From 7ffcf152d0b7fb3f00aa053cb581c4db8441e9c6 Mon Sep 17 00:00:00 2001 From: Praveen Singh Date: Fri, 15 Nov 2024 11:17:36 -0600 Subject: [PATCH 1/2] Python converter for LGYCLD BUFR DUMP --- rrfs-test/IODA/python/bufr2ioda_nexrad.json | 12 + rrfs-test/IODA/python/bufr2ioda_nexrad.py | 358 ++++++++++++++++++++ 2 files changed, 370 insertions(+) create mode 100644 rrfs-test/IODA/python/bufr2ioda_nexrad.json create mode 100755 rrfs-test/IODA/python/bufr2ioda_nexrad.py diff --git a/rrfs-test/IODA/python/bufr2ioda_nexrad.json b/rrfs-test/IODA/python/bufr2ioda_nexrad.json new file mode 100644 index 0000000..b6c1bf6 --- /dev/null +++ b/rrfs-test/IODA/python/bufr2ioda_nexrad.json @@ -0,0 +1,12 @@ +{ + "data_format": "bufr_d", + "data_type": "nexrad", + "cycle_type": "rap", + "cycle_datetime": "{{ current_cycle | to_YMDH }}", + "dump_directory": "{{ DMPDIR }}", + "ioda_directory": "{{ COM_OBS }}", + "subsets": [ "NC006010", "NC006011", "NC006012", "NC006013", "NC006014", "NC006015", "NC006016", "NC006017", "NC006018", "NC006019", "NC006020", "NC006021", "NC006022", "NC006023", "NC006024", "NC006025", "NC006026", "NC006027", "NC006028", "NC006029", "NC006030", "NC006031", "NC006032", "NC006033", "NC006040", "NC006041", "NC006042", "NC006043", "NC006044", "NC006045", "NC006046", "NC006047", "NC006048", "NC006049", "NC006050", "NC006051", "NC006052", "NC006053", "NC006054", "NC006055", "NC006056", "NC006057", "NC006058", "NC006059", "NC006060", "NC006061", "NC006062", "NC006063" ], + "source": "NCEP data tank", + "data_provider": "U.S. NOAA", + "data_description": "NEXRAD radial wind superobs", +} diff --git a/rrfs-test/IODA/python/bufr2ioda_nexrad.py b/rrfs-test/IODA/python/bufr2ioda_nexrad.py new file mode 100755 index 0000000..5d74a6f --- /dev/null +++ b/rrfs-test/IODA/python/bufr2ioda_nexrad.py @@ -0,0 +1,358 @@ +#!/usr/bin/env python3 +# (C) Copyright 2024 NOAA/NWS/NCEP/EMC +# +# This software is licensed under the terms of the Apache Licence Version 2.0 +# which can be obtained at http://www.apache.org/licenses/LICENSE-2.0. + +import sys +import argparse +import numpy as np +import numpy.ma as ma +import calendar +import json +import time +import copy +import math +import datetime +import os +from datetime import datetime +from pyioda import ioda_obs_space as ioda_ospace +from wxflow import Logger +from pyiodaconv import bufr +from collections import namedtuple +import warnings +# suppress warnings +warnings.filterwarnings('ignore') + + +def Mask_typ_for_var(typ, var): + + typ_var = copy.deepcopy(typ) + for i in range(len(typ_var)): + if ma.is_masked(var[i]): + typ_var[i] = typ.fill_value + + return typ_var + + +def bufr_to_ioda(config, logger): + + subsets = config["subsets"] + logger.debug(f"Checking subsets = {subsets}") + + # Get parameters from configuration + data_format = config["data_format"] + data_type = config["data_type"] + data_description = config["data_description"] + data_provider = config["data_provider"] + cycle_type = config["cycle_type"] + dump_dir = config["dump_directory"] + ioda_dir = config["ioda_directory"] + cycle = config["cycle_datetime"] + + # Get derived parameters + yyyymmdd = cycle[0:8] + hh = cycle[8:10] + reference_time = datetime.strptime(cycle, "%Y%m%d%H") + reference_time = reference_time.strftime("%Y-%m-%dT%H:%M:%SZ") + + # General informaton + converter = 'BUFR to IODA Converter' + platform_description = 'NEXRAD' + + logger.info(f"reference_time = {reference_time}") + + bufrfile = f"{cycle_type}.t{hh}z.