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.

[1]:

import wradlib as wrl
import warnings

warnings.filterwarnings("ignore")
import matplotlib.pyplot as plt
import numpy as np
import xradar as xd
import xarray as xr

try:
    get_ipython().run_line_magic("matplotlib inline")
except:
    plt.ion()

Load CfRadial1 Volume Data#

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

[2]:

fpath = "netcdf/cfrad.20080604_002217_000_SPOL_v36_SUR.nc"
f = wrl.util.get_wradlib_data_file(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/pooch/data/netcdf/cfrad.20080604_002217_000_SPOL_v36_SUR.nc' to '/home/runner/work/wradlib-notebooks/wradlib-notebooks/wradlib-data'.

Inspect RadarVolume#

[3]:

display(vol)

<xarray.DatasetView> Size: 477B
Dimensions:              (sweep: 9)
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 ...
    latitude             float64 8B ...
    longitude            float64 8B ...
    altitude             float64 8B ...
    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

xarray.DataTree

Groups: (12)
<xarray.DatasetView> Size: 4MB Dimensions: (sweep: 9, azimuth: 483, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:15:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 elevation (azimuth) float32 2kB ... latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... 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) timedelta64[ns] 4kB ... ... ... 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 ...
sweep_0
Groups: (0)
Dimensions:
sweep: 9
azimuth: 483
range: 996
Coordinates: (7)
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'], 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. ], dtype=float32)
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], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[483 values with 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
'azimuth_surveillance'
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)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
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]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (sweep: 9, azimuth: 483, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:16:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 elevation (azimuth) float32 2kB ... latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... 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) timedelta64[ns] 4kB ... ... ... 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 ...
sweep_1
Groups: (0)
Dimensions:
sweep: 9
azimuth: 483
range: 996
Coordinates: (7)
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'], 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. ], dtype=float32)
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], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[483 values with 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
'azimuth_surveillance'
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)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
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]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (sweep: 9, azimuth: 482, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:17:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 elevation (azimuth) float32 2kB ... latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... 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) timedelta64[ns] 4kB ... ... ... 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 ...
sweep_2
Groups: (0)
Dimensions:
sweep: 9
azimuth: 482
range: 996
Coordinates: (7)
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'], 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. ], dtype=float32)
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], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[482 values with 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
'azimuth_surveillance'
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)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
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]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (sweep: 9, azimuth: 483, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:17:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 elevation (azimuth) float32 2kB ... latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... 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) timedelta64[ns] 4kB ... ... ... 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 ...
sweep_3
Groups: (0)
Dimensions:
sweep: 9
azimuth: 483
range: 996
Coordinates: (7)
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'], 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. ], dtype=float32)
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], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[483 values with 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
'azimuth_surveillance'
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)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
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]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (sweep: 9, azimuth: 481, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:18:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 elevation (azimuth) float32 2kB ... latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... 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) timedelta64[ns] 4kB ... ... ... 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 ...
sweep_4
Groups: (0)
Dimensions:
sweep: 9
azimuth: 481
range: 996
Coordinates: (7)
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'], 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. ], dtype=float32)
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], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[481 values with 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
'azimuth_surveillance'
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)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[481 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[481 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[481 values with dtype=timedelta64[ns]]
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]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (sweep: 9, azimuth: 482, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:19:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 elevation (azimuth) float32 2kB ... latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... 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) timedelta64[ns] 4kB ... ... ... 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 ...
sweep_5
Groups: (0)
Dimensions:
sweep: 9
azimuth: 482
range: 996
Coordinates: (7)
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'], 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. ], dtype=float32)
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], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[482 values with 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
'azimuth_surveillance'
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)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
