[gradsusr] Error opening IFREMER NETCDF file
J43
webmaster at meteorologic.net
Tue Mar 29 09:44:13 EDT 2016
Hi,
Projection of netcdf Ifremer has singular, try vonert netvdf to grib
file cdo and reproj grib file with over projection
Best regards,
Jeremy
Le 29/03/2016 15:03, Morwakoma Matabane a écrit :
>
> Encountered error attempting to open the IFREMER wave netcdf file.
>
> ga-> sdfopen
> GW_L2P_ALT_JAS2_NRT_20160317_005948_20160317_031231_283_225.nc
>
> Scanning self-describing file:
> GW_L2P_ALT_JAS2_NRT_20160317_005948_20160317_031231_283_225.nc
>
> gadsdf: SDF file has no discernable X coordinate.
>
> The ncdump –h output:
>
> netcdf GW_L2P_ALT_CRYO_GDR_20160113_063059_20160113_071210_075_273 {
> dimensions:
> time = 2366 ;
> variables:
> double time(time) ;
> time:_FillValue = 0. ;
> time:long_name = "time (seconds since 1985-01-01)" ;
> time:standard_name = "time" ;
> time:units = "seconds since 1985-01-01 00:00:00.0" ;
> time:calendar = "gregorian" ;
> double lat(time) ;
> lat:_FillValue = 0. ;
> lat:long_name = "latitude" ;
> lat:standard_name = "latitude" ;
> lat:units = "degrees_north" ;
> lat:comment = "Positive latitude is North latitude,
> negative latitude is South latitude" ;
> double lon(time) ;
> lon:_FillValue = 0. ;
> lon:long_name = "longitude" ;
> lon:standard_name = "longitude" ;
> lon:units = "degrees_east" ;
> lon:comment = "East longitude relative to Greenwich
> meridian" ;
> short swh(time) ;
> swh:_FillValue = 32767s ;
> swh:long_name = "Ku band corrected significant
> waveheight" ;
> swh:standard_name =
> "sea_surface_wave_significant_height" ;
> swh:units = "m" ;
> swh:quality_flag = "swh_quality" ;
> swh:scale_factor = 0.001 ;
> swh:coordinates = "lon lat" ;
> swh:comment = "All instrumental corrections
> included. Uncalibrated" ;
> short swh_calibrated(time) ;
> swh_calibrated:_FillValue = 32767s ;
> swh_calibrated:long_name = "Ku band calibrated
> significant waveheight" ;
> swh_calibrated:standard_name =
> "sea_surface_wave_significant_height" ;
> swh_calibrated:units = "m" ;
> swh_calibrated:calibration_formula = "1.0058*swh +
> -0.1057" ;
> swh_calibrated:calibration_reference = "Queffeulou
> P & Croize-Fillon D, June 2009, Global altimeter SWH data set, IFREMER" ;
> swh_calibrated:quality_flag = "swh_quality" ;
> swh_calibrated:scale_factor = 0.001 ;
> swh_calibrated:coordinates = "lon lat" ;
> swh_calibrated:comment = "All instrumental
> corrections included. Calibrated" ;
> byte swh_quality(time) ;
> swh_quality:_FillValue = 127b ;
> swh_quality:long_name = "quality of Ku band
> significant waveheight measurement" ;
> swh_quality:flag_values = 0b, 1b, 2b ;
> swh_quality:flag_meanings = "good_measurement
> acceptable_for_some_applications bad_measurement" ;
> short swh_standard_error(time) ;
> swh_standard_error:_FillValue = 32767s ;
> swh_standard_