{data_type}.tm00.{data_format}" + DATA_PATH = os.path.join(dump_dir, bufrfile) + if not os.path.isfile(DATA_PATH): + logger.info(f"DATA_PATH {DATA_PATH} does not exist") + return + logger.debug(f"The DATA_PATH is: {DATA_PATH}") + + # ============================================ + # Make the QuerySet for all the data we want + # ============================================ + start_time = time.time() + + logger.info('Making QuerySet') + q = bufr.QuerySet(subsets) + + # ObsType + #q.add('observationType', '*/TYP') + + # MetaData + q.add('year', '*/YEAR') + q.add('month', '*/MNTH') + q.add('day', '*/DAYS') + q.add('hour', '*/HOUR') + q.add('minute', '*/MINU') + q.add('second', '*/SECO') + q.add('latitude', '[*/CLATH, */CLAT]') + q.add('longitude', '[*/CLONH, */CLON]') + q.add('stationIdentification', '*/SSTN') + q.add('height', '*/HSMSL') + q.add('heightOfAntenna', '*/HSALG') + + # ObsValue + q.add('beamAzimuthAngle', '*/ANAZ') + q.add('beamTiltAngle', '*/ANEL') + q.add('gateRange', '*/NL2RW{1}/DIST125M') + q.add('radialVelocity', '*/NL2RW{1}/DMVR') + q.add('spectralWidth', '*/NL2RW{1}/DVSW') + q.add('ppiVolume', '*/VOID') + q.add('ppiIndex', '*/SCID') + q.add('unfoldingVelocity', '*/HNQV') + q.add('volumeCoveragePattern', '*/VOCP') + + # QualityMarker + q.add('windAlongRadialLineQM', '*/QCRW') + + end_time = time.time() + running_time = end_time - start_time + logger.debug(f'Running time for making QuerySet : {running_time} seconds') + + # ============================================================== + # Open the BUFR file and execute the QuerySet to get ResultSet + # Use the ResultSet returned to get numpy arrays of the data + # ============================================================== + start_time = time.time() + + logger.info('Executing QuerySet to get ResultSet') + with bufr.File(DATA_PATH) as f: + try: + r = f.execute(q) + except Exception as err: + logger.info(f'Return with {err}') + return + + # ObsType + logger.debug(" ... Executing QuerySet for NEXRAD: get ObsType ...") + #obstyp = r.get('observationType', type='int32') + logger.info('Executing QuerySet: get metadata') + + # MetaData + dvsw = r.get('spectralWidth', 'spectralWidth') + clath = r.get('latitude', 'spectralWidth') + clonh = r.get('longitude', 'spectralWidth') + sstn = r.get('stationIdentification', 'spectralWidth') + hsmsl = r.get('height', 'spectralWidth') + hsalg = r.get('heightOfAntenna', 'spectralWidth') + + # MetaData/Observation Time + year = r.get('year') + month = r.get('month') + day = r.get('day') + hour = r.get('hour') + minute = r.get('minute') + second = r.get('second') + # DateTime: seconds since Epoch time + # IODA has no support for numpy datetime arrays dtype=datetime64[s] + timestamp = r.get_datetime('year', 'month', 'day', 'hour', 'minute', 'second', 'spectralWidth').astype(np.int64) + int64_fill_value = np.int64(0) + timestamp = ma.array(timestamp) + timestamp = ma.masked_values(timestamp, int64_fill_value) + + # ObsValue + anaz = r.get('beamAzimuthAngle', 'spectralWidth') + anel = r.get('beamTiltAngle', 'spectralWidth') + dist125m = r.get('gateRange', 'spectralWidth') + dist125m *= 125 + dmrv = r.get('radialVelocity', 'spectralWidth') + void = r.get('ppiVolume', 'spectralWidth') + scid = r.get('ppiIndex', 'spectralWidth') + hnqv = r.get('unfoldingVelocity', 'spectralWidth') + vocp = r.get('volumeCoveragePattern', 'spectralWidth') + + # QualityMarker + qcrw = r.get('windAlongRadialLineQM', 'spectralWidth') + + logger.info('Executing