , 149400.     ], shape=(996,), dtype=float32)

  • x
    (azimuth, range)
    float64
    -6.556e-06 ... -1.955e+03

    axis :

    X

    long_name :

    Easting

    standard_name :

    projection_x_coordinate

    units :

    metre

    array([[-6.55640636e-06, -1.31128106e-05, -1.96692135e-05, ...,
            -6.51537112e-03, -6.52192302e-03, -6.52847560e-03],
           [ 1.96334738e+00,  3.92669413e+00,  5.89004065e+00, ...,
             1.95105585e+03,  1.95301805e+03,  1.95498004e+03],
           [ 3.92636842e+00,  7.85273558e+00,  1.17791019e+01, ...,
             3.90179406e+03,  3.90571773e+03,  3.90964180e+03],
           ...,
           [-5.88869664e+00, -1.17773914e+01, -1.76660854e+01, ...,
            -5.85183046e+03, -5.85771571e+03, -5.86360034e+03],
           [-3.92633408e+00, -7.85266690e+00, -1.17789992e+01, ...,
            -3.90175327e+03, -3.90567731e+03, -3.90960093e+03],
           [-1.96337001e+00, -3.92673939e+00, -5.89010854e+00, ...,
            -1.95107834e+03, -1.95304056e+03, -1.95500257e+03]],
          shape=(483, 996))

  • y
    (azimuth, range)
    float64
    150.0 300.0 ... 1.492e+05 1.493e+05

    axis :

    Y

    long_name :

    Northing

    standard_name :

    projection_y_coordinate

    units :

    metre

    array([[   149.99309379,    299.98613978,    449.97915313, ...,
            149054.31688507, 149204.20687851, 149354.11235597],
           [   149.98010903,    299.96016976,    449.94021259, ...,
            149041.15869555, 149191.05096711, 149340.92747867],
           [   149.94169609,    299.8833444 ,    449.82496008, ...,
            149003.24087414, 149153.07950521, 149302.933615  ],
           ...,
           [   149.87731373,    299.75457918,    449.63182676, ...,
            148939.00694196, 149088.79647842, 149238.57026568],
           [   149.94155856,    299.88306882,    449.8245612 , ...,
            149002.84956687, 149152.70331054, 149302.54129825],
           [   149.98010903,    299.96016976,    449.94021259, ...,
            149041.15869555, 149191.05096711, 149340.92747867]],
          shape=(483, 996))

  • z
    (azimuth, range)
    float64
    46.35 47.71 ... 2.714e+03 2.718e+03

    standard_name :

    height_above_ground

    units :

    metre

    array([[  46.35323887,   47.70912277,   49.06765376, ..., 2696.07235407,
            2700.05552534, 2704.0412238 ],
           [  46.3676373 ,   47.73791963,   49.11084905, ..., 2710.37992234,
            2714.37748081, 2718.37756647],
           [  46.35323887,   47.70912277,   49.06765376, ..., 2696.07235407,
            2700.05552534, 2704.0412238 ],
           ...,
           [  46.3676373 ,   47.73791963,   49.11084905, ..., 2710.37992234,
            2714.37748081, 2718.37756647],
           [  46.3676373 ,   47.73791963,   49.11084905, ..., 2710.37992234,
            2714.37748081, 2718.37756647],
           [  46.3676373 ,   47.73791963,   49.11084905, ..., 2710.37992234,
            2714.37748081, 2718.37756647]], shape=(483, 996))

  • gr
    (azimuth, range)
    float64
    150.5 300.5 ... 1.492e+05 1.494e+05

    standard_name :

    distance_from_radar

    units :

    metre

    array([[   150.49229599,    300.48431224,    450.47698158, ...,
            149054.81402644, 149204.70401989, 149354.60949734],
           [   150.48183866,    300.47370289,    450.46624631, ...,
            149054.41529448, 149204.32040878, 149354.20976172],
           [   150.47156784,    300.46355166,    450.45621111, ...,
            149054.79459066, 149204.68458547, 149354.5900643 ],
           ...,
           [   150.52260292,    300.51452999,    450.50709008, ...,
            149054.44984444, 149204.35495235, 149354.24429889],
           [   150.51254587,    300.50445922,    450.49701733, ...,
            149054.4436029 , 149204.34871468, 149354.2380651 ],
           [   150.50239907,    300.49429783,    450.48685294, ...,
            149054.43621732, 149204.34133191, 149354.23068515]],
          shape=(483, 996))