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]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (sweep: 9, azimuth: 482, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:20:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 elevation (azimuth) float32 2kB ... latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... 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) timedelta64[ns] 4kB ... ... ... 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 ...
sweep_6
Groups: (0)
Dimensions:
sweep: 9
azimuth: 482
range: 996
Coordinates: (7)
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'], 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. ], dtype=float32)
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], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[482 values with 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
'azimuth_surveillance'
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)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
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]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (sweep: 9, azimuth: 484, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:21:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 elevation (azimuth) float32 2kB ... latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... 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) timedelta64[ns] 4kB ... ... ... 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 ...
sweep_7
Groups: (0)
Dimensions:
sweep: 9
azimuth: 484
range: 996
Coordinates: (7)
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'], 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. ], dtype=float32)
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], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[484 values with 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
'azimuth_surveillance'
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)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[484 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[484 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[484 values with dtype=timedelta64[ns]]
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]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (sweep: 9, azimuth: 483, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:21:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 elevation (azimuth) float32 2kB ... latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... 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) timedelta64[ns] 4kB ... ... ... 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 ...
sweep_8
Groups: (0)
Dimensions:
sweep: 9
azimuth: 483
range: 996
Coordinates: (7)
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'], 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. ], dtype=float32)
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], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[483 values with 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
'azimuth_surveillance'
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)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
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]
Attributes: (0)
<xarray.DatasetView> Size: 20B Dimensions: (sweep: 9) Dimensions without coordinates: sweep Data variables: radar_beam_width_h float32 4B ... radar_antenna_gain_h float32 4B ... radar_antenna_gain_v float32 4B ... radar_beam_width_v float32 4B ... radar_receiver_bandwidth float32 4B ...
radar_parameters
Groups: (0)
Dimensions:
sweep: 9
Coordinates: (0)
Data variables: (5)
radar_beam_width_h
()
float32
...
standard_name :
half_power_radar_beam_width_h_channel
units :
degrees
meta_group :
radar_parameters
[1 values with dtype=float32]
radar_antenna_gain_h
()
float32
...
standard_name :
nominal_radar_antenna_gain_h_channel
units :
dB
meta_group :
radar_parameters
[1 values with dtype=float32]
radar_antenna_gain_v
()
float32
...
standard_name :
nominal_radar_antenna_gain_v_channel
units :
dB
meta_group :
radar_parameters
[1 values with dtype=float32]
radar_beam_width_v
()
float32
...
standard_name :
half_power_radar_beam_width_v_channel
units :
degrees
meta_group :
radar_parameters
[1 values with dtype=float32]
radar_receiver_bandwidth
()
float32
...
standard_name :
radar_receiver_bandwidth
units :
s-1
meta_group :
radar_parameters
[1 values with dtype=float32]
Attributes: (0)
<xarray.DatasetView> Size: 64B Dimensions: (sweep: 9) Dimensions without coordinates: sweep Data variables: (12/16) drift_correction float32 4B ... range_correction float32 4B ... pressure_altitude_correction float32 4B ... longitude_correction float32 4B ... pitch_correction float32 4B ... tilt_correction float32 4B ... ... ... vertical_velocity_correction float32 4B ... rotation_correction float32 4B ... elevation_correction float32 4B ... roll_correction float32 4B ... heading_correction float32 4B ... radar_altitude_correction float32 4B ...
georeferencing_correction
Groups: (0)
Dimensions:
sweep: 9
Coordinates: (0)
Data variables: (16)
drift_correction
()
float32
...
standard_name :
platform_drift_angle_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
range_correction
()
float32
...
standard_name :
range_to_center_of_measurement_volume_correction
units :
meters
meta_group :
geometry_correction
[1 values with dtype=float32]
pressure_altitude_correction
()
float32
...
standard_name :
pressure_altitude_correction
units :
meters
meta_group :
geometry_correction
[1 values with dtype=float32]
longitude_correction
()
float32
...
standard_name :
longitude_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
pitch_correction
()
float32
...
standard_name :
platform_pitch_angle_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
tilt_correction
()
float32
...
standard_name :
beam_tilt_angle_relative_to_platform_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
northward_ground_speed_correction
()
float32
...
standard_name :
platform_northward_velocity_correction
units :
meters per second
meta_group :
geometry_correction
[1 values with dtype=float32]
eastward_ground_speed_correction
()
float32
...
standard_name :
platform_eastward_velocity_correction
units :
meters per second
meta_group :
geometry_correction
[1 values with dtype=float32]
azimuth_correction
()
float32
...
standard_name :
azimuth_angle_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
latitude_correction
()
float32
...
standard_name :
latitude_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
vertical_velocity_correction
()
float32
...
standard_name :
platform_vertical_velocity_correction
units :
meters per second
meta_group :
geometry_correction
[1 values with dtype=float32]
rotation_correction
()
float32
...
standard_name :
beam_rotation_angle_relative_to_platform_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
elevation_correction
()
float32
...
standard_name :
beam_elevation_angle_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
roll_correction
()
float32
...
standard_name :
platform_roll_angle_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
heading_correction
()
float32
...
standard_name :
platform_heading_angle_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
radar_altitude_correction
()
float32
...
standard_name :
altitude_correction
units :
meters
meta_group :
