xradar furuno backend#

In this example, we read scn/scnx (furuno) data files using the xradar furuno xarray backend.

import glob
import gzip
import io
import wradlib as wrl
import wradlib_data
import warnings
from IPython.display import display

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

warnings.filterwarnings("ignore")

Load furuno scn Data#

Data provided by University of Graz, Austria.

fpath = "furuno/0080_20210730_160000_01_02.scn.gz"
f = wradlib_data.DATASETS.fetch(fpath)
vol = xd.io.open_furuno_datatree(f, reindex_angle=False)

Downloading file 'furuno/0080_20210730_160000_01_02.scn.gz' from 'https://github.com/wradlib/wradlib-data/raw/main/data/furuno/0080_20210730_160000_01_02.scn.gz' to '/home/docs/.cache/wradlib-data'.

Inspect scn RadarVolume#

display(vol)

<xarray.DataTree>
Group: /
│   Dimensions:              (sweep: 1)
│   Coordinates:
│       longitude            float64 8B 15.45
│       altitude             float64 8B 407.9
│       latitude             float64 8B 47.08
│   Dimensions without coordinates: sweep
│   Data variables:
│       volume_number        int64 8B 0
│       platform_type        <U5 20B 'fixed'
│       instrument_type      <U5 20B 'radar'
│       time_coverage_start  <U20 80B '2021-07-30T16:00:00Z'
│       time_coverage_end    <U20 80B '2021-07-30T16:00:14Z'
│       sweep_group_name     (sweep) int64 8B 0
│       sweep_fixed_angle    (sweep) float64 8B 7.8
│   Attributes:
│       Conventions:      None
│       instrument_name:  None
│       version:          3
│       title:            None
│       institution:      None
│       references:       None
│       source:           Furuno
│       history:          None
│       comment:          im/exported using xradar
└── Group: /sweep_0
        Dimensions:            (azimuth: 1376, range: 602)
        Coordinates:
          * azimuth            (azimuth) float64 11kB 0.21 0.47 0.74 ... 359.7 359.9
            elevation          (azimuth) float64 11kB ...
            time               (azimuth) datetime64[ns] 11kB 2021-07-30T16:00:06.2777...
          * range              (range) float32 2kB 25.0 75.0 ... 3.002e+04 3.008e+04
        Data variables: (12/14)
            RATE               (azimuth, range) float64 7MB ...
            DBZH               (azimuth, range) float64 7MB ...
            VRADH              (azimuth, range) float64 7MB ...
            ZDR                (azimuth, range) float64 7MB ...
            KDP                (azimuth, range) float64 7MB ...
            PHIDP              (azimuth, range) float64 7MB ...
            ...                 ...
            QUAL               (azimuth, range) uint16 2MB ...
            sweep_mode         <U20 80B ...
            sweep_number       int64 8B ...
            prt_mode           <U7 28B ...
            follow_mode        <U7 28B ...
            sweep_fixed_angle  float64 8B ...

xarray.DataTree

/sweep_0(18)
- Dimensions:
  sweep: 1
  azimuth: 1376
  range: 602
- Coordinates: (4)
  azimuth
  (azimuth)
  float64
  0.21 0.47 0.74 ... 359.7 359.9
  standard_name :
  ray_azimuth_angle
  long_name :
  azimuth_angle_from_true_north
  units :
  degrees
  axis :
  radial_azimuth_coordinate
  array([2.1000e-01, 4.7000e-01, 7.4000e-01, ..., 3.5942e+02, 3.5968e+02,3.5994e+02], shape=(1376,))
  elevation
  (azimuth)
  float64
  ...
  standard_name :
  ray_elevation_angle
  long_name :
  elevation_angle_from_horizontal_plane
  units :
  degrees
  axis :
  radial_elevation_coordinate
  [1376 values with dtype=float64]
  time
  (azimuth)
  datetime64[ns]
  2021-07-30T16:00:06.277723500 .....
  standard_name :
  time
  array(['2021-07-30T16:00:06.277723500', '2021-07-30T16:00:06.288556500','2021-07-30T16:00:06.299389500', ..., '2021-07-30T16:00:06.245224500','2021-07-30T16:00:06.256057500', '2021-07-30T16:00:06.266890500'],shape=(1376,), dtype='datetime64[ns]')
  range
  (range)
  float32
  25.0 75.0 ... 3.002e+04 3.008e+04
  units :
  meters
  standard_name :
  projection_range_coordinate
  long_name :
  range_to_measurement_volume
  axis :
  radial_range_coordinate
  meters_between_gates :
  50.0
  spacing_is_constant :
  true
  meters_to_center_of_first_gate :
  25.0
  array([2.5000e+01, 7.5000e+01, 1.2500e+02, ..., 2.9975e+04, 3.0025e+04,3.0075e+04], shape=(602,), dtype=float32)
- Data variables: (14)
  RATE
  (azimuth, range)
  float64
  ...
  long_name :
  rainfall_rate
  units :
  mm h-1
  standard_name :
  rainfall_rate
  [828352 values with dtype=float64]
  DBZH
  (azimuth, range)
  float64
  ...
  long_name :
  Equivalent reflectivity factor H
  units :
  dBZ
  standard_name :
  radar_equivalent_reflectivity_factor_h
  [828352 values with dtype=float64]
  VRADH
  (azimuth, range)
  float64
  ...
  long_name :
  Radial velocity of scatterers away from instrument H
  units :
  meters per seconds
  standard_name :
  radial_velocity_of_scatterers_away_from_instrument_h
  [828352 values with dtype=float64]
  ZDR
  (azimuth, range)
  float64
  ...
  long_name :
  Log differential reflectivity H/V
  units :
  dB
  standard_name :
  radar_differential_reflectivity_hv
  [828352 values with dtype=float64]
  KDP
  (azimuth, range)
  float64
  ...
  long_name :
  Specific differential phase HV
  units :
  degrees per kilometer
  standard_name :
  radar_specific_differential_phase_hv
  [828352 values with dtype=float64]
  PHIDP
  (azimuth, range)
  float64
  ...
  long_name :
  Differential phase HV
  units :
  degrees
  standard_name :
  radar_differential_phase_hv
  [828352 values with dtype=float64]
  RHOHV
  (azimuth, range)
  float64
  ...
  long_name :
  Correlation coefficient HV
  units :
  unitless
  standard_name :
  radar_correlation_coefficient_hv
  [828352 values with dtype=float64]
  WRADH
  (azimuth, range)
  float64
  ...
  long_name :
  Doppler spectrum width H
  units :
  meters per seconds
  standard_name :
  radar_doppler_spectrum_width_h
  [828352 values with dtype=float64]
  QUAL
  (azimuth, range)
  uint16
  ...
  [828352 values with dtype=uint16]
  sweep_mode
  ()
  <U20
  ...
  [1 values with dtype=<U20]
  sweep_number
  ()
  int64
  ...
  [1 values with dtype=int64]
  prt_mode
  ()
  <U7
  ...
  [1 values with dtype=<U7]
  follow_mode
  ()
  <U7
  ...
  [1 values with dtype=<U7]
  sweep_fixed_angle
  ()
  float64
  ...
  [1 values with dtype=float64]
Dimensions:
- sweep: 1
Coordinates: (3)
- longitude
  ()
  float64
  15.45
  long_name :
  longitude
  units :
  degrees_east
  standard_name :
  longitude
```
array(15.44729)
```
- altitude
  ()
  float64
  407.9
  long_name :
  altitude
  units :
  meters
  standard_name :
  altitude
```
array(407.9)
```
- latitude
  ()
  float64
  47.08
  long_name :
  latitude
  units :
  degrees_north
  positive :
  up
  standard_name :
  latitude
```
array(47.07734)
```
Data variables: (7)
- volume_number
  ()
  int64
  0
```
array(0)
```
- platform_type
  ()
  <U5
  'fixed'
```
array('fixed', dtype='<U5')
```
- instrument_type
  ()
  <U5
  'radar'
```
array('radar', dtype='<U5')
```
- time_coverage_start
  ()
  <U20
  '2021-07-30T16:00:00Z'
```
array('2021-07-30T16:00:00Z', dtype='<U20')
```
- time_coverage_end
  ()
  <U20
  '2021-07-30T16:00:14Z'
```
array('2021-07-30T16:00:14Z', dtype='<U20')
```
- sweep_group_name
  (sweep)
  int64
  0
```
array([0])
```
- sweep_fixed_angle
  (sweep)
  float64
  7.8
```
array([7.8])
```
Attributes: (9)
Conventions :
None
instrument_name :
None
version :
3
title :
None
institution :
None
references :
None
source :
Furuno
history :
None
comment :
im/exported using xradar