  • rays
    (azimuth, range)
    float32
    0.0 0.0 0.0 ... 359.2 359.2 359.2

    standard_name :

    beam_azimuth_angle

    units :

    degrees

    array([[  0.  ,   0.  ,   0.  , ...,   0.  ,   0.  ,   0.  ],
           [  0.75,   0.75,   0.75, ...,   0.75,   0.75,   0.75],
           [  1.5 ,   1.5 ,   1.5 , ...,   1.5 ,   1.5 ,   1.5 ],
           ...,
           [357.75, 357.75, 357.75, ..., 357.75, 357.75, 357.75],
           [358.5 , 358.5 , 358.5 , ..., 358.5 , 358.5 , 358.5 ],
           [359.25, 359.25, 359.25, ..., 359.25, 359.25, 359.25]],
          shape=(483, 996), dtype=float32)

  • bins
    (azimuth, range)
    float32
    150.0 300.0 ... 1.492e+05 1.494e+05

    standard_name :

    range_to_center_of_measurement_volume

    long_name :

    Range from instrument to center of gate

    units :

    meters

    spacing_is_constant :

    true

    meters_to_center_of_first_gate :

    150.00000596046448

    meters_between_gates :

    150.00000596046448

    array([[   150.     ,    300.     ,    450.00003, ..., 149100.     ,
            149250.     , 149400.     ],
           [   150.     ,    300.     ,    450.00003, ..., 149100.     ,
            149250.     , 149400.     ],
           [   150.     ,    300.     ,    450.00003, ..., 149100.     ,
            149250.     , 149400.     ],
           ...,
           [   150.     ,    300.     ,    450.00003, ..., 149100.     ,
            149250.     , 149400.     ],
           [   150.     ,    300.     ,    450.00003, ..., 149100.     ,
            149250.     , 149400.     ],
           [   150.     ,    300.     ,    450.00003, ..., 149100.     ,
            149250.     , 149400.     ]], shape=(483, 996), dtype=float32)

  • sweep_mode
    ()
    <U20
    'azimuth_surveillance'

    standard_name :

    scan_mode_for_sweep

    options :

    sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

    array('azimuth_surveillance', dtype='<U20')

  • latitude
    ()
    float64
    22.53

    standard_name :

    latitude

    units :

    degrees_north

    array(22.526699)

  • longitude
    ()
    float64
    120.4

    standard_name :

    longitude

    units :

    degrees_east

    array(120.433502)

  • altitude
    ()
    float64
    45.0

    standard_name :

    altitude

    units :

    meters

    positive :

    up

    array(45.000002)

  • crs_wkt
    ()
    int64
    0

    crs_wkt :

    PROJCRS["AEQD centered at 22.52669906616211N 120.43350219726562E",BASEGEOGCRS["unknown",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]],ID["EPSG",6326]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8901]]],CONVERSION["unknown",METHOD["Azimuthal Equidistant",ID["EPSG",1125]],PARAMETER["Latitude of natural origin",22.526699,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",120.433502,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]

    semi_major_axis :

    6378137.0

    semi_minor_axis :

    6356752.314245179

    inverse_flattening :

    298.257223563

    reference_ellipsoid_name :

    WGS 84

    longitude_of_prime_meridian :

    0.0

    prime_meridian_name :

    Greenwich

    geographic_crs_name :

    unknown

    horizontal_datum_name :

    World Geodetic System 1984

    projected_crs_name :

    AEQD centered at 22.52669906616211N 120.43350219726562E

    grid_mapping_name :

    azimuthal_equidistant

    latitude_of_projection_origin :

    22.526699

    longitude_of_projection_origin :

    120.433502

    false_easting :

    0.0

    false_northing :

    0.0

    array(0)

• Attributes: (7)

  long_name :

  Computed Horizontal Co-polar Reflectivit

  standard_name :

  equivalent_reflectivity_factor

  units :

  dBZ

  threshold_field_name :

  threshold_value :

  -9999.0

  sampling_ratio :

  1.0

  grid_mapping :

  grid_mapping

Create simple plot

Using xarray features a simple plot can be created like this. Note the sortby('time') method, which sorts the radials by time.