geometry_correction
[1 values with dtype=float32]
Attributes: (0)
<xarray.DatasetView> Size: 212B Dimensions: (sweep: 9) Dimensions without coordinates: sweep Data variables: (12/45) time |S32 32B ... pulse_width timedelta64[ns] 8B ... xmit_power_h float32 4B ... xmit_power_v float32 4B ... two_way_waveguide_loss_h float32 4B ... two_way_waveguide_loss_v float32 4B ... ... ... test_power_h float32 4B ... test_power_v float32 4B ... receiver_slope_hc float32 4B ... receiver_slope_vc float32 4B ... receiver_slope_hx float32 4B ... receiver_slope_vx float32 4B ...
radar_calibration
Groups: (0)
Dimensions:
sweep: 9
Coordinates: (0)
Data variables: (45)
time
()
|S32
...
standard_name :
radar_calibration_time_utc
meta_group :
radar_calibration
[1 values with dtype=|S32]
pulse_width
()
timedelta64[ns]
...
standard_name :
radar_calibration_pulse_width
meta_group :
radar_calibration
[1 values with dtype=timedelta64[ns]]
xmit_power_h
()
float32
...
standard_name :
calibrated_radar_xmit_power_h_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
xmit_power_v
()
float32
...
standard_name :
calibrated_radar_xmit_power_v_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
two_way_waveguide_loss_h
()
float32
...
standard_name :
radar_calibration_two_way_waveguide_loss_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
two_way_waveguide_loss_v
()
float32
...
standard_name :
radar_calibration_two_way_waveguide_loss_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
two_way_radome_loss_h
()
float32
...
standard_name :
radar_calibration_two_way_radome_loss_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
two_way_radome_loss_v
()
float32
...
standard_name :
radar_calibration_two_way_radome_loss_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_mismatch_loss
()
float32
...
standard_name :
radar_calibration_receiver_mismatch_loss
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
radar_constant_h
()
float32
...
standard_name :
calibrated_radar_constant_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
radar_constant_v
()
float32
...
standard_name :
calibrated_radar_constant_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
antenna_gain_h
()
float32
...
standard_name :
calibrated_radar_antenna_gain_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
antenna_gain_v
()
float32
...
standard_name :
calibrated_radar_antenna_gain_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_hc
()
float32
...
standard_name :
calibrated_radar_receiver_noise_h_co_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_vc
()
float32
...
standard_name :
calibrated_radar_receiver_noise_v_co_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_hx
()
float32
...
standard_name :
calibrated_radar_receiver_noise_h_cross_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_vx
()
float32
...
standard_name :
calibrated_radar_receiver_noise_v_cross_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_gain_hc
()
float32
...
standard_name :
calibrated_radar_receiver_gain_h_co_polar_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_gain_vc
()
float32
...
standard_name :
calibrated_radar_receiver_gain_v_co_polar_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_gain_hx
()
float32
...
standard_name :
calibrated_radar_receiver_gain_h_cross_polar_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_gain_vx
()
float32
...
standard_name :
calibrated_radar_receiver_gain_v_cross_polar_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
base_1km_hc
()
float32
...
standard_name :
radar_reflectivity_at_1km_at_zero_snr_h_co_polar_channel
units :
dBZ
meta_group :
radar_calibration
[1 values with dtype=float32]
base_1km_vc
()
float32
...
standard_name :
radar_reflectivity_at_1km_at_zero_snr_v_co_polar_channel
units :
dBZ
meta_group :
radar_calibration
[1 values with dtype=float32]
base_1km_hx
()
float32
...
standard_name :
radar_reflectivity_at_1km_at_zero_snr_h_cross_polar_channel
units :
dBZ
meta_group :
radar_calibration
[1 values with dtype=float32]
base_1km_vx
()
float32
...
standard_name :
radar_reflectivity_at_1km_at_zero_snr_v_cross_polar_channel
units :
dBZ
meta_group :
radar_calibration
[1 values with dtype=float32]
sun_power_hc
()
float32
...
standard_name :
calibrated_radar_sun_power_h_co_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
sun_power_vc
()
float32
...
standard_name :
calibrated_radar_sun_power_v_co_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
sun_power_hx
()
float32
...
standard_name :
calibrated_radar_sun_power_h_cross_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
sun_power_vx
()
float32
...
standard_name :
calibrated_radar_sun_power_v_cross_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_source_power_h
()
float32
...
standard_name :
radar_calibration_noise_source_power_h_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_source_power_v
()
float32
...
standard_name :
radar_calibration_noise_source_power_v_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
power_measure_loss_h
()
float32
...
standard_name :
radar_calibration_power_measurement_loss_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
power_measure_loss_v
()
float32
...
standard_name :
radar_calibration_power_measurement_loss_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
coupler_forward_loss_h
()
float32
...
standard_name :
radar_calibration_coupler_forward_loss_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
coupler_forward_loss_v
()
float32
...
standard_name :
radar_calibration_coupler_forward_loss_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
zdr_correction
()
float32
...
standard_name :
calibrated_radar_zdr_correction
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
ldr_correction_h
()
float32
...
standard_name :
calibrated_radar_ldr_correction_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
ldr_correction_v
()
float32
...
standard_name :
calibrated_radar_ldr_correction_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
system_phidp
()
float32
...
standard_name :
calibrated_radar_system_phidp
units :
degrees
meta_group :
radar_calibration
[1 values with dtype=float32]
test_power_h
()
float32
...
standard_name :
radar_calibration_test_power_h_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
test_power_v
()
float32
...
standard_name :
radar_calibration_test_power_v_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_slope_hc
()
float32
...
standard_name :
calibrated_radar_receiver_slope_h_co_polar_channel
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_slope_vc
()
float32
...
standard_name :
calibrated_radar_receiver_slope_v_co_polar_channel
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_slope_hx
()
float32
...
standard_name :
calibrated_radar_receiver_slope_h_cross_polar_channel
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_slope_vx
()
float32
...
standard_name :
calibrated_radar_receiver_slope_v_cross_polar_channel
meta_group :
radar_calibration
[1 values with dtype=float32]
Attributes: (0)
Dimensions:
- sweep: 9
Coordinates: (0)
Inherited coordinates: (0)
Data variables: (12)
- 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]
```
- 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]
```
- 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).