Inspect scn root group#

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

vol.root

<xarray.DataTree>
Group: /
│   Dimensions:              (sweep: 1)
│   Coordinates:
│       longitude            float64 8B 15.45
│       altitude             float64 8B 407.9
│       latitude             float64 8B 47.08
│   Dimensions without coordinates: sweep
│   Data variables:
│       volume_number        int64 8B 0
│       platform_type        <U5 20B 'fixed'
│       instrument_type      <U5 20B 'radar'
│       time_coverage_start  <U20 80B '2021-07-30T16:00:00Z'
│       time_coverage_end    <U20 80B '2021-07-30T16:00:14Z'
│       sweep_group_name     (sweep) int64 8B 0
│       sweep_fixed_angle    (sweep) float64 8B 7.8
│   Attributes:
│       Conventions:      None
│       instrument_name:  None
│       version:          3
│       title:            None
│       institution:      None
│       references:       None
│       source:           Furuno
│       history:          None
│       comment:          im/exported using xradar
└── Group: /sweep_0
        Dimensions:            (azimuth: 1376, range: 602)
        Coordinates:
          * azimuth            (azimuth) float64 11kB 0.21 0.47 0.74 ... 359.7 359.9
            elevation          (azimuth) float64 11kB ...
            time               (azimuth) datetime64[ns] 11kB 2021-07-30T16:00:06.2777...
          * range              (range) float32 2kB 25.0 75.0 ... 3.002e+04 3.008e+04
        Data variables: (12/14)
            RATE               (azimuth, range) float64 7MB ...
            DBZH               (azimuth, range) float64 7MB ...
            VRADH              (azimuth, range) float64 7MB ...
            ZDR                (azimuth, range) float64 7MB ...
            KDP                (azimuth, range) float64 7MB ...
            PHIDP              (azimuth, range) float64 7MB ...
            ...                 ...
            QUAL               (azimuth, range) uint16 2MB ...
            sweep_mode         <U20 80B ...
            sweep_number       int64 8B ...
            prt_mode           <U7 28B ...
            follow_mode        <U7 28B ...
            sweep_fixed_angle  float64 8B ...

xarray.DataTree

/sweep_0(18)
- Dimensions:
  sweep: 1
  azimuth: 1376
  range: 602
- Coordinates: (4)
  azimuth
  (azimuth)
  float64
  0.21 0.47 0.74 ... 359.7 359.9
  standard_name :
  ray_azimuth_angle
  long_name :
  azimuth_angle_from_true_north
  units :
  degrees
  axis :
  radial_azimuth_coordinate
  array([2.1000e-01, 4.7000e-01, 7.4000e-01, ..., 3.5942e+02, 3.5968e+02,3.5994e+02], shape=(1376,))
  elevation
  (azimuth)
  float64
  ...
  standard_name :
  ray_elevation_angle
  long_name :
  elevation_angle_from_horizontal_plane
  units :
  degrees
  axis :
  radial_elevation_coordinate
  [1376 values with dtype=float64]
  time
  (azimuth)
  datetime64[ns]
  2021-07-30T16:00:06.277723500 .....
  standard_name :
  time
  array(['2021-07-30T16:00:06.277723500', '2021-07-30T16:00:06.288556500','2021-07-30T16:00:06.299389500', ..., '2021-07-30T16:00:06.245224500','2021-07-30T16:00:06.256057500', '2021-07-30T16:00:06.266890500'],shape=(1376,), dtype='datetime64[ns]')
  range
  (range)
  float32
  25.0 75.0 ... 3.002e+04 3.008e+04
  units :
  meters
  standard_name :
  projection_range_coordinate
  long_name :
  range_to_measurement_volume
  axis :
  radial_range_coordinate
  meters_between_gates :
  50.0
  spacing_is_constant :
  true
  meters_to_center_of_first_gate :
  25.0
  array([2.5000e+01, 7.5000e+01, 1.2500e+02, ..., 2.9975e+04, 3.0025e+04,3.0075e+04], shape=(602,), dtype=float32)
- Data variables: (14)
  RATE
  (azimuth, range)
  float64
  ...
  long_name :
  rainfall_rate
  units :
  mm h-1
  standard_name :
  rainfall_rate
  [828352 values with dtype=float64]
  DBZH
  (azimuth, range)
  float64
  ...
  long_name :
  Equivalent reflectivity factor H
  units :
  dBZ
  standard_name :
  radar_equivalent_reflectivity_factor_h
  [828352 values with dtype=float64]
  VRADH
  (azimuth, range)
  float64
  ...
  long_name :
  Radial velocity of scatterers away from instrument H
  units :
  meters per seconds
  standard_name :
  radial_velocity_of_scatterers_away_from_instrument_h
  [828352 values with dtype=float64]
  ZDR
  (azimuth, range)
  float64
  ...
  long_name :
  Log differential reflectivity H/V
  units :
  dB
  standard_name :
  radar_differential_reflectivity_hv
  [828352 values with dtype=float64]
  KDP
  (azimuth, range)
  float64
  ...
  long_name :
  Specific differential phase HV
  units :
  degrees per kilometer
  standard_name :
  radar_specific_differential_phase_hv
  [828352 values with dtype=float64]
  PHIDP
  (azimuth, range)
  float64
  ...
  long_name :
  Differential phase HV
  units :
  degrees
  standard_name :
  radar_differential_phase_hv
  [828352 values with dtype=float64]
  RHOHV
  (azimuth, range)
  float64
  ...
  long_name :
  Correlation coefficient HV
  units :
  unitless
  standard_name :
  radar_correlation_coefficient_hv
  [828352 values with dtype=float64]
  WRADH
  (azimuth, range)
  float64
  ...
  long_name :
  Doppler spectrum width H
  units :
  meters per seconds
  standard_name :
  radar_doppler_spectrum_width_h
  [828352 values with dtype=float64]
  QUAL
  (azimuth, range)
  uint16
  ...
  [828352 values with dtype=uint16]
  sweep_mode
  ()
  <U20
  ...
  [1 values with dtype=<U20]
  sweep_number
  ()
  int64
  ...
  [1 values with dtype=int64]
  prt_mode
  ()
  <U7
  ...
  [1 values with dtype=<U7]
  follow_mode
  ()
  <U7
  ...
  [1 values with dtype=<U7]
  sweep_fixed_angle
  ()
  float64
  ...
  [1 values with dtype=float64]
Dimensions:
- sweep: 1
Coordinates: (3)
- longitude
  ()
  float64
  15.45
  long_name :
  longitude
  units :
  degrees_east
  standard_name :
  longitude
```
array(15.44729)
```
- altitude
  ()
  float64
  407.9
  long_name :
  altitude
  units :
  meters
  standard_name :
  altitude
```
array(407.9)
```
- latitude
  ()
  float64
  47.08
  long_name :
  latitude
  units :
  degrees_north
  positive :
  up
  standard_name :
  latitude
```
array(47.07734)
```
Data variables: (7)
- volume_number
  ()
  int64
  0
```
array(0)
```
- platform_type
  ()
  <U5
  'fixed'
```
array('fixed', dtype='<U5')
```
- instrument_type
  ()
  <U5
  'radar'
```
array('radar', dtype='<U5')
```
- time_coverage_start
  ()
  <U20
  '2021-07-30T16:00:00Z'
```
array('2021-07-30T16:00:00Z', dtype='<U20')
```
- time_coverage_end
  ()
  <U20
  '2021-07-30T16:00:14Z'
```
array('2021-07-30T16:00:14Z', dtype='<U20')
```
- sweep_group_name
  (sweep)
  int64
  0
```
array([0])
```
- sweep_fixed_angle
  (sweep)
  float64
  7.8
```
array([7.8])
```
Attributes: (9)
Conventions :
None
instrument_name :
None
version :
3
title :
None
institution :
None
references :
None
source :
Furuno
history :
None
comment :
im/exported using xradar

Inspect scn sweep group(s)#

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

display(vol["sweep_0"])

<xarray.DataTree 'sweep_0'>
Group: /sweep_0
    Dimensions:            (sweep: 1, azimuth: 1376, range: 602)
    Coordinates:
      * azimuth            (azimuth) float64 11kB 0.21 0.47 0.74 ... 359.7 359.9
        elevation          (azimuth) float64 11kB ...
        time               (azimuth) datetime64[ns] 11kB 2021-07-30T16:00:06.2777...
      * range              (range) float32 2kB 25.0 75.0 ... 3.002e+04 3.008e+04
    Dimensions without coordinates: sweep
    Data variables: (12/14)
        RATE               (azimuth, range) float64 7MB ...
        DBZH               (azimuth, range) float64 7MB ...
        VRADH              (azimuth, range) float64 7MB ...
        ZDR                (azimuth, range) float64 7MB ...
        KDP                (azimuth, range) float64 7MB ...
        PHIDP              (azimuth, range) float64 7MB ...
        ...                 ...
        QUAL               (azimuth, range) uint16 2MB ...
        sweep_mode         <U20 80B ...
        sweep_number       int64 8B ...
        prt_mode           <U7 28B ...
        follow_mode        <U7 28B ...
        sweep_fixed_angle  float64 8B ...

xarray.DataTree

'sweep_0'