For more details on plotting radar data see under Visualization.

swp.DBZ.sortby("time").plot(x="range", y="time", add_labels=False)

<matplotlib.collections.QuadMesh at 0x72db00af4d70>

fig = plt.figure(figsize=(5, 5))
pm = swp.DBZ.wrl.vis.plot(crs={"latmin": 3e3}, fig=fig)

Use xr.open_dataset to retrieve explicit group

Warning

Since \(\omega radlib\) version 2.0 all xarray backend related functionality is imported from xradar-package.

swp_b = xr.open_dataset(
    f, engine="cfradial1", group="sweep_1", backend_kwargs=dict(reindex_angle=False)
)
display(swp_b)

<xarray.Dataset> Size: 4MB
Dimensions:                    (azimuth: 483, range: 996)
Coordinates:
  * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
    elevation                  (azimuth) float32 2kB ...
    time                       (azimuth) datetime64[ns] 4kB ...
  * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
    latitude                   float64 8B ...
    longitude                  float64 8B ...
    altitude                   float64 8B ...
Data variables: (12/18)
    sweep_number               int32 4B ...
    sweep_mode                 <U20 80B ...
    prt_mode                   |S32 32B ...
    follow_mode                |S32 32B ...
    sweep_fixed_angle          float32 4B ...
    pulse_width                (azimuth) float32 2kB ...
    ...                         ...
    r_calib_index              (azimuth) int8 483B ...
    measured_transmit_power_h  (azimuth) float32 2kB ...
    measured_transmit_power_v  (azimuth) float32 2kB ...
    scan_rate                  (azimuth) float32 2kB ...
    DBZ                        (azimuth, range) float32 2MB ...
    VR                         (azimuth, range) float32 2MB ...

xarray.Dataset

• Dimensions:
  • azimuth: 483
  • range: 996
• Coordinates: (7)
  • azimuth
    (azimuth)
    float32
    0.0 0.75 1.5 ... 357.8 358.5 359.2

    standard_name :

    beam_azimuth_angle

    units :

    degrees

    array([  0.  ,   0.75,   1.5 , ..., 357.75, 358.5 , 359.25],
          shape=(483,), dtype=float32)

  • elevation
    (azimuth)
    float32
    ...

    standard_name :

    beam_elevation_angle

    units :

    degrees

    positive :

    up

    [483 values with dtype=float32]

  • time
    (azimuth)
    datetime64[ns]
    ...

    standard_name :

    time

    long_name :

    time in seconds since volume start

    comment :

    times are relative to the volume start_time

    [483 values with dtype=datetime64[ns]]

  • range
    (range)
    float32
    150.0 300.0 ... 1.492e+05 1.494e+05

    standard_name :

    range_to_center_of_measurement_volume

    long_name :

    Range from instrument to center of gate

    units :

    meters

    spacing_is_constant :

    true

    meters_to_center_of_first_gate :

    150.00000596046448

    meters_between_gates :

    150.00000596046448

    array([   150.     ,    300.     ,    450.00003, ..., 149100.     ,
           149250.     , 149400.     ], shape=(996,), dtype=float32)

  • latitude
    ()
    float64
    ...

    standard_name :

    latitude

    units :

    degrees_north

    [1 values with dtype=float64]

  • longitude
    ()
    float64
    ...

    standard_name :

    longitude

    units :

    degrees_east

    [1 values with dtype=float64]

  • altitude
    ()
    float64
    ...

    standard_name :

    altitude

    units :

    meters

    positive :

    up

    [1 values with dtype=float64]

• Data variables: (18)
  • sweep_number
    ()
    int32
    ...

    standard_name :

    sweep_index_number_0_based

    [1 values with dtype=int32]

  • sweep_mode
    ()
    <U20
    ...