[4]:

vol.root

[4]:

<xarray.DatasetView> Size: 477B
Dimensions:              (sweep: 9)
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 ...
    latitude             float64 8B ...
    longitude            float64 8B ...
    altitude             float64 8B ...
    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

xarray.DataTree

Groups: (12)
<xarray.DatasetView> Size: 4MB Dimensions: (sweep: 9, azimuth: 483, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:15:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 elevation (azimuth) float32 2kB ... latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... 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) timedelta64[ns] 4kB ... ... ... 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 ...
sweep_0
Groups: (0)
Dimensions:
sweep: 9
azimuth: 483
range: 996
Coordinates: (7)
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'], 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. ], dtype=float32)
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], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[483 values with 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
'azimuth_surveillance'
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)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
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]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (sweep: 9, azimuth: 483, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:16:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 elevation (azimuth) float32 2kB ... latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... 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) timedelta64[ns] 4kB ... ... ... 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 ...
sweep_1
Groups: (0)
Dimensions:
sweep: 9
azimuth: 483
range: 996
Coordinates: (7)
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'], 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. ], dtype=float32)
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], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[483 values with 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
'azimuth_surveillance'
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)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
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]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (sweep: 9, azimuth: 482, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:17:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 elevation (azimuth) float32 2kB ... latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... 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) timedelta64[ns] 4kB ... ... ... 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 ...
sweep_2
Groups: (0)
Dimensions:
sweep: 9
azimuth: 482
range: 996
Coordinates: (7)
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'], 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. ], dtype=float32)
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], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[482 values with 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
'azimuth_surveillance'
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)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
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]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (sweep: 9, azimuth: 483, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:17:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 elevation (azimuth) float32 2kB ... latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... 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) timedelta64[ns] 4kB ... ... ... 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 ...
sweep_3
Groups: (0)
Dimensions:
sweep: 9
azimuth: 483
range: 996
Coordinates: (7)
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'], 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. ], dtype=float32)
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], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[483 values with 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
'azimuth_surveillance'
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)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
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]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (sweep: 9, azimuth: 481, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:18:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 elevation (azimuth) float32 2kB ... latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... 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) timedelta64[ns] 4kB ... ... ... 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 ...
sweep_4
Groups: (0)
Dimensions:
sweep: 9
azimuth: 481
range: 996
Coordinates: (7)
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'], 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. ], dtype=float32)
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], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[481 values with 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
'azimuth_surveillance'
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)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[481 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[481 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[481 values with dtype=timedelta64[ns]]
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]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (sweep: 9, azimuth: 482, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:19:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 elevation (azimuth) float32 2kB ... latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... 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) timedelta64[ns] 4kB ... ... ... 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 ...
sweep_5
Groups: (0)
Dimensions:
sweep: 9
azimuth: 482
range: 996
Coordinates: (7)
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'], 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. ], dtype=float32)
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], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[482 values with 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
'azimuth_surveillance'
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)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
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]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (sweep: 9, azimuth: 482, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:20:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 elevation (azimuth) float32 2kB ... latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... 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) timedelta64[ns] 4kB ... ... ... 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 ...
sweep_6
Groups: (0)
Dimensions:
sweep: 9
azimuth: 482
range: 996
Coordinates: (7)
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'], 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. ], dtype=float32)