Dimensions:
- sweep: 1
- azimuth: 1376
- range: 602
Coordinates: (4)
- azimuth
  (azimuth)
  float64
  0.21 0.47 0.74 ... 359.7 359.9
  standard_name :
  ray_azimuth_angle
  long_name :
  azimuth_angle_from_true_north
  units :
  degrees
  axis :
  radial_azimuth_coordinate
```
array([2.1000e-01, 4.7000e-01, 7.4000e-01, ..., 3.5942e+02, 3.5968e+02,
       3.5994e+02], shape=(1376,))
```
- elevation
  (azimuth)
  float64
  ...
  standard_name :
  ray_elevation_angle
  long_name :
  elevation_angle_from_horizontal_plane
  units :
  degrees
  axis :
  radial_elevation_coordinate
```
[1376 values with dtype=float64]
```
- time
  (azimuth)
  datetime64[ns]
  2021-07-30T16:00:06.277723500 .....
  standard_name :
  time
```
array(['2021-07-30T16:00:06.277723500', '2021-07-30T16:00:06.288556500',
       '2021-07-30T16:00:06.299389500', ..., '2021-07-30T16:00:06.245224500',
       '2021-07-30T16:00:06.256057500', '2021-07-30T16:00:06.266890500'],
      shape=(1376,), dtype='datetime64[ns]')
```
- range
  (range)
  float32
  25.0 75.0 ... 3.002e+04 3.008e+04
  units :
  meters
  standard_name :
  projection_range_coordinate
  long_name :
  range_to_measurement_volume
  axis :
  radial_range_coordinate
  meters_between_gates :
  50.0
  spacing_is_constant :
  true
  meters_to_center_of_first_gate :
  25.0
```
array([2.5000e+01, 7.5000e+01, 1.2500e+02, ..., 2.9975e+04, 3.0025e+04,
       3.0075e+04], shape=(602,), dtype=float32)
```
Data variables: (14)
- RATE
  (azimuth, range)
  float64
  ...
  long_name :
  rainfall_rate
  units :
  mm h-1
  standard_name :
  rainfall_rate
```
[828352 values with dtype=float64]
```
- DBZH
  (azimuth, range)
  float64
  ...
  long_name :
  Equivalent reflectivity factor H
  units :
  dBZ
  standard_name :
  radar_equivalent_reflectivity_factor_h
```
[828352 values with dtype=float64]
```
- VRADH
  (azimuth, range)
  float64
  ...
  long_name :
  Radial velocity of scatterers away from instrument H
  units :
  meters per seconds
  standard_name :
  radial_velocity_of_scatterers_away_from_instrument_h
```
[828352 values with dtype=float64]
```
- ZDR
  (azimuth, range)
  float64
  ...
  long_name :
  Log differential reflectivity H/V
  units :
  dB
  standard_name :
  radar_differential_reflectivity_hv
```
[828352 values with dtype=float64]
```
- KDP
  (azimuth, range)
  float64
  ...
  long_name :
  Specific differential phase HV
  units :
  degrees per kilometer
  standard_name :
  radar_specific_differential_phase_hv
```
[828352 values with dtype=float64]
```
- PHIDP
  (azimuth, range)
  float64
  ...
  long_name :
  Differential phase HV
  units :
  degrees
  standard_name :
  radar_differential_phase_hv
```
[828352 values with dtype=float64]
```
- RHOHV
  (azimuth, range)
  float64
  ...
  long_name :
  Correlation coefficient HV
  units :
  unitless
  standard_name :
  radar_correlation_coefficient_hv
```
[828352 values with dtype=float64]
```
- WRADH
  (azimuth, range)
  float64
  ...
  long_name :
  Doppler spectrum width H
  units :
  meters per seconds
  standard_name :
  radar_doppler_spectrum_width_h
```
[828352 values with dtype=float64]
```
- QUAL
  (azimuth, range)
  uint16
  ...
```
[828352 values with dtype=uint16]
```
- sweep_mode
  ()
  <U20
  ...
```
[1 values with dtype=<U20]
```
- sweep_number
  ()
  int64
  ...
```
[1 values with dtype=int64]
```
- prt_mode
  ()
  <U7
  ...
```
[1 values with dtype=<U7]
```
- follow_mode
  ()
  <U7
  ...
```
[1 values with dtype=<U7]
```
- sweep_fixed_angle
  ()
  float64
  ...
```
[1 values with dtype=float64]
```

Georeferencing scn#

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

Inspect scn radar moments#

The DataArrays can be accessed by key or by attribute. Each DataArray has dimensions and coordinates of its parent dataset.

display(swp.DBZH)

<xarray.DataArray 'DBZH' (azimuth: 1376, range: 602)> Size: 7MB
[828352 values with dtype=float64]
Coordinates: (12/15)
  * azimuth     (azimuth) float64 11kB 0.21 0.47 0.74 1.0 ... 359.4 359.7 359.9
    elevation   (azimuth) float64 11kB 7.8 7.8 7.8 7.8 7.8 ... 7.8 7.8 7.8 7.8
    time        (azimuth) datetime64[ns] 11kB 2021-07-30T16:00:06.277723500 ....
  * range       (range) float32 2kB 25.0 75.0 125.0 ... 3.002e+04 3.008e+04
    x           (azimuth, range) float64 7MB 0.09078 0.2723 ... -31.13 -31.19
    y           (azimuth, range) float64 7MB 24.77 74.3 ... 2.973e+04 2.978e+04
    ...          ...
    bins        (azimuth, range) float32 3MB 25.0 75.0 ... 3.002e+04 3.008e+04
    sweep_mode  <U20 80B 'azimuth_surveillance'
    longitude   float64 8B 15.45
    altitude    float64 8B 407.9
    latitude    float64 8B 47.08
    crs_wkt     int64 8B 0
Attributes:
    long_name:      Equivalent reflectivity factor H
    units:          dBZ
    standard_name:  radar_equivalent_reflectivity_factor_h

xarray.DataArray

'DBZH'

azimuth: 1376
range: 602

...
```
[828352 values with dtype=float64]
```

Coordinates: (15)

azimuth
(azimuth)
float64
0.21 0.47 0.74 ... 359.7 359.9
standard_name :
ray_azimuth_angle
long_name :
azimuth_angle_from_true_north
units :
degrees
axis :
radial_azimuth_coordinate
```
array([2.1000e-01, 4.7000e-01, 7.4000e-01, ..., 3.5942e+02, 3.5968e+02,
       3.5994e+02], shape=(1376,))
```
elevation
(azimuth)
float64
7.8 7.8 7.8 7.8 ... 7.8 7.8 7.8 7.8
standard_name :
ray_elevation_angle
long_name :
elevation_angle_from_horizontal_plane
units :
degrees
axis :
radial_elevation_coordinate
```
array([7.8, 7.8, 7.8, ..., 7.8, 7.8, 7.8], shape=(1376,))
```

time

(azimuth)

datetime64[ns]

2021-07-30T16:00:06.277723500 .....

standard_name :: time

array(['2021-07-30T16:00:06.277723500', '2021-07-30T16:00:06.288556500',
       '2021-07-30T16:00:06.299389500', ..., '2021-07-30T16:00:06.245224500',
       '2021-07-30T16:00:06.256057500', '2021-07-30T16:00:06.266890500'],
      shape=(1376,), dtype='datetime64[ns]')

range
(range)
float32
25.0 75.0 ... 3.002e+04 3.008e+04
units :
meters
standard_name :
projection_range_coordinate
long_name :
range_to_measurement_volume
axis :
radial_range_coordinate
meters_between_gates :
50.0
spacing_is_constant :
true
meters_to_center_of_first_gate :
25.0
```
array([2.5000e+01, 7.5000e+01, 1.2500e+02, ..., 2.9975e+04, 3.0025e+04,
       3.0075e+04], shape=(602,), dtype=float32)
```

(azimuth, range)

float64

0.09078 0.2723 ... -31.13 -31.19

axis :: X
long_name :: Easting
standard_name :: projection_x_coordinate
units :: metre

array([[ 9.07774109e-02,  2.72332015e-01,  4.53886329e-01, ...,
         1.08789584e+02,  1.08970963e+02,  1.09152341e+02],
       [ 2.03166667e-01,  6.09499515e-01,  1.01583171e+00, ...,
         2.43479264e+02,  2.43885203e+02,  2.44291142e+02],
       [ 3.19874128e-01,  9.59621617e-01,  1.59936808e+00, ...,
         3.83343973e+02,  3.83983100e+02,  3.84622227e+02],
       ...,
       [-2.50714843e-01, -7.52143927e-01, -1.25357221e+00, ...,
        -3.00462011e+02, -3.00962954e+02, -3.01463897e+02],
       [-1.38327074e-01, -4.14980890e-01, -6.91634263e-01, ...,
        -1.65774113e+02, -1.66050499e+02, -1.66326884e+02],
       [-2.59364564e-02, -7.78093071e-02, -1.29682075e-01, ...,
        -3.10828022e+01, -3.11346248e+01, -3.11864473e+01]],
      shape=(1376, 602))

(azimuth, range)

float64

24.77 74.3 ... 2.973e+04 2.978e+04

axis :: Y
long_name :: Northing
standard_name :: projection_y_coordinate
units :: metre

array([[2.47673297e+01, 7.43019296e+01, 1.23836450e+02, ...,
        2.96816957e+04, 2.97311823e+04, 2.97806688e+04],
       [2.47666627e+01, 7.42999288e+01, 1.23833116e+02, ...,
        2.96808965e+04, 2.97303817e+04, 2.97798669e+04],
       [2.47654303e+01, 7.42962316e+01, 1.23826954e+02, ...,
        2.96794195e+04, 2.97289023e+04, 2.97783851e+04],
       ...,
       [2.47662270e+01, 7.42986217e+01, 1.23830937e+02, ...,
        2.96803743e+04, 2.97298587e+04, 2.97793430e+04],
       [2.47671097e+01, 7.43012698e+01, 1.23835351e+02, ...,
        2.96814322e+04, 2.97309183e+04, 2.97804044e+04],
       [2.47674824e+01, 7.43023879e+01, 1.23837214e+02, ...,
        2.96818788e+04, 2.97313657e+04, 2.97808525e+04]],
      shape=(1376, 602))