    standard_name :

    scan_mode_for_sweep

    options :

    sector, coplane, rhi, vertical_pointing, idle, azimuth_surveillance, elevation_surveillance, sunscan, pointing, calibration, manual_ppi, manual_rhi

    [1 values with dtype=<U20]

  • prt_mode
    ()
    |S32
    ...

    standard_name :

    transmit_pulse_mode

    options :

    fixed, staggered, dual

    meta_group :

    radar_parameters

    [1 values with dtype=|S32]

  • follow_mode
    ()
    |S32
    ...

    standard_name :

    follow_mode_for_scan_strategy

    options :

    none, sun, vehicle, aircraft, target, manual

    meta_group :

    instrument_parameters

    [1 values with dtype=|S32]

  • sweep_fixed_angle
    ()
    float32
    ...

    standard_name :

    beam_target_fixed_angle

    units :

    degrees

    [1 values with dtype=float32]

  • pulse_width
    (azimuth)
    float32
    ...

    standard_name :

    transmitter_pulse_width

    units :

    seconds

    meta_group :

    instrument_parameters

    [483 values with dtype=float32]

  • prt
    (azimuth)
    float32
    ...

    standard_name :

    pulse_repetition_frequency

    units :

    seconds

    meta_group :

    instrument_parameters

    [483 values with dtype=float32]

  • prt_ratio
    (azimuth)
    float32
    ...

    standard_name :

    pulse_repetition_frequency_ratio

    units :

    seconds

    meta_group :

    instrument_parameters

    [483 values with dtype=float32]

  • nyquist_velocity
    (azimuth)
    float32
    ...

    standard_name :

    unambiguous_doppler_velocity

    units :

    meters per second

    meta_group :

    instrument_parameters

    [483 values with dtype=float32]

  • unambiguous_range
    (azimuth)
    float32
    ...

    standard_name :

    unambiguous_range

    units :

    meters

    meta_group :

    instrument_parameters

    [483 values with dtype=float32]

  • antenna_transition
    (azimuth)
    int8
    ...

    standard_name :

    antenna_is_in_transition_between_sweeps

    comment :

    1 if antenna is in transition, 0 otherwise

    [483 values with dtype=int8]

  • n_samples
    (azimuth)
    int32
    ...

    standard_name :

    number_of_samples_used_to_compute_moments

    meta_group :

    instrument_parameters

    [483 values with dtype=int32]

  • r_calib_index
    (azimuth)
    int8
    ...

    standard_name :

    calibration_data_array_index_per_ray

    meta_group :

    radar_calibration

    comment :

    This is the index for the calibration which applies to this ray

    [483 values with dtype=int8]

  • measured_transmit_power_h
    (azimuth)
    float32
    ...

    standard_name :

    measured_radar_transmit_power_h_channel

    units :

    dBm

    meta_group :

    radar_parameters

    [483 values with dtype=float32]

  • measured_transmit_power_v
    (azimuth)
    float32
    ...

    standard_name :

    measured_radar_transmit_power_v_channel

    units :

    dBm

    meta_group :

    radar_parameters

    [483 values with dtype=float32]

  • scan_rate
    (azimuth)
    float32
    ...

    standard_name :

    antenna_angle_scan_rate

    units :

    degrees per second

    meta_group :

    instrument_parameters

    [483 values with dtype=float32]

  • DBZ
    (azimuth, range)
    float32
    ...

    long_name :

    Computed Horizontal Co-polar Reflectivit

    standard_name :

    equivalent_reflectivity_factor

    units :

    dBZ

    threshold_field_name :

    threshold_value :

    -9999.0

    sampling_ratio :

    1.0

    grid_mapping :

    grid_mapping

    [481068 values with dtype=float32]

  • VR
    (azimuth, range)
    float32
    ...

    long_name :

    Computed Velocity

    standard_name :

    radial_velocity_of_scatterers_away_from_instrument

    units :

    m/s

    threshold_field_name :

    threshold_value :

    -9999.0

    sampling_ratio :

    1.0

    grid_mapping :

    grid_mapping

    [481068 values with dtype=float32]