QuerySet Done!') + end_time = time.time() + running_time = end_time - start_time + logger.info(f"Running time for executing QuerySet to get ResultSet : {running_time} seconds") + + logger.debug('Executing QuerySet: Check BUFR variable generic dimension and type') + # Check BUFR variable generic dimension and type + logger.debug(f' clath shape = {clath.shape}') + logger.debug(f' clonh shape = {clonh.shape}') + logger.debug(f' sstn shape = {sstn.shape}') + logger.debug(f' hsmsl shape = {hsmsl.shape}') + logger.debug(f' hsalg shape = {hsalg.shape}') + + logger.debug(f' anaz shape = {anaz.shape}') + logger.debug(f' anel shape = {anel.shape}') + logger.debug(f' dist125m shape = {dist125m.shape}') + logger.debug(f' dmrv shape = {dmrv.shape}') + logger.debug(f' dvsw shape = {dvsw.shape}') + logger.debug(f' void shape = {void.shape}') + logger.debug(f' scid shape = {scid.shape}') + logger.debug(f' hnqv shape = {hnqv.shape}') + logger.debug(f' vocp shape = {vocp.shape}') + + + logger.debug(f' qcrw shape = {qcrw.shape}') + + logger.debug(f' clath type = {clath.dtype}') + logger.debug(f' clonh type = {clonh.dtype}') + logger.debug(f' sstn type = {sstn.dtype}') + logger.debug(f' hsmsl type = {hsmsl.dtype}') + logger.debug(f' hsalg type = {hsalg.dtype}') + + logger.debug(f' anaz type = {anaz.dtype}') + logger.debug(f' anel type = {anel.dtype}') + logger.debug(f' dist125m type = {dist125m.dtype}') + logger.debug(f' dmrv type = {dmrv.dtype}') + logger.debug(f' dvsw type = {dvsw.dtype}') + logger.debug(f' void type = {void.dtype}') + logger.debug(f' scid type = {scid.dtype}') + logger.debug(f' hnqv type = {hnqv.dtype}') + logger.debug(f' vocp type = {vocp.dtype}') + + logger.debug(f' qcrw type = {qcrw.dtype}') + + # Mask Certain Variables + logger.debug(f"Mask typ for certain variables where data is available...") + + # ===================================== + # Create IODA ObsSpace + # Write IODA output + # ===================================== + + # Create the dimensions + dims = {'Location': np.arange(0, clath.shape[0])} + + # Create IODA ObsSpace + iodafile = f"{cycle_type}.t{hh}z.{data_type}.tm00.{data_format}.api.nc" + OUTPUT_PATH = os.path.join(ioda_dir, iodafile) + logger.info(f"Create output file: {OUTPUT_PATH}") + obsspace = ioda_ospace.ObsSpace(OUTPUT_PATH, mode='w', dim_dict=dims) + + # Create Global attributes + logger.debug(' ... ... Create global attributes') + obsspace.write_attr('sourceFiles', bufrfile) + obsspace.write_attr('description', data_description) + + # Create IODA variables + logger.debug(' ... ... Create variables: name, type, units, and attributes') + + # MetaData: Datetime + obsspace.create_var('MetaData/dateTime', dtype=timestamp.dtype, fillval=timestamp.fill_value) \ + .write_attr('units', 'seconds since 1970-01-01T00:00:00Z') \ + .write_attr('long_name', 'Datetime') \ + .write_data(timestamp) + + # MetaData: Latitude + obsspace.create_var('MetaData/latitude', dtype=clath.dtype, fillval=clath.fill_value) \ + .write_attr('units', 'degrees_north') \ + .write_attr('valid_range', np.array([-90, 90], dtype=np.float32)) \ + .write_attr('long_name', 'Latitude') \ + .write_data(clath) + + # MetaData: Longitude + obsspace.create_var('MetaData/longitude', dtype=clonh.dtype, fillval=clonh.fill_value) \ + .write_attr('units', 'degrees_east') \ + .write_attr('valid_range', np.array([-180, 180], dtype=np.float32)) \ + .write_attr('long_name', 'Longitude') \ + .write_data(clonh) + + # MetaData: Station