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], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[482 values with 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
'azimuth_surveillance'
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)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[482 values with dtype=timedelta64[ns]]
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]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (sweep: 9, azimuth: 484, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:21:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 elevation (azimuth) float32 2kB ... latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... 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) timedelta64[ns] 4kB ... ... ... 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 ...
sweep_7
Groups: (0)
Dimensions:
sweep: 9
azimuth: 484
range: 996
Coordinates: (7)
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'], 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. ], dtype=float32)
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], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[484 values with 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
'azimuth_surveillance'
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)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[484 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[484 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[484 values with dtype=timedelta64[ns]]
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]
Attributes: (0)
<xarray.DatasetView> Size: 4MB Dimensions: (sweep: 9, azimuth: 483, range: 996) Coordinates: time (azimuth) datetime64[ns] 4kB 2008-06-04T00:21:... * range (range) float32 4kB 150.0 300.0 ... 1.494e+05 * azimuth (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2 elevation (azimuth) float32 2kB ... latitude float64 8B ... longitude float64 8B ... altitude float64 8B ... 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) timedelta64[ns] 4kB ... ... ... 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 ...
sweep_8
Groups: (0)
Dimensions:
sweep: 9
azimuth: 483
range: 996
Coordinates: (7)
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'], 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. ], dtype=float32)
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], dtype=float32)
elevation
(azimuth)
float32
...
standard_name :
beam_elevation_angle
units :
degrees
positive :
up
[483 values with 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
'azimuth_surveillance'
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)
timedelta64[ns]
...
standard_name :
transmitter_pulse_width
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
prt_ratio
(azimuth)
timedelta64[ns]
...
standard_name :
pulse_repetition_frequency_ratio
meta_group :
instrument_parameters
[483 values with dtype=timedelta64[ns]]
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]
Attributes: (0)
<xarray.DatasetView> Size: 20B Dimensions: (sweep: 9) Dimensions without coordinates: sweep Data variables: radar_beam_width_h float32 4B ... radar_antenna_gain_h float32 4B ... radar_antenna_gain_v float32 4B ... radar_beam_width_v float32 4B ... radar_receiver_bandwidth float32 4B ...
radar_parameters
Groups: (0)
Dimensions:
sweep: 9
Coordinates: (0)
Data variables: (5)
radar_beam_width_h
()
float32
...
standard_name :
half_power_radar_beam_width_h_channel
units :
degrees
meta_group :
radar_parameters
[1 values with dtype=float32]
radar_antenna_gain_h
()
float32
...
standard_name :
nominal_radar_antenna_gain_h_channel
units :
dB
meta_group :
radar_parameters
[1 values with dtype=float32]
radar_antenna_gain_v
()
float32
...
standard_name :
nominal_radar_antenna_gain_v_channel
units :
dB
meta_group :
radar_parameters
[1 values with dtype=float32]
radar_beam_width_v
()
float32
...
standard_name :
half_power_radar_beam_width_v_channel
units :
degrees
meta_group :
radar_parameters
[1 values with dtype=float32]
radar_receiver_bandwidth
()
float32
...
standard_name :
radar_receiver_bandwidth
units :
s-1
meta_group :
radar_parameters
[1 values with dtype=float32]
Attributes: (0)
<xarray.DatasetView> Size: 64B Dimensions: (sweep: 9) Dimensions without coordinates: sweep Data variables: (12/16) drift_correction float32 4B ... range_correction float32 4B ... pressure_altitude_correction float32 4B ... longitude_correction float32 4B ... pitch_correction float32 4B ... tilt_correction float32 4B ... ... ... vertical_velocity_correction float32 4B ... rotation_correction float32 4B ... elevation_correction float32 4B ... roll_correction float32 4B ... heading_correction float32 4B ... radar_altitude_correction float32 4B ...
georeferencing_correction
Groups: (0)
Dimensions:
sweep: 9
Coordinates: (0)
Data variables: (16)
drift_correction
()
float32
...
standard_name :
platform_drift_angle_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
range_correction
()
float32
...
standard_name :
range_to_center_of_measurement_volume_correction
units :
meters
meta_group :
geometry_correction
[1 values with dtype=float32]
pressure_altitude_correction
()
float32
...
standard_name :
pressure_altitude_correction
units :
meters
meta_group :
geometry_correction
[1 values with dtype=float32]
longitude_correction
()
float32
...
standard_name :
longitude_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
pitch_correction
()
float32
...
standard_name :
platform_pitch_angle_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
tilt_correction
()
float32
...
standard_name :
beam_tilt_angle_relative_to_platform_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
northward_ground_speed_correction
()
float32
...
standard_name :
platform_northward_velocity_correction
units :
meters per second
meta_group :
geometry_correction
[1 values with dtype=float32]
eastward_ground_speed_correction
()
float32
...
standard_name :
platform_eastward_velocity_correction
units :
meters per second
meta_group :
geometry_correction
[1 values with dtype=float32]
azimuth_correction
()
float32
...
standard_name :
azimuth_angle_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
latitude_correction
()
float32
...
standard_name :
latitude_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
vertical_velocity_correction
()
float32
...
standard_name :
platform_vertical_velocity_correction
units :
meters per second
meta_group :
geometry_correction
[1 values with dtype=float32]
rotation_correction
()
float32
...
standard_name :
beam_rotation_angle_relative_to_platform_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
elevation_correction
()
float32
...
standard_name :
beam_elevation_angle_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
roll_correction
()
float32
...
standard_name :
platform_roll_angle_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
heading_correction
()
float32
...
standard_name :
platform_heading_angle_correction
units :
degrees
meta_group :
geometry_correction
[1 values with dtype=float32]
radar_altitude_correction
()
float32
...
standard_name :
altitude_correction
units :
meters
meta_group :
geometry_correction
[1 values with dtype=float32]
Attributes: (0)