(azimuth, range)

float64

411.3 418.1 ... 4.535e+03 4.542e+03

standard_name :: height_above_ground
units :: metre

array([[ 411.29292544,  418.07899313,  424.86534987, ..., 4527.89375569,
        4534.85284587, 4541.81222423],
       [ 411.29292544,  418.07899313,  424.86534987, ..., 4527.89375569,
        4534.85284587, 4541.81222423],
       [ 411.29292544,  418.07899313,  424.86534987, ..., 4527.89375569,
        4534.85284587, 4541.81222423],
       ...,
       [ 411.29292544,  418.07899313,  424.86534987, ..., 4527.89375569,
        4534.85284587, 4541.81222423],
       [ 411.29292544,  418.07899313,  424.86534987, ..., 4527.89375569,
        4534.85284587, 4541.81222423],
       [ 411.29292544,  418.07899313,  424.86534987, ..., 4527.89375569,
        4534.85284587, 4541.81222423]], shape=(1376, 602))

(azimuth, range)

float64

24.77 74.3 ... 2.973e+04 2.978e+04

standard_name :: distance_from_radar
units :: metre

array([[2.47698749e+01, 7.43048075e+01, 1.23839661e+02, ...,
        2.96818975e+04, 2.97313844e+04, 2.97808713e+04],
       [2.47698807e+01, 7.43048133e+01, 1.23839667e+02, ...,
        2.96818975e+04, 2.97313844e+04, 2.97808713e+04],
       [2.47698867e+01, 7.43048193e+01, 1.23839673e+02, ...,
        2.96818975e+04, 2.97313844e+04, 2.97808713e+04],
       ...,
       [2.47698568e+01, 7.43047894e+01, 1.23839643e+02, ...,
        2.96818975e+04, 2.97313844e+04, 2.97808712e+04],
       [2.47698628e+01, 7.43047954e+01, 1.23839649e+02, ...,
        2.96818975e+04, 2.97313844e+04, 2.97808712e+04],
       [2.47698687e+01, 7.43048014e+01, 1.23839655e+02, ...,
        2.96818975e+04, 2.97313844e+04, 2.97808712e+04]],
      shape=(1376, 602))

rays

(azimuth, range)

float64

0.21 0.21 0.21 ... 359.9 359.9

standard_name :: ray_azimuth_angle
long_name :: azimuth_angle_from_true_north
units :: degrees
axis :: radial_azimuth_coordinate

array([[2.1000e-01, 2.1000e-01, 2.1000e-01, ..., 2.1000e-01, 2.1000e-01,
        2.1000e-01],
       [4.7000e-01, 4.7000e-01, 4.7000e-01, ..., 4.7000e-01, 4.7000e-01,
        4.7000e-01],
       [7.4000e-01, 7.4000e-01, 7.4000e-01, ..., 7.4000e-01, 7.4000e-01,
        7.4000e-01],
       ...,
       [3.5942e+02, 3.5942e+02, 3.5942e+02, ..., 3.5942e+02, 3.5942e+02,
        3.5942e+02],
       [3.5968e+02, 3.5968e+02, 3.5968e+02, ..., 3.5968e+02, 3.5968e+02,
        3.5968e+02],
       [3.5994e+02, 3.5994e+02, 3.5994e+02, ..., 3.5994e+02, 3.5994e+02,
        3.5994e+02]], shape=(1376, 602))

bins

(azimuth, range)

float32

25.0 75.0 ... 3.002e+04 3.008e+04

units :: meters
standard_name :: projection_range_coordinate
long_name :: range_to_measurement_volume
axis :: radial_range_coordinate
meters_between_gates :: 50.0
spacing_is_constant :: true
meters_to_center_of_first_gate :: 25.0

array([[2.5000e+01, 7.5000e+01, 1.2500e+02, ..., 2.9975e+04, 3.0025e+04,
        3.0075e+04],
       [2.5000e+01, 7.5000e+01, 1.2500e+02, ..., 2.9975e+04, 3.0025e+04,
        3.0075e+04],
       [2.5000e+01, 7.5000e+01, 1.2500e+02, ..., 2.9975e+04, 3.0025e+04,
        3.0075e+04],
       ...,
       [2.5000e+01, 7.5000e+01, 1.2500e+02, ..., 2.9975e+04, 3.0025e+04,
        3.0075e+04],
       [2.5000e+01, 7.5000e+01, 1.2500e+02, ..., 2.9975e+04, 3.0025e+04,
        3.0075e+04],
       [2.5000e+01, 7.5000e+01, 1.2500e+02, ..., 2.9975e+04, 3.0025e+04,
        3.0075e+04]], shape=(1376, 602), dtype=float32)

sweep_mode

()

<U20

'azimuth_surveillance'

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

longitude
()
float64
15.45
long_name :
longitude
units :
degrees_east
standard_name :
longitude
```
array(15.44729)
```
altitude
()
float64
407.9
long_name :
altitude
units :
meters
standard_name :
altitude
```
array(407.9)
```
latitude
()
float64
47.08
long_name :
latitude
units :
degrees_north
positive :
up
standard_name :
latitude
```
array(47.07734)
```
crs_wkt
()
int64
0
crs_wkt :
PROJCRS["AEQD centered at 47.07734000000001N 15.44729E",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",47.07734,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",15.44729,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]
semi_major_axis :
6378137.0
semi_minor_axis :
6356752.314245179
inverse_flattening :
298.257223563
reference_ellipsoid_name :
WGS 84
longitude_of_prime_meridian :
0.0
prime_meridian_name :
Greenwich
geographic_crs_name :
unknown
horizontal_datum_name :
World Geodetic System 1984
projected_crs_name :
AEQD centered at 47.07734000000001N 15.44729E
grid_mapping_name :
azimuthal_equidistant
latitude_of_projection_origin :
47.07734
longitude_of_projection_origin :
15.44729
false_easting :
0.0
false_northing :
0.0
```
array(0)
```

Attributes: (3)
long_name :
Equivalent reflectivity factor H
units :
dBZ
standard_name :
radar_equivalent_reflectivity_factor_h

Create scn simple plot#

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

For more details on plotting radar data see under Visualization.

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

<matplotlib.collections.QuadMesh at 0x7fb3ff1597f0>

../../../_images/bd4d3323f47cbc6adab779073a40afbd5412062af7bb1bd47f9808c008272b2b.png

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

../../../_images/e3fb89baf5f99af175e4393d70ef68eb96c96287c5305737c36a5f56bb057935.png

Load furuno scnx Data#

Data provided by GFZ German Research Centre for Geosciences.

fpath = "furuno/2006_20220324_000000_000.scnx.gz"
f = wradlib_data.DATASETS.fetch(fpath)
vol = xd.io.open_furuno_datatree(f, reindex_angle=False)

Downloading file 'furuno/2006_20220324_000000_000.scnx.gz' from 'https://github.com/wradlib/wradlib-data/raw/main/data/furuno/2006_20220324_000000_000.scnx.gz' to '/home/docs/.cache/wradlib-data'.

Inspect scnx RadarVolume#

display(vol)

<xarray.DataTree>
Group: /
│   Dimensions:              (sweep: 1)
│   Coordinates:
│       longitude            float64 8B 13.24
│       altitude             float64 8B 38.0
│       latitude             float64 8B 53.55
│   Dimensions without coordinates: sweep
│   Data variables:
│       volume_number        int64 8B 0
│       platform_type        <U5 20B 'fixed'
│       instrument_type      <U5 20B 'radar'
│       time_coverage_start  <U20 80B '2022-03-24T00:00:01Z'
│       time_coverage_end    <U20 80B '2022-03-24T00:00:28Z'
│       sweep_group_name     (sweep) int64 8B 0
│       sweep_fixed_angle    (sweep) float64 8B 0.5
│   Attributes:
│       Conventions:      None
│       instrument_name:  None
│       version:          10
│       title:            None
│       institution:      None
│       references:       None
│       source:           Furuno
│       history:          None
│       comment:          im/exported using xradar
└── Group: /sweep_0
        Dimensions:            (azimuth: 722, range: 936)
        Coordinates:
          * azimuth            (azimuth) float64 6kB 0.19 0.68 1.16 ... 359.2 359.7
            elevation          (azimuth) float64 6kB ...
            time               (azimuth) datetime64[ns] 6kB 2022-03-24T00:00:17.65643...
          * range              (range) float32 4kB 37.5 112.5 ... 7.009e+04 7.016e+04
        Data variables: (12/14)
            RATE               (azimuth, range) float64 5MB ...
            DBZH               (azimuth, range) float64 5MB ...
            VRADH              (azimuth, range) float64 5MB ...
            ZDR                (azimuth, range) float64 5MB ...
            KDP                (azimuth, range) float64 5MB ...
            PHIDP              (azimuth, range) float64 5MB ...
            ...                 ...
            QUAL               (azimuth, range) uint16 1MB ...
            sweep_mode         <U20 80B ...
            sweep_number       int64 8B ...
            prt_mode           <U7 28B ...
            follow_mode        <U7 28B ...
            sweep_fixed_angle  float64 8B ...