Identification + obsspace.create_var('MetaData/stationIdentification', dtype=sstn.dtype, fillval=sstn.fill_value) \ + .write_attr('long_name', 'Station Identification') \ + .write_data(sstn) + + # MetaData: Height Of Station Ground Above MSL + obsspace.create_var('MetaData/height', dtype=hsmsl.dtype, fillval=hsmsl.fill_value) \ + .write_attr('units', 'm') \ + .write_attr('long_name', 'Height Of Station Ground Above MSL') \ + .write_data(hsmsl) + + # MetaData: Height Of Antenna Above Ground + obsspace.create_var('MetaData/heightOfAntenna', dtype=hsalg.dtype, fillval=hsalg.fill_value) \ + .write_attr('units', 'm') \ + .write_attr('long_name', 'Height Of Antenna Above Ground') \ + .write_data(hsalg) + + # ObsValue: Antenna Azimuth Angle + obsspace.create_var('ObsValue/beamAzimuthAngle', dtype=anaz.dtype, fillval=anaz.fill_value) \ + .write_attr('units', 'degree') \ + .write_attr('long_name', 'Antenna Azimuth Angle') \ + .write_data(anaz) + + # ObsValue: Antenna Elevation Angle + obsspace.create_var('ObsValue/beamTiltAngle', dtype=anel.dtype, fillval=anel.fill_value) \ + .write_attr('units', 'degree') \ + .write_attr('long_name', 'Antenna Elevation Angle') \ + .write_data(anel) + + # ObsValue: Distance From Antenna + obsspace.create_var('ObsValue/gateRange', dtype=dist125m.dtype, fillval=dist125m.fill_value) \ + .write_attr('units', 'm') \ + .write_attr('long_name', 'Distance From Antenna') \ + .write_data(dist125m) + + # ObsValue: Doppler Mean Radial Velocity + obsspace.create_var('ObsValue/radialVelocity', dtype=dmrv.dtype, fillval=dmrv.fill_value) \ + .write_attr('units', 'm s-1') \ + .write_attr('long_name', 'Doppler Mean Radial Velocity') \ + .write_data(dmrv) + + # ObsValue: Doppler Velocity Spectral Width + obsspace.create_var('ObsValue/spectralWidth', dtype=dvsw.dtype, fillval=dvsw.fill_value) \ + .write_attr('units', 'm s-1') \ + .write_attr('long_name', 'Doppler Velocity Spectral Width') \ + .write_data(dvsw) + + # ObsValue: Radar Volume Id + obsspace.create_var('ObsValue/ppiVolume', dtype=void.dtype, fillval=void.fill_value) \ + .write_attr('long_name', 'Radar Volume Id') \ + .write_data(void) + + # ObsValue: Radar Scan Id + obsspace.create_var('ObsValue/ppiIndex', dtype=scid.dtype, fillval=scid.fill_value) \ + .write_attr('long_name', 'Radar Scan Id') \ + .write_data(scid) + + # ObsValue: Unfolding Velocity (to compute Nyquist frequency) + obsspace.create_var('ObsValue/unfoldingVelocity', dtype=hnqv.dtype, fillval=hnqv.fill_value) \ + .write_attr('units', 'm s-1') \ + .write_attr('long_name', 'Unfolding Velocity (to compute Nyquist frequency)') \ + .write_data(hnqv) + + # ObsValue: Volume Coverage Pattern + obsspace.create_var('ObsValue/volumeCoveragePattern', dtype=vocp.dtype, fillval=vocp.fill_value) \ + .write_attr('long_name', 'Volume Coverage Pattern') \ + .write_data(vocp) + + # QlalityMarker: Quality Marker For Wind Along Radial Line + obsspace.create_var('QualityMarker/unfoldingVelocity', dtype=qcrw.dtype, fillval=qcrw.fill_value) \ + .write_attr('long_name', 'Quality Marker For Wind Along Radial Line') \ + .write_data(qcrw) + + end_time = time.time() + running_time = end_time - start_time + logger.info(f"Running time for splitting and output IODA: {running_time} seconds") + + logger.info("All Done!") + + +if __name__ == '__main__': + + start_time = time.time() + + parser = argparse.ArgumentParser() + parser.add_argument('-c', '--config', type=str, help='Input JSON configuration', required=True) + parser.add_argument('-v', '--verbose', help='print