<xarray.DatasetView> Size: 212B Dimensions: (sweep: 9) Dimensions without coordinates: sweep Data variables: (12/45) time |S32 32B ... pulse_width timedelta64[ns] 8B ... xmit_power_h float32 4B ... xmit_power_v float32 4B ... two_way_waveguide_loss_h float32 4B ... two_way_waveguide_loss_v float32 4B ... ... ... test_power_h float32 4B ... test_power_v float32 4B ... receiver_slope_hc float32 4B ... receiver_slope_vc float32 4B ... receiver_slope_hx float32 4B ... receiver_slope_vx float32 4B ...
radar_calibration
Groups: (0)
Dimensions:
sweep: 9
Coordinates: (0)
Data variables: (45)
time
()
|S32
...
standard_name :
radar_calibration_time_utc
meta_group :
radar_calibration
[1 values with dtype=|S32]
pulse_width
()
timedelta64[ns]
...
standard_name :
radar_calibration_pulse_width
meta_group :
radar_calibration
[1 values with dtype=timedelta64[ns]]
xmit_power_h
()
float32
...
standard_name :
calibrated_radar_xmit_power_h_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
xmit_power_v
()
float32
...
standard_name :
calibrated_radar_xmit_power_v_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
two_way_waveguide_loss_h
()
float32
...
standard_name :
radar_calibration_two_way_waveguide_loss_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
two_way_waveguide_loss_v
()
float32
...
standard_name :
radar_calibration_two_way_waveguide_loss_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
two_way_radome_loss_h
()
float32
...
standard_name :
radar_calibration_two_way_radome_loss_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
two_way_radome_loss_v
()
float32
...
standard_name :
radar_calibration_two_way_radome_loss_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_mismatch_loss
()
float32
...
standard_name :
radar_calibration_receiver_mismatch_loss
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
radar_constant_h
()
float32
...
standard_name :
calibrated_radar_constant_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
radar_constant_v
()
float32
...
standard_name :
calibrated_radar_constant_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
antenna_gain_h
()
float32
...
standard_name :
calibrated_radar_antenna_gain_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
antenna_gain_v
()
float32
...
standard_name :
calibrated_radar_antenna_gain_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_hc
()
float32
...
standard_name :
calibrated_radar_receiver_noise_h_co_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_vc
()
float32
...
standard_name :
calibrated_radar_receiver_noise_v_co_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_hx
()
float32
...
standard_name :
calibrated_radar_receiver_noise_h_cross_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_vx
()
float32
...
standard_name :
calibrated_radar_receiver_noise_v_cross_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_gain_hc
()
float32
...
standard_name :
calibrated_radar_receiver_gain_h_co_polar_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_gain_vc
()
float32
...
standard_name :
calibrated_radar_receiver_gain_v_co_polar_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_gain_hx
()
float32
...
standard_name :
calibrated_radar_receiver_gain_h_cross_polar_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_gain_vx
()
float32
...
standard_name :
calibrated_radar_receiver_gain_v_cross_polar_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
base_1km_hc
()
float32
...
standard_name :
radar_reflectivity_at_1km_at_zero_snr_h_co_polar_channel
units :
dBZ
meta_group :
radar_calibration
[1 values with dtype=float32]
base_1km_vc
()
float32
...
standard_name :
radar_reflectivity_at_1km_at_zero_snr_v_co_polar_channel
units :
dBZ
meta_group :
radar_calibration
[1 values with dtype=float32]
base_1km_hx
()
float32
...
standard_name :
radar_reflectivity_at_1km_at_zero_snr_h_cross_polar_channel
units :
dBZ
meta_group :
radar_calibration
[1 values with dtype=float32]
base_1km_vx
()
float32
...
standard_name :
radar_reflectivity_at_1km_at_zero_snr_v_cross_polar_channel
units :
dBZ
meta_group :
radar_calibration
[1 values with dtype=float32]
sun_power_hc
()
float32
...
standard_name :
calibrated_radar_sun_power_h_co_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
sun_power_vc
()
float32
...
standard_name :
calibrated_radar_sun_power_v_co_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
sun_power_hx
()
float32
...
standard_name :
calibrated_radar_sun_power_h_cross_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
sun_power_vx
()
float32
...
standard_name :
calibrated_radar_sun_power_v_cross_polar_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_source_power_h
()
float32
...
standard_name :
radar_calibration_noise_source_power_h_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
noise_source_power_v
()
float32
...
standard_name :
radar_calibration_noise_source_power_v_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
power_measure_loss_h
()
float32
...
standard_name :
radar_calibration_power_measurement_loss_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
power_measure_loss_v
()
float32
...
standard_name :
radar_calibration_power_measurement_loss_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
coupler_forward_loss_h
()
float32
...
standard_name :
radar_calibration_coupler_forward_loss_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
coupler_forward_loss_v
()
float32
...
standard_name :
radar_calibration_coupler_forward_loss_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
zdr_correction
()
float32
...
standard_name :
calibrated_radar_zdr_correction
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
ldr_correction_h
()
float32
...
standard_name :
calibrated_radar_ldr_correction_h_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
ldr_correction_v
()
float32
...
standard_name :
calibrated_radar_ldr_correction_v_channel
units :
dB
meta_group :
radar_calibration
[1 values with dtype=float32]
system_phidp
()
float32
...
standard_name :
calibrated_radar_system_phidp
units :
degrees
meta_group :
radar_calibration
[1 values with dtype=float32]
test_power_h
()
float32
...
standard_name :
radar_calibration_test_power_h_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
test_power_v
()
float32
...
standard_name :
radar_calibration_test_power_v_channel
units :
dBm
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_slope_hc
()
float32
...
standard_name :
calibrated_radar_receiver_slope_h_co_polar_channel
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_slope_vc
()
float32
...
standard_name :
calibrated_radar_receiver_slope_v_co_polar_channel
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_slope_hx
()
float32
...
standard_name :
calibrated_radar_receiver_slope_h_cross_polar_channel
meta_group :
radar_calibration
[1 values with dtype=float32]
receiver_slope_vx
()
float32
...
standard_name :
calibrated_radar_receiver_slope_v_cross_polar_channel
meta_group :
radar_calibration
[1 values with dtype=float32]
Attributes: (0)
Dimensions:
- sweep: 9
Coordinates: (0)
Inherited coordinates: (0)
Data variables: (12)
- 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]
```
- 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]
```
- 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-dependend metadata (like fixed_angle, sweep_mode etc.).

[5]:

display(vol["sweep_0"])

<xarray.DatasetView> Size: 4MB
Dimensions:                    (sweep: 9, azimuth: 483, range: 996)
Coordinates:
    time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:15:...
  * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
  * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
    elevation                  (azimuth) float32 2kB ...
    latitude                   float64 8B ...
    longitude                  float64 8B ...
    altitude                   float64 8B ...
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) timedelta64[ns] 4kB ...
    ...                         ...
    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

Groups: (0)
Dimensions:
- sweep: 9
- azimuth: 483
- range: 996
Coordinates: (7)
- 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'],
      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.     ], dtype=float32)
```
- 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], dtype=float32)
```
- elevation
  (azimuth)
  float32
  ...
  standard_name :
  beam_elevation_angle
  units :
  degrees
  positive :
  up
```
[483 values with 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]
```
Inherited coordinates: (0)
Data variables: (18)
- sweep_number
  ()
  int32
  ...
  standard_name :
  sweep_index_number_0_based
```
[1 values with dtype=int32]
```
- sweep_mode
  ()
  <U20
  'azimuth_surveillance'
```
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)
  timedelta64[ns]
  ...
  standard_name :
  transmitter_pulse_width
  meta_group :
  instrument_parameters
```
[483 values with dtype=timedelta64[ns]]
```
- prt
  (azimuth)
  timedelta64[ns]
  ...
  standard_name :
  pulse_repetition_frequency
  meta_group :
  instrument_parameters
```
[483 values with dtype=timedelta64[ns]]
```
- prt_ratio
  (azimuth)
  timedelta64[ns]
  ...
  standard_name :
  pulse_repetition_frequency_ratio
  meta_group :
  instrument_parameters
```
[483 values with dtype=timedelta64[ns]]
```
- 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]
```
Attributes: (0)

Georeferencing#

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

[6]:

swp = vol["sweep_0"].ds
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)
    sweep_mode                 <U20 80B 'azimuth_surveillance'
    time                       (azimuth) datetime64[ns] 4kB 2008-06-04T00:15:...
  * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
  * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
    elevation                  (azimuth) float32 2kB 0.5164 0.5219 ... 0.5219
    latitude                   float64 8B 22.53
    ...                         ...
    y                          (azimuth, range) float64 4MB 150.0 ... 1.493e+05
    z                          (azimuth, range) float64 4MB 46.35 ... 2.718e+03
    gr                         (azimuth, range) float64 4MB 150.5 ... 1.494e+05
    rays                       (azimuth, range) float32 2MB 0.0 0.0 ... 359.2
    bins                       (azimuth, range) float32 2MB 150.0 ... 1.494e+05
    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) timedelta64[ns] 4kB ...
    prt                        (azimuth) timedelta64[ns] 4kB ...
    ...                         ...
    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)

sweep_mode

()

<U20

'azimuth_surveillance'

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

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'],
      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.     ], dtype=float32)
```
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], 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], dtype=float32)
```
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)
```

(azimuth, range)

float64

-6.556e-06 ... -1.955e+03

standard_name :: east_west_distance_from_radar
units :: meters

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]])

(azimuth, range)

float64

150.0 300.0 ... 1.492e+05 1.493e+05

standard_name :: north_south_distance_from_radar
units :: meters

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]])

(azimuth, range)

float64

46.35 47.71 ... 2.714e+03 2.718e+03

standard_name :: height_above_ground
units :: meters

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]])

(azimuth, range)

float64

150.5 300.5 ... 1.492e+05 1.494e+05

standard_name :: distance_from_radar
units :: meters

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]])

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]],
      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.     ]], dtype=float32)

crs_wkt
()
int64
0
crs_wkt :
PROJCRS["unknown",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 :
unknown
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)
  timedelta64[ns]
  ...
  standard_name :
  transmitter_pulse_width
  meta_group :
  instrument_parameters
```
[483 values with dtype=timedelta64[ns]]
```
- prt
  (azimuth)
  timedelta64[ns]
  ...
  standard_name :
  pulse_repetition_frequency
  meta_group :
  instrument_parameters
```
[483 values with dtype=timedelta64[ns]]
```
- prt_ratio
  (azimuth)
  timedelta64[ns]
  ...
  standard_name :
  pulse_repetition_frequency_ratio
  meta_group :
  instrument_parameters
```
[483 values with dtype=timedelta64[ns]]
```
- 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]
```

Indexes: (2)

range

PandasIndex

PandasIndex(Index([            150.0,             300.0, 450.0000305175781,
                   600.0,             750.0, 900.0000610351562,
                  1050.0,            1200.0,            1350.0,
                  1500.0,
       ...
                148050.0,          148200.0,          148350.0,
                148500.0,          148650.0,          148800.0,
                148950.0,          149100.0,          149250.0,
                149400.0],
      dtype='float32', name='range', length=996))

azimuth

PandasIndex

PandasIndex(Index([   0.0,   0.75,    1.5,   2.25,    3.0,   3.75,    4.5,   5.25,    6.0,
         6.75,
       ...
        352.5, 353.25,  354.0, 354.75,  355.5, 356.25,  357.0, 357.75,  358.5,
       359.25],
      dtype='float32', name='azimuth', length=483))

Attributes: (0)

Inspect radar moments#

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

[7]:

display(swp.DBZ)

<xarray.DataArray 'DBZ' (azimuth: 483, range: 996)> Size: 2MB
[481068 values with dtype=float32]
Coordinates: (12/15)
    sweep_mode  <U20 80B 'azimuth_surveillance'
    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
  * 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
    latitude    float64 8B 22.53
    ...          ...
    y           (azimuth, range) float64 4MB 150.0 300.0 ... 1.492e+05 1.493e+05
    z           (azimuth, range) float64 4MB 46.35 47.71 ... 2.714e+03 2.718e+03
    gr          (azimuth, range) float64 4MB 150.5 300.5 ... 1.492e+05 1.494e+05
    rays        (azimuth, range) float32 2MB 0.0 0.0 0.0 ... 359.2 359.2 359.2
    bins        (azimuth, range) float32 2MB 150.0 300.0 ... 1.492e+05 1.494e+05
    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)

sweep_mode

()

<U20

'azimuth_surveillance'

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

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'],
      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.     ], dtype=float32)
```
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], 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], dtype=float32)
```
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)
```

(azimuth, range)

float64

-6.556e-06 ... -1.955e+03

standard_name :: east_west_distance_from_radar
units :: meters

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]])

(azimuth, range)

float64

150.0 300.0 ... 1.492e+05 1.493e+05

standard_name :: north_south_distance_from_radar
units :: meters

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]])

(azimuth, range)

float64

46.35 47.71 ... 2.714e+03 2.718e+03

standard_name :: height_above_ground
units :: meters

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]])

(azimuth, range)

float64

150.5 300.5 ... 1.492e+05 1.494e+05

standard_name :: distance_from_radar
units :: meters

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]])

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]],
      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.     ]], dtype=float32)

crs_wkt
()
int64
0
crs_wkt :
PROJCRS["unknown",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 :
unknown
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)
```

Indexes: (2)

range

PandasIndex

PandasIndex(Index([            150.0,             300.0, 450.0000305175781,
                   600.0,             750.0, 900.0000610351562,
                  1050.0,            1200.0,            1350.0,
                  1500.0,
       ...
                148050.0,          148200.0,          148350.0,
                148500.0,          148650.0,          148800.0,
                148950.0,          149100.0,          149250.0,
                149400.0],
      dtype='float32', name='range', length=996))

azimuth

PandasIndex

PandasIndex(Index([   0.0,   0.75,    1.5,   2.25,    3.0,   3.75,    4.5,   5.25,    6.0,
         6.75,
       ...
        352.5, 353.25,  354.0, 354.75,  355.5, 356.25,  357.0, 357.75,  358.5,
       359.25],
      dtype='float32', name='azimuth', length=483))

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.

[8]:

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

[8]:

<matplotlib.collections.QuadMesh at 0x7f3c2d38dd00>

../../../_images/notebooks_fileio_backends_cfradial1_backend_16_1.png

[9]:

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

../../../_images/notebooks_fileio_backends_cfradial1_backend_17_0.png

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.

[10]:

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:
    time                       (azimuth) datetime64[ns] 4kB ...
  * range                      (range) float32 4kB 150.0 300.0 ... 1.494e+05
  * azimuth                    (azimuth) float32 2kB 0.0 0.75 ... 358.5 359.2
    elevation                  (azimuth) float32 2kB ...
    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) timedelta64[ns] 4kB ...
    ...                         ...
    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)
- 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.     ], dtype=float32)
```
- 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], dtype=float32)
```
- elevation
  (azimuth)
  float32
  ...
  standard_name :
  beam_elevation_angle
  units :
  degrees
  positive :
  up
```
[483 values with 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
  ...
```
[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)
  timedelta64[ns]
  ...
  standard_name :
  transmitter_pulse_width
  meta_group :
  instrument_parameters
```
[483 values with dtype=timedelta64[ns]]
```
- prt
  (azimuth)
  timedelta64[ns]
  ...
  standard_name :
  pulse_repetition_frequency
  meta_group :
  instrument_parameters
```
[483 values with dtype=timedelta64[ns]]
```
- prt_ratio
  (azimuth)
  timedelta64[ns]
  ...
  standard_name :
  pulse_repetition_frequency_ratio
  meta_group :
  instrument_parameters
```
[483 values with dtype=timedelta64[ns]]
```
- 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]
```

Indexes: (2)

range

PandasIndex

PandasIndex(Index([            150.0,             300.0, 450.0000305175781,
                   600.0,             750.0, 900.0000610351562,
                  1050.0,            1200.0,            1350.0,
                  1500.0,
       ...
                148050.0,          148200.0,          148350.0,
                148500.0,          148650.0,          148800.0,
                148950.0,          149100.0,          149250.0,
                149400.0],
      dtype='float32', name='range', length=996))

azimuth

PandasIndex

PandasIndex(Index([   0.0,   0.75,    1.5,   2.25,    3.0,   3.75,    4.5,   5.25,    6.0,
         6.75,
       ...
        352.5, 353.25,  354.0, 354.75,  355.5, 356.25,  357.0, 357.75,  358.5,
       359.25],
      dtype='float32', name='azimuth', length=483))

Attributes: (0)

xarray CfRadial1 backend

Contents

xarray CfRadial1 backend#

Load CfRadial1 Volume Data#

Inspect RadarVolume#

Inspect root group#

Inspect sweep group(s)#

Georeferencing#

Inspect radar moments#

Create simple plot#

Use xr.open_dataset to retrieve explicit group#

Use `xr.open_dataset` to retrieve explicit group#