xarray.DataTree

/sweep_0(18)
- Dimensions:
  sweep: 1
  azimuth: 722
  range: 936
- Coordinates: (4)
  azimuth
  (azimuth)
  float64
  0.19 0.68 1.16 ... 359.2 359.7
  standard_name :
  ray_azimuth_angle
  long_name :
  azimuth_angle_from_true_north
  units :
  degrees
  axis :
  radial_azimuth_coordinate
  array([1.9000e-01, 6.8000e-01, 1.1600e+00, ..., 3.5866e+02, 3.5918e+02,3.5967e+02], shape=(722,))
  elevation
  (azimuth)
  float64
  ...
  standard_name :
  ray_elevation_angle
  long_name :
  elevation_angle_from_horizontal_plane
  units :
  degrees
  axis :
  radial_elevation_coordinate
  [722 values with dtype=float64]
  time
  (azimuth)
  datetime64[ns]
  2022-03-24T00:00:17.656439500 .....
  standard_name :
  time
  array(['2022-03-24T00:00:17.656439500', '2022-03-24T00:00:17.695220500','2022-03-24T00:00:17.734001500', ..., '2022-03-24T00:00:17.540096500','2022-03-24T00:00:17.578877500', '2022-03-24T00:00:17.617658500'],shape=(722,), dtype='datetime64[ns]')
  range
  (range)
  float32
  37.5 112.5 ... 7.009e+04 7.016e+04
  units :
  meters
  standard_name :
  projection_range_coordinate
  long_name :
  range_to_measurement_volume
  axis :
  radial_range_coordinate
  meters_between_gates :
  75.0
  spacing_is_constant :
  true
  meters_to_center_of_first_gate :
  37.5
  array([3.75000e+01, 1.12500e+02, 1.87500e+02, ..., 7.00125e+04, 7.00875e+04,7.01625e+04], shape=(936,), dtype=float32)
- Data variables: (14)
  RATE
  (azimuth, range)
  float64
  ...
  long_name :
  rainfall_rate
  units :
  mm h-1
  standard_name :
  rainfall_rate
  [675792 values with dtype=float64]
  DBZH
  (azimuth, range)
  float64
  ...
  long_name :
  Equivalent reflectivity factor H
  units :
  dBZ
  standard_name :
  radar_equivalent_reflectivity_factor_h
  [675792 values with dtype=float64]
  VRADH
  (azimuth, range)
  float64
  ...
  long_name :
  Radial velocity of scatterers away from instrument H
  units :
  meters per seconds
  standard_name :
  radial_velocity_of_scatterers_away_from_instrument_h
  [675792 values with dtype=float64]
  ZDR
  (azimuth, range)
  float64
  ...
  long_name :
  Log differential reflectivity H/V
  units :
  dB
  standard_name :
  radar_differential_reflectivity_hv
  [675792 values with dtype=float64]
  KDP
  (azimuth, range)
  float64
  ...
  long_name :
  Specific differential phase HV
  units :
  degrees per kilometer
  standard_name :
  radar_specific_differential_phase_hv
  [675792 values with dtype=float64]
  PHIDP
  (azimuth, range)
  float64
  ...
  long_name :
  Differential phase HV
  units :
  degrees
  standard_name :
  radar_differential_phase_hv
  [675792 values with dtype=float64]
  RHOHV
  (azimuth, range)
  float64
  ...
  long_name :
  Correlation coefficient HV
  units :
  unitless
  standard_name :
  radar_correlation_coefficient_hv
  [675792 values with dtype=float64]
  WRADH
  (azimuth, range)
  float64
  ...
  long_name :
  Doppler spectrum width H
  units :
  meters per seconds
  standard_name :
  radar_doppler_spectrum_width_h
  [675792 values with dtype=float64]
  QUAL
  (azimuth, range)
  uint16
  ...
  [675792 values with dtype=uint16]
  sweep_mode
  ()
  <U20
  ...
  [1 values with dtype=<U20]
  sweep_number
  ()
  int64
  ...
  [1 values with dtype=int64]
  prt_mode
  ()
  <U7
  ...
  [1 values with dtype=<U7]
  follow_mode
  ()
  <U7
  ...
  [1 values with dtype=<U7]
  sweep_fixed_angle
  ()
  float64
  ...
  [1 values with dtype=float64]
Dimensions:
- sweep: 1
Coordinates: (3)
- longitude
  ()
  float64
  13.24
  long_name :
  longitude
  units :
  degrees_east
  standard_name :
  longitude
```
array(13.24397)
```
- altitude
  ()
  float64
  38.0
  long_name :
  altitude
  units :
  meters
  standard_name :
  altitude
```
array(38.)
```
- latitude
  ()
  float64
  53.55
  long_name :
  latitude
  units :
  degrees_north
  positive :
  up
  standard_name :
  latitude
```
array(53.55478)
```
Data variables: (7)
- volume_number
  ()
  int64
  0
```
array(0)
```
- platform_type
  ()
  <U5
  'fixed'
```
array('fixed', dtype='<U5')
```
- instrument_type
  ()
  <U5
  'radar'
```
array('radar', dtype='<U5')
```
- time_coverage_start
  ()
  <U20
  '2022-03-24T00:00:01Z'
```
array('2022-03-24T00:00:01Z', dtype='<U20')
```
- time_coverage_end
  ()
  <U20
  '2022-03-24T00:00:28Z'
```
array('2022-03-24T00:00:28Z', dtype='<U20')
```
- sweep_group_name
  (sweep)
  int64
  0
```
array([0])
```
- sweep_fixed_angle
  (sweep)
  float64
  0.5
```
array([0.5])
```
Attributes: (9)
Conventions :
None
instrument_name :
None
version :
10
title :
None
institution :
None
references :
None
source :
Furuno
history :
None
comment :
im/exported using xradar

Inspect scnx root group#

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

vol.root

<xarray.DataTree>
Group: /
│   Dimensions:              (sweep: 1)
│   Coordinates:
│       longitude            float64 8B 13.24
│       altitude             float64 8B 38.0
│       latitude             float64 8B 53.55
│   Dimensions without coordinates: sweep
│   Data variables:
│       volume_number        int64 8B 0
│       platform_type        <U5 20B 'fixed'
│       instrument_type      <U5 20B 'radar'
│       time_coverage_start  <U20 80B '2022-03-24T00:00:01Z'
│       time_coverage_end    <U20 80B '2022-03-24T00:00:28Z'
│       sweep_group_name     (sweep) int64 8B 0
│       sweep_fixed_angle    (sweep) float64 8B 0.5
│   Attributes:
│       Conventions:      None
│       instrument_name:  None
│       version:          10
│       title:            None
│       institution:      None
│       references:       None
│       source:           Furuno
│       history:          None
│       comment:          im/exported using xradar
└── Group: /sweep_0
        Dimensions:            (azimuth: 722, range: 936)
        Coordinates:
          * azimuth            (azimuth) float64 6kB 0.19 0.68 1.16 ... 359.2 359.7
            elevation          (azimuth) float64 6kB ...
            time               (azimuth) datetime64[ns] 6kB 2022-03-24T00:00:17.65643...
          * range              (range) float32 4kB 37.5 112.5 ... 7.009e+04 7.016e+04
        Data variables: (12/14)
            RATE               (azimuth, range) float64 5MB ...
            DBZH               (azimuth, range) float64 5MB ...
            VRADH              (azimuth, range) float64 5MB ...
            ZDR                (azimuth, range) float64 5MB ...
            KDP                (azimuth, range) float64 5MB ...
            PHIDP              (azimuth, range) float64 5MB ...
            ...                 ...
            QUAL               (azimuth, range) uint16 1MB ...
            sweep_mode         <U20 80B ...
            sweep_number       int64 8B ...
            prt_mode           <U7 28B ...
            follow_mode        <U7 28B ...
            sweep_fixed_angle  float64 8B ...

xarray.DataTree

/sweep_0(18)
- Dimensions:
  sweep: 1
  azimuth: 722
  range: 936
- Coordinates: (4)
  azimuth
  (azimuth)
  float64
  0.19 0.68 1.16 ... 359.2 359.7
  standard_name :
  ray_azimuth_angle
  long_name :
  azimuth_angle_from_true_north
  units :
  degrees
  axis :
  radial_azimuth_coordinate
  array([1.9000e-01, 6.8000e-01, 1.1600e+00, ..., 3.5866e+02, 3.5918e+02,3.5967e+02], shape=(722,))
  elevation
  (azimuth)
  float64
  ...
  standard_name :
  ray_elevation_angle
  long_name :
  elevation_angle_from_horizontal_plane
  units :
  degrees
  axis :
  radial_elevation_coordinate
  [722 values with dtype=float64]
  time
  (azimuth)
  datetime64[ns]
  2022-03-24T00:00:17.656439500 .....
  standard_name :
  time
  array(['2022-03-24T00:00:17.656439500', '2022-03-24T00:00:17.695220500','2022-03-24T00:00:17.734001500', ..., '2022-03-24T00:00:17.540096500','2022-03-24T00:00:17.578877500', '2022-03-24T00:00:17.617658500'],shape=(722,), dtype='datetime64[ns]')
  range
  (range)
  float32
  37.5 112.5 ... 7.009e+04 7.016e+04
  units :
  meters
  standard_name :
  projection_range_coordinate
  long_name :
  range_to_measurement_volume
  axis :
  radial_range_coordinate
  meters_between_gates :
  75.0
  spacing_is_constant :
  true
  meters_to_center_of_first_gate :
  37.5
  array([3.75000e+01, 1.12500e+02, 1.87500e+02, ..., 7.00125e+04, 7.00875e+04,7.01625e+04], shape=(936,), dtype=float32)
- Data variables: (14)
  RATE
  (azimuth, range)
  float64
  ...
  long_name :
  rainfall_rate
  units :
  mm h-1
  standard_name :
  rainfall_rate
  [675792 values with dtype=float64]
  DBZH
  (azimuth, range)
  float64
  ...
  long_name :
  Equivalent reflectivity factor H
  units :
  dBZ
  standard_name :
  radar_equivalent_reflectivity_factor_h
  [675792 values with dtype=float64]
  VRADH
  (azimuth, range)
  float64
  ...
  long_name :
  Radial velocity of scatterers away from instrument H
  units :
  meters per seconds
  standard_name :
  radial_velocity_of_scatterers_away_from_instrument_h
  [675792 values with dtype=float64]
  ZDR
  (azimuth, range)
  float64
  ...
  long_name :
  Log differential reflectivity H/V
  units :
  dB
  standard_name :
  radar_differential_reflectivity_hv
  [675792 values with dtype=float64]
  KDP
  (azimuth, range)
  float64
  ...
  long_name :
  Specific differential phase HV
  units :
  degrees per kilometer
  standard_name :
  radar_specific_differential_phase_hv
  [675792 values with dtype=float64]
  PHIDP
  (azimuth, range)
  float64
  ...
  long_name :
  Differential phase HV
  units :
  degrees
  standard_name :
  radar_differential_phase_hv
  [675792 values with dtype=float64]
  RHOHV
  (azimuth, range)
  float64
  ...
  long_name :
  Correlation coefficient HV
  units :
  unitless
  standard_name :
  radar_correlation_coefficient_hv
  [675792 values with dtype=float64]
  WRADH
  (azimuth, range)
  float64
  ...
  long_name :
  Doppler spectrum width H
  units :
  meters per seconds
  standard_name :
  radar_doppler_spectrum_width_h
  [675792 values with dtype=float64]
  QUAL
  (azimuth, range)
  uint16
  ...
  [675792 values with dtype=uint16]
  sweep_mode
  ()
  <U20
  ...
  [1 values with dtype=<U20]
  sweep_number
  ()
  int64
  ...
  [1 values with dtype=int64]
  prt_mode
  ()
  <U7
  ...
  [1 values with dtype=<U7]
  follow_mode
  ()
  <U7
  ...
  [1 values with dtype=<U7]
  sweep_fixed_angle
  ()
  float64
  ...
  [1 values with dtype=float64]
Dimensions:
- sweep: 1
Coordinates: (3)
- longitude
  ()
  float64
  13.24
  long_name :
  longitude
  units :
  degrees_east
  standard_name :
  longitude
```
array(13.24397)
```
- altitude
  ()
  float64
  38.0
  long_name :
  altitude
  units :
  meters
  standard_name :
  altitude
```
array(38.)
```
- latitude
  ()
  float64
  53.55
  long_name :
  latitude
  units :
  degrees_north
  positive :
  up
  standard_name :
  latitude
```
array(53.55478)
```
Data variables: (7)
- volume_number
  ()
  int64
  0
```
array(0)
```
- platform_type
  ()
  <U5
  'fixed'
```
array('fixed', dtype='<U5')
```
- instrument_type
  ()
  <U5
  'radar'
```
array('radar', dtype='<U5')
```
- time_coverage_start
  ()
  <U20
  '2022-03-24T00:00:01Z'
```
array('2022-03-24T00:00:01Z', dtype='<U20')
```
- time_coverage_end
  ()
  <U20
  '2022-03-24T00:00:28Z'
```
array('2022-03-24T00:00:28Z', dtype='<U20')
```
- sweep_group_name
  (sweep)
  int64
  0
```
array([0])
```
- sweep_fixed_angle
  (sweep)
  float64
  0.5
```
array([0.5])
```
Attributes: (9)
Conventions :
None
instrument_name :
None
version :
10
title :
None
institution :
None
references :
None
source :
Furuno
history :
None
comment :
im/exported using xradar

Inspect scnx sweep group(s)#

display(vol["sweep_0"])

<xarray.DataTree 'sweep_0'>
Group: /sweep_0
    Dimensions:            (sweep: 1, azimuth: 722, range: 936)
    Coordinates:
      * azimuth            (azimuth) float64 6kB 0.19 0.68 1.16 ... 359.2 359.7
        elevation          (azimuth) float64 6kB ...
        time               (azimuth) datetime64[ns] 6kB 2022-03-24T00:00:17.65643...
      * range              (range) float32 4kB 37.5 112.5 ... 7.009e+04 7.016e+04
    Dimensions without coordinates: sweep
    Data variables: (12/14)
        RATE               (azimuth, range) float64 5MB ...
        DBZH               (azimuth, range) float64 5MB ...
        VRADH              (azimuth, range) float64 5MB ...
        ZDR                (azimuth, range) float64 5MB ...
        KDP                (azimuth, range) float64 5MB ...
        PHIDP              (azimuth, range) float64 5MB ...
        ...                 ...
        QUAL               (azimuth, range) uint16 1MB ...
        sweep_mode         <U20 80B ...
        sweep_number       int64 8B ...
        prt_mode           <U7 28B ...
        follow_mode        <U7 28B ...
        sweep_fixed_angle  float64 8B ...

xarray.DataTree

'sweep_0'

Dimensions:
- sweep: 1
- azimuth: 722
- range: 936
Coordinates: (4)
- azimuth
  (azimuth)
  float64
  0.19 0.68 1.16 ... 359.2 359.7
  standard_name :
  ray_azimuth_angle
  long_name :
  azimuth_angle_from_true_north
  units :
  degrees
  axis :
  radial_azimuth_coordinate
```
array([1.9000e-01, 6.8000e-01, 1.1600e+00, ..., 3.5866e+02, 3.5918e+02,
       3.5967e+02], shape=(722,))
```
- elevation
  (azimuth)
  float64
  ...
  standard_name :
  ray_elevation_angle
  long_name :
  elevation_angle_from_horizontal_plane
  units :
  degrees
  axis :
  radial_elevation_coordinate
```
[722 values with dtype=float64]
```
- time
  (azimuth)
  datetime64[ns]
  2022-03-24T00:00:17.656439500 .....
  standard_name :
  time
```
array(['2022-03-24T00:00:17.656439500', '2022-03-24T00:00:17.695220500',
       '2022-03-24T00:00:17.734001500', ..., '2022-03-24T00:00:17.540096500',
       '2022-03-24T00:00:17.578877500', '2022-03-24T00:00:17.617658500'],
      shape=(722,), dtype='datetime64[ns]')
```
- range
  (range)
  float32
  37.5 112.5 ... 7.009e+04 7.016e+04
  units :
  meters
  standard_name :
  projection_range_coordinate
  long_name :
  range_to_measurement_volume
  axis :
  radial_range_coordinate
  meters_between_gates :
  75.0
  spacing_is_constant :
  true
  meters_to_center_of_first_gate :
  37.5
```
array([3.75000e+01, 1.12500e+02, 1.87500e+02, ..., 7.00125e+04, 7.00875e+04,
       7.01625e+04], shape=(936,), dtype=float32)
```
Data variables: (14)
- RATE
  (azimuth, range)
  float64
  ...
  long_name :
  rainfall_rate
  units :
  mm h-1
  standard_name :
  rainfall_rate
```
[675792 values with dtype=float64]
```
- DBZH
  (azimuth, range)
  float64
  ...
  long_name :
  Equivalent reflectivity factor H
  units :
  dBZ
  standard_name :
  radar_equivalent_reflectivity_factor_h
```
[675792 values with dtype=float64]
```
- VRADH
  (azimuth, range)
  float64
  ...
  long_name :
  Radial velocity of scatterers away from instrument H
  units :
  meters per seconds
  standard_name :
  radial_velocity_of_scatterers_away_from_instrument_h
```
[675792 values with dtype=float64]
```
- ZDR
  (azimuth, range)
  float64
  ...
  long_name :
  Log differential reflectivity H/V
  units :
  dB
  standard_name :
  radar_differential_reflectivity_hv
```
[675792 values with dtype=float64]
```
- KDP
  (azimuth, range)
  float64
  ...
  long_name :
  Specific differential phase HV
  units :
  degrees per kilometer
  standard_name :
  radar_specific_differential_phase_hv
```
[675792 values with dtype=float64]
```
- PHIDP
  (azimuth, range)
  float64
  ...
  long_name :
  Differential phase HV
  units :
  degrees
  standard_name :
  radar_differential_phase_hv
```
[675792 values with dtype=float64]
```
- RHOHV
  (azimuth, range)
  float64
  ...
  long_name :
  Correlation coefficient HV
  units :
  unitless
  standard_name :
  radar_correlation_coefficient_hv
```
[675792 values with dtype=float64]
```
- WRADH
  (azimuth, range)
  float64
  ...
  long_name :
  Doppler spectrum width H
  units :
  meters per seconds
  standard_name :
  radar_doppler_spectrum_width_h
```
[675792 values with dtype=float64]
```
- QUAL
  (azimuth, range)
  uint16
  ...
```
[675792 values with dtype=uint16]
```
- sweep_mode
  ()
  <U20
  ...
```
[1 values with dtype=<U20]
```
- sweep_number
  ()
  int64
  ...
```
[1 values with dtype=int64]
```
- prt_mode
  ()
  <U7
  ...
```
[1 values with dtype=<U7]
```
- follow_mode
  ()
  <U7
  ...
```
[1 values with dtype=<U7]
```
- sweep_fixed_angle
  ()
  float64
  ...
```
[1 values with dtype=float64]
```

Georeferencing scnx#

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

Inspect scnx radar moments#

The DataArrays can be accessed by key or by attribute. Each DataArray has dimensions and coordinates of its parent dataset.

display(swp.DBZH)

<xarray.DataArray 'DBZH' (azimuth: 722, range: 936)> Size: 5MB
[675792 values with dtype=float64]
Coordinates: (12/15)
  * azimuth     (azimuth) float64 6kB 0.19 0.68 1.16 1.69 ... 358.7 359.2 359.7
    elevation   (azimuth) float64 6kB 0.5 0.5 0.5 0.5 0.5 ... 0.5 0.5 0.5 0.5
    time        (azimuth) datetime64[ns] 6kB 2022-03-24T00:00:17.656439500 .....
  * range       (range) float32 4kB 37.5 112.5 187.5 ... 7.009e+04 7.016e+04
    x           (azimuth, range) float64 5MB 0.1243 0.373 ... -403.6 -404.0
    y           (azimuth, range) float64 5MB 37.5 112.5 ... 7.008e+04 7.015e+04
    ...          ...
    bins        (azimuth, range) float32 3MB 37.5 112.5 ... 7.009e+04 7.016e+04
    sweep_mode  <U20 80B 'azimuth_surveillance'
    longitude   float64 8B 13.24
    altitude    float64 8B 38.0
    latitude    float64 8B 53.55
    crs_wkt     int64 8B 0
Attributes:
    long_name:      Equivalent reflectivity factor H
    units:          dBZ
    standard_name:  radar_equivalent_reflectivity_factor_h

xarray.DataArray

'DBZH'

azimuth: 722
range: 936

...
```
[675792 values with dtype=float64]
```

Coordinates: (15)

azimuth
(azimuth)
float64
0.19 0.68 1.16 ... 359.2 359.7
standard_name :
ray_azimuth_angle
long_name :
azimuth_angle_from_true_north
units :
degrees
axis :
radial_azimuth_coordinate
```
array([1.9000e-01, 6.8000e-01, 1.1600e+00, ..., 3.5866e+02, 3.5918e+02,
       3.5967e+02], shape=(722,))
```
elevation
(azimuth)
float64
0.5 0.5 0.5 0.5 ... 0.5 0.5 0.5 0.5
standard_name :
ray_elevation_angle
long_name :
elevation_angle_from_horizontal_plane
units :
degrees
axis :
radial_elevation_coordinate
```
array([0.5, 0.5, 0.5, ..., 0.5, 0.5, 0.5], shape=(722,))
```

time

(azimuth)

datetime64[ns]

2022-03-24T00:00:17.656439500 .....

standard_name :: time

array(['2022-03-24T00:00:17.656439500', '2022-03-24T00:00:17.695220500',
       '2022-03-24T00:00:17.734001500', ..., '2022-03-24T00:00:17.540096500',
       '2022-03-24T00:00:17.578877500', '2022-03-24T00:00:17.617658500'],
      shape=(722,), dtype='datetime64[ns]')

range
(range)
float32
37.5 112.5 ... 7.009e+04 7.016e+04
units :
meters
standard_name :
projection_range_coordinate
long_name :
range_to_measurement_volume
axis :
radial_range_coordinate
meters_between_gates :
75.0
spacing_is_constant :
true
meters_to_center_of_first_gate :
37.5
```
array([3.75000e+01, 1.12500e+02, 1.87500e+02, ..., 7.00125e+04, 7.00875e+04,
       7.01625e+04], shape=(936,), dtype=float32)
```

(azimuth, range)

float64

0.1243 0.373 ... -403.6 -404.0

axis :: X
long_name :: Easting
standard_name :: projection_x_coordinate
units :: metre

array([[ 1.24349185e-01,  3.73047525e-01,  6.21745827e-01, ...,
         2.32137957e+02,  2.32386602e+02,  2.32635248e+02],
       [ 4.45029555e-01,  1.33508856e+00,  2.22514743e+00, ...,
         8.30791548e+02,  8.31681418e+02,  8.32571288e+02],
       [ 7.59134024e-01,  2.27740190e+00,  3.79566953e+00, ...,
         1.41716909e+03,  1.41868704e+03,  1.42020498e+03],
       ...,
       [-8.76910648e-01, -2.63073174e+00, -4.38455256e+00, ...,
        -1.63703724e+03, -1.63879069e+03, -1.64054414e+03],
       [-5.36647565e-01, -1.60994257e+00, -2.68323741e+00, ...,
        -1.00182619e+03, -1.00289925e+03, -1.00397232e+03],
       [-2.15974101e-01, -6.47922254e-01, -1.07987034e+00, ...,
        -4.03185487e+02, -4.03617344e+02, -4.04049200e+02]],
      shape=(722, 936))

(azimuth, range)

float64

37.5 112.5 ... 7.008e+04 7.015e+04

axis :: Y
long_name :: Northing
standard_name :: projection_y_coordinate
units :: metre

array([[3.74981966e+01, 1.12494581e+02, 1.87490954e+02, ...,
        7.00025075e+04, 7.00774880e+04, 7.01524684e+04],
       [3.74957619e+01, 1.12487277e+02, 1.87478780e+02, ...,
        6.99979623e+04, 7.00729379e+04, 7.01479135e+04],
       [3.74907178e+01, 1.12472145e+02, 1.87453560e+02, ...,
        6.99885460e+04, 7.00635116e+04, 7.01384771e+04],
       ...,
       [3.74881479e+01, 1.12464435e+02, 1.87440711e+02, ...,
        6.99837485e+04, 7.00587089e+04, 7.01336693e+04],
       [3.74945625e+01, 1.12483679e+02, 1.87472784e+02, ...,
        6.99957234e+04, 7.00706966e+04, 7.01456698e+04],
       [3.74977808e+01, 1.12493334e+02, 1.87488875e+02, ...,
        7.00017313e+04, 7.00767110e+04, 7.01516906e+04]], shape=(722, 936))

(azimuth, range)

float64

38.33 38.98 39.64 ... 939.0 940.3

standard_name :: height_above_ground
units :: metre

array([[ 38.32732793,  38.98248092,  39.63829672, ..., 937.73877873,
        939.0122406 , 940.28639607],
       [ 38.32732793,  38.98248092,  39.63829672, ..., 937.73877873,
        939.0122406 , 940.28639607],
       [ 38.32732793,  38.98248092,  39.63829672, ..., 937.73877873,
        939.0122406 , 940.28639607],
       ...,
       [ 38.32732793,  38.98248092,  39.63829672, ..., 937.73877873,
        939.0122406 , 940.28639607],
       [ 38.32732793,  38.98248092,  39.63829672, ..., 937.73877873,
        939.0122406 , 940.28639607],
       [ 38.32732793,  38.98248092,  39.63829672, ..., 937.73877873,
        939.0122406 , 940.28639607]], shape=(722, 936))

(azimuth, range)

float64

37.53 112.5 ... 7.008e+04 7.015e+04

standard_name :: distance_from_radar
units :: metre

array([[3.75308511e+01, 1.12527644e+02, 1.87524428e+02, ...,
        7.00029248e+04, 7.00779057e+04, 7.01528866e+04],
       [3.75306606e+01, 1.12527453e+02, 1.87524237e+02, ...,
        7.00029247e+04, 7.00779055e+04, 7.01528864e+04],
       [3.75304717e+01, 1.12527264e+02, 1.87524048e+02, ...,
        7.00029245e+04, 7.00779054e+04, 7.01528862e+04],
       ...,
       [3.75314306e+01, 1.12528223e+02, 1.87525008e+02, ...,
        7.00029254e+04, 7.00779063e+04, 7.01528872e+04],
       [3.75312363e+01, 1.12528029e+02, 1.87524813e+02, ...,
        7.00029252e+04, 7.00779061e+04, 7.01528870e+04],
       [3.75310507e+01, 1.12527843e+02, 1.87524628e+02, ...,
        7.00029250e+04, 7.00779059e+04, 7.01528868e+04]], shape=(722, 936))

rays

(azimuth, range)

float64

0.19 0.19 0.19 ... 359.7 359.7

standard_name :: ray_azimuth_angle
long_name :: azimuth_angle_from_true_north
units :: degrees
axis :: radial_azimuth_coordinate

array([[1.9000e-01, 1.9000e-01, 1.9000e-01, ..., 1.9000e-01, 1.9000e-01,
        1.9000e-01],
       [6.8000e-01, 6.8000e-01, 6.8000e-01, ..., 6.8000e-01, 6.8000e-01,
        6.8000e-01],
       [1.1600e+00, 1.1600e+00, 1.1600e+00, ..., 1.1600e+00, 1.1600e+00,
        1.1600e+00],
       ...,
       [3.5866e+02, 3.5866e+02, 3.5866e+02, ..., 3.5866e+02, 3.5866e+02,
        3.5866e+02],
       [3.5918e+02, 3.5918e+02, 3.5918e+02, ..., 3.5918e+02, 3.5918e+02,
        3.5918e+02],
       [3.5967e+02, 3.5967e+02, 3.5967e+02, ..., 3.5967e+02, 3.5967e+02,
        3.5967e+02]], shape=(722, 936))

bins

(azimuth, range)

float32

37.5 112.5 ... 7.009e+04 7.016e+04

units :: meters
standard_name :: projection_range_coordinate
long_name :: range_to_measurement_volume
axis :: radial_range_coordinate
meters_between_gates :: 75.0
spacing_is_constant :: true
meters_to_center_of_first_gate :: 37.5

array([[3.75000e+01, 1.12500e+02, 1.87500e+02, ..., 7.00125e+04,
        7.00875e+04, 7.01625e+04],
       [3.75000e+01, 1.12500e+02, 1.87500e+02, ..., 7.00125e+04,
        7.00875e+04, 7.01625e+04],
       [3.75000e+01, 1.12500e+02, 1.87500e+02, ..., 7.00125e+04,
        7.00875e+04, 7.01625e+04],
       ...,
       [3.75000e+01, 1.12500e+02, 1.87500e+02, ..., 7.00125e+04,
        7.00875e+04, 7.01625e+04],
       [3.75000e+01, 1.12500e+02, 1.87500e+02, ..., 7.00125e+04,
        7.00875e+04, 7.01625e+04],
       [3.75000e+01, 1.12500e+02, 1.87500e+02, ..., 7.00125e+04,
        7.00875e+04, 7.01625e+04]], shape=(722, 936), dtype=float32)

sweep_mode

()

<U20

'azimuth_surveillance'

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

longitude
()
float64
13.24
long_name :
longitude
units :
degrees_east
standard_name :
longitude
```
array(13.24397)
```
altitude
()
float64
38.0
long_name :
altitude
units :
meters
standard_name :
altitude
```
array(38.)
```
latitude
()
float64
53.55
long_name :
latitude
units :
degrees_north
positive :
up
standard_name :
latitude
```
array(53.55478)
```
crs_wkt
()
int64
0
crs_wkt :
PROJCRS["AEQD centered at 53.55478N 13.243970000000001E",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",53.55478,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",13.24397,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1,ID["EPSG",9001]]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1,ID["EPSG",9001]]]]
semi_major_axis :
6378137.0
semi_minor_axis :
6356752.314245179
inverse_flattening :
298.257223563
reference_ellipsoid_name :
WGS 84
longitude_of_prime_meridian :
0.0
prime_meridian_name :
Greenwich
geographic_crs_name :
unknown
horizontal_datum_name :
World Geodetic System 1984
projected_crs_name :
AEQD centered at 53.55478N 13.243970000000001E
grid_mapping_name :
azimuthal_equidistant
latitude_of_projection_origin :
53.55478
longitude_of_projection_origin :
13.24397
false_easting :
0.0
false_northing :
0.0
```
array(0)
```

Attributes: (3)
long_name :
Equivalent reflectivity factor H
units :
dBZ
standard_name :
radar_equivalent_reflectivity_factor_h

Create scnx simple plot#

Currently the data dynamic range is left as read from the file. That way the difference between shortpulse and longpulse can be clearly seen.

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

For more details on plotting radar data see under Visualization.

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

<matplotlib.collections.QuadMesh at 0x7fb3fc39fed0>

../../../_images/543a6712790aba1a3a1583b2f256c6b782a28dd0eec26a741a8bef6ddab2f35d.png

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

../../../_images/8153cbe2a6661a65da9790704307f36cb4ad8d3820e044d7f3bcd08c5e7602d1.png

More Furuno loading mechanisms#

Use `xr.open_dataset` to retrieve explicit group#

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

<xarray.Dataset> Size: 45MB
Dimensions:            (azimuth: 722, range: 936)
Coordinates:
  * azimuth            (azimuth) float64 6kB 0.19 0.68 1.16 ... 359.2 359.7
    elevation          (azimuth) float64 6kB ...
    time               (azimuth) datetime64[ns] 6kB ...
  * range              (range) float32 4kB 37.5 112.5 ... 7.009e+04 7.016e+04
    longitude          float64 8B ...
    latitude           float64 8B ...
    altitude           float64 8B ...
Data variables: (12/14)
    RATE               (azimuth, range) float64 5MB ...
    DBZH               (azimuth, range) float64 5MB ...
    VRADH              (azimuth, range) float64 5MB ...
    ZDR                (azimuth, range) float64 5MB ...
    KDP                (azimuth, range) float64 5MB ...
    PHIDP              (azimuth, range) float64 5MB ...
    ...                 ...
    QUAL               (azimuth, range) uint16 1MB ...
    sweep_mode         <U20 80B ...
    sweep_number       int64 8B ...
    prt_mode           <U7 28B ...
    follow_mode        <U7 28B ...
    sweep_fixed_angle  float64 8B ...
Attributes:
    source:                     Furuno
    version:                    10
    antenna_gain_h:             337
    antenna_gain_v:             338
    tx_power_h:                 724
    tx_power_v:                 708
    radar_constant_h:           -1294
    radar_constant_v:           -1296
    noise_power_short_pulse_h:  -604

xarray.Dataset

Dimensions:
- azimuth: 722
- range: 936
Coordinates: (7)
- azimuth
  (azimuth)
  float64
  0.19 0.68 1.16 ... 359.2 359.7
  standard_name :
  ray_azimuth_angle
  long_name :
  azimuth_angle_from_true_north
  units :
  degrees
  axis :
  radial_azimuth_coordinate
```
array([1.9000e-01, 6.8000e-01, 1.1600e+00, ..., 3.5866e+02, 3.5918e+02,
       3.5967e+02], shape=(722,))
```
- elevation
  (azimuth)
  float64
  ...
  standard_name :
  ray_elevation_angle
  long_name :
  elevation_angle_from_horizontal_plane
  units :
  degrees
  axis :
  radial_elevation_coordinate
```
[722 values with dtype=float64]
```
- time
  (azimuth)
  datetime64[ns]
  ...
  standard_name :
  time
```
[722 values with dtype=datetime64[ns]]
```
- range
  (range)
  float32
  37.5 112.5 ... 7.009e+04 7.016e+04
  units :
  meters
  standard_name :
  projection_range_coordinate
  long_name :
  range_to_measurement_volume
  axis :
  radial_range_coordinate
  meters_between_gates :
  75.0
  spacing_is_constant :
  true
  meters_to_center_of_first_gate :
  37.5
```
array([3.75000e+01, 1.12500e+02, 1.87500e+02, ..., 7.00125e+04, 7.00875e+04,
       7.01625e+04], shape=(936,), dtype=float32)
```
- longitude
  ()
  float64
  ...
  long_name :
  longitude
  units :
  degrees_east
  standard_name :
  longitude
```
[1 values with dtype=float64]
```
- latitude
  ()
  float64
  ...
  long_name :
  latitude
  units :
  degrees_north
  positive :
  up
  standard_name :
  latitude
```
[1 values with dtype=float64]
```
- altitude
  ()
  float64
  ...
  long_name :
  altitude
  units :
  meters
  standard_name :
  altitude
```
[1 values with dtype=float64]
```
Data variables: (14)
- RATE
  (azimuth, range)
  float64
  ...
  long_name :
  rainfall_rate
  units :
  mm h-1
  standard_name :
  rainfall_rate
```
[675792 values with dtype=float64]
```
- DBZH
  (azimuth, range)
  float64
  ...
  long_name :
  Equivalent reflectivity factor H
  units :
  dBZ
  standard_name :
  radar_equivalent_reflectivity_factor_h
```
[675792 values with dtype=float64]
```
- VRADH
  (azimuth, range)
  float64
  ...
  long_name :
  Radial velocity of scatterers away from instrument H
  units :
  meters per seconds
  standard_name :
  radial_velocity_of_scatterers_away_from_instrument_h
```
[675792 values with dtype=float64]
```
- ZDR
  (azimuth, range)
  float64
  ...
  long_name :
  Log differential reflectivity H/V
  units :
  dB
  standard_name :
  radar_differential_reflectivity_hv
```
[675792 values with dtype=float64]
```
- KDP
  (azimuth, range)
  float64
  ...
  long_name :
  Specific differential phase HV
  units :
  degrees per kilometer
  standard_name :
  radar_specific_differential_phase_hv
```
[675792 values with dtype=float64]
```
- PHIDP
  (azimuth, range)
  float64
  ...
  long_name :
  Differential phase HV
  units :
  degrees
  standard_name :
  radar_differential_phase_hv
```
[675792 values with dtype=float64]
```
- RHOHV
  (azimuth, range)
  float64
  ...
  long_name :
  Correlation coefficient HV
  units :
  unitless
  standard_name :
  radar_correlation_coefficient_hv
```
[675792 values with dtype=float64]
```
- WRADH
  (azimuth, range)
  float64
  ...
  long_name :
  Doppler spectrum width H
  units :
  meters per seconds
  standard_name :
  radar_doppler_spectrum_width_h
```
[675792 values with dtype=float64]
```
- QUAL
  (azimuth, range)
  uint16
  ...
```
[675792 values with dtype=uint16]
```
- sweep_mode
  ()
  <U20
  ...
```
[1 values with dtype=<U20]
```
- sweep_number
  ()
  int64
  ...
```
[1 values with dtype=int64]
```
- prt_mode
  ()
  <U7
  ...
```
[1 values with dtype=<U7]
```
- follow_mode
  ()
  <U7
  ...
```
[1 values with dtype=<U7]
```
- sweep_fixed_angle
  ()
  float64
  ...
```
[1 values with dtype=float64]
```
Attributes: (9)
source :
Furuno
version :
10
antenna_gain_h :
337
antenna_gain_v :
338
tx_power_h :
724
tx_power_v :
708
radar_constant_h :
-1294
radar_constant_v :
-1296
noise_power_short_pulse_h :
-604

xradar furuno backend

Contents

xradar furuno backend#

Load furuno scn Data#

Inspect scn RadarVolume#

Inspect scn root group#

Inspect scn sweep group(s)#

Georeferencing scn#

Inspect scn radar moments#

Create scn simple plot#

Load furuno scnx Data#

Inspect scnx RadarVolume#

Inspect scnx root group#

Inspect scnx sweep group(s)#

Georeferencing scnx#

Inspect scnx radar moments#

Create scnx simple plot#

More Furuno loading mechanisms#

Use xr.open_dataset to retrieve explicit group#

Use `xr.open_dataset` to retrieve explicit group#