debug logging information', + action='store_true') + args = parser.parse_args() + + log_level = 'DEBUG' if args.verbose else 'INFO' + logger = Logger('BUFR2IODA_nexrad.py', level=log_level, colored_log=True) + + with open(args.config, "r") as json_file: + config = json.load(json_file) + + bufr_to_ioda(config, logger) + + end_time = time.time() + running_time = end_time - start_time + logger.info(f"Total running time: {running_time} seconds") From 2214018c6b061320be380951795dbf2a103a0893 Mon Sep 17 00:00:00 2001 From: Praveen Singh Date: Thu, 21 Nov 2024 11:13:38 -0600 Subject: [PATCH 2/2] Updated a few variable names and their IODA group --- rrfs-test/IODA/python/bufr2ioda_nexrad.py | 68 +++++++++++------------ 1 file changed, 34 insertions(+), 34 deletions(-) diff --git a/rrfs-test/IODA/python/bufr2ioda_nexrad.py b/rrfs-test/IODA/python/bufr2ioda_nexrad.py index 5d74a6f..81fe9cf 100755 --- a/rrfs-test/IODA/python/bufr2ioda_nexrad.py +++ b/rrfs-test/IODA/python/bufr2ioda_nexrad.py @@ -92,6 +92,9 @@ def bufr_to_ioda(config, logger): q.add('stationIdentification', '*/SSTN') q.add('height', '*/HSMSL') q.add('heightOfAntenna', '*/HSALG') + q.add('volumeIndex', '*/VOID') + q.add('scanIndex', '*/SCID') + q.add('ppiVolume', '*/VOCP') # ObsValue q.add('beamAzimuthAngle', '*/ANAZ') @@ -99,13 +102,10 @@ def bufr_to_ioda(config, logger): q.add('gateRange', '*/NL2RW{1}/DIST125M') q.add('radialVelocity', '*/NL2RW{1}/DMVR') q.add('spectralWidth', '*/NL2RW{1}/DVSW') - q.add('ppiVolume', '*/VOID') - q.add('ppiIndex', '*/SCID') q.add('unfoldingVelocity', '*/HNQV') - q.add('volumeCoveragePattern', '*/VOCP') # QualityMarker - q.add('windAlongRadialLineQM', '*/QCRW') + q.add('radialVelocityQM', '*/QCRW') end_time = time.time() running_time = end_time - start_time @@ -137,6 +137,9 @@ def bufr_to_ioda(config, logger): sstn = r.get('stationIdentification', 'spectralWidth') hsmsl = r.get('height', 'spectralWidth') hsalg = r.get('heightOfAntenna', 'spectralWidth') + void = r.get('volumeIndex', 'spectralWidth') + scid = r.get('sacnIndex', 'spectralWidth') + vocp = r.get('ppiVolume', 'spectralWidth') # MetaData/Observation Time year = r.get('year') @@ -158,13 +161,10 @@ def bufr_to_ioda(config, logger): dist125m = r.get('gateRange', 'spectralWidth') dist125m *= 125 dmrv = r.get('radialVelocity', 'spectralWidth') - void = r.get('ppiVolume', 'spectralWidth') - scid = r.get('ppiIndex', 'spectralWidth') hnqv = r.get('unfoldingVelocity', 'spectralWidth') - vocp = r.get('volumeCoveragePattern', 'spectralWidth') # QualityMarker - qcrw = r.get('windAlongRadialLineQM', 'spectralWidth') + qcrw = r.get('radialVelocityQM', 'spectralWidth') logger.info('Executing QuerySet Done!') end_time = time.time() @@ -178,16 +178,16 @@ def bufr_to_ioda(config, logger): logger.debug(f' sstn shape = {sstn.shape}') logger.debug(f' hsmsl shape = {hsmsl.shape}') logger.debug(f' hsalg shape = {hsalg.shape}') + logger.debug(f' void shape = {void.shape}') + logger.debug(f' scid shape = {scid.shape}') + logger.debug(f' vocp shape = {vocp.shape}') logger.debug(f' anaz shape = {anaz.shape}') logger.debug(f' anel shape = {anel.shape}') logger.debug(f' dist125m shape = {dist125m.shape}') logger.debug(f' dmrv shape = {dmrv.shape}') logger.debug(f' dvsw shape = {dvsw.shape}') - logger.debug(f' void shape = {void.shape}') - logger.debug(f' scid shape = {scid.shape}') logger.debug(f' hnqv shape = {hnqv.shape}') - logger.debug(f' vocp shape = {vocp.shape}') logger.debug(f' qcrw shape = {qcrw.shape}') @@ -197,16 +197,16 @@ def bufr_to_ioda(config, logger): logger.debug(f' sstn type = {sstn.dtype}') logger.debug(f' hsmsl type = {hsmsl.dtype}') logger.debug(f' hsalg type = {hsalg.dtype}') + logger.debug(f' void type = {void.dtype}') + logger.debug(f' scid type = {scid.dtype}') + logger.debug(f' vocp type = {vocp.dtype}') logger.debug(f' anaz type = {anaz.dtype}') logger.debug(f' anel type = {anel.dtype}') logger.debug(f' dist125m type = {dist125m.dtype}') logger.debug(f' dmrv type = {dmrv.dtype}') logger.debug(f' dvsw type = {dvsw.dtype}') - logger.debug(f' void type = {void.dtype}') - logger.debug(f' scid type = {scid.dtype}') logger.debug(f' hnqv type = {hnqv.dtype}') - logger.debug(f' vocp type = {vocp.dtype}') logger.debug(f' qcrw type = {qcrw.dtype}') @@ -272,6 +272,21 @@ def bufr_to_ioda(config, logger): .write_attr('long_name', 'Height Of Antenna Above Ground') \ .write_data(hsalg) + # MetaData: Radar Volume Id + obsspace.create_var('MetaData/volumeIndex', dtype=void.dtype, fillval=void.fill_value) \ + .write_attr('long_name', 'Radar Volume Id') \ + .write_data(void) + + # MetaData: Radar Scan Id + obsspace.create_var('MetaData/scanIndex', dtype=scid.dtype, fillval=scid.fill_value) \ + .write_attr('long_name', 'Radar Scan Id') \ + .write_data(scid) + + # MetaData: Volume Coverage Pattern + obsspace.create_var('MetaData/ppiVolume', dtype=vocp.dtype, fillval=vocp.fill_value) \ + .write_attr('long_name', 'Volume Coverage Pattern') \ + .write_data(vocp) + # ObsValue: Antenna Azimuth Angle obsspace.create_var('ObsValue/beamAzimuthAngle', dtype=anaz.dtype, fillval=anaz.fill_value) \ .write_attr('units', 'degree') \ @@ -297,20 +312,10 @@ def bufr_to_ioda(config, logger): .write_data(dmrv) # ObsValue: Doppler Velocity Spectral Width - obsspace.create_var('ObsValue/spectralWidth', dtype=dvsw.dtype, fillval=dvsw.fill_value) \ - .write_attr('units', 'm s-1') \ - .write_attr('long_name', 'Doppler Velocity Spectral Width') \ - .write_data(dvsw) - - # ObsValue: Radar Volume Id - obsspace.create_var('ObsValue/ppiVolume', dtype=void.dtype, fillval=void.fill_value) \ - .write_attr('long_name', 'Radar Volume Id') \ - .write_data(void) - - # ObsValue: Radar Scan Id - obsspace.create_var('ObsValue/ppiIndex', dtype=scid.dtype, fillval=scid.fill_value) \ - .write_attr('long_name', 'Radar Scan Id') \ - .write_data(scid) + #obsspace.create_var('ObsValue/spectralWidth', dtype=dvsw.dtype, fillval=dvsw.fill_value) \ + # .write_attr('units', 'm s-1') \ + # .write_attr('long_name', 'Doppler Velocity Spectral Width') \ + # .write_data(dvsw) # ObsValue: Unfolding Velocity (to compute Nyquist frequency) obsspace.create_var('ObsValue/unfoldingVelocity', dtype=hnqv.dtype, fillval=hnqv.fill_value) \ @@ -318,13 +323,8 @@ def bufr_to_ioda(config, logger): .write_attr('long_name', 'Unfolding Velocity (to compute Nyquist frequency)') \ .write_data(hnqv) - # ObsValue: Volume Coverage Pattern - obsspace.create_var('ObsValue/volumeCoveragePattern', dtype=vocp.dtype, fillval=vocp.fill_value) \ - .write_attr('long_name', 'Volume Coverage Pattern') \ - .write_data(vocp) - # QlalityMarker: Quality Marker For Wind Along Radial Line - obsspace.create_var('QualityMarker/unfoldingVelocity', dtype=qcrw.dtype, fillval=qcrw.fill_value) \ + obsspace.create_var('QualityMarker/radialVelocity', dtype=qcrw.dtype, fillval=qcrw.fill_value) \ .write_attr('long_name', 'Quality Marker For Wind Along Radial Line') \ .write_data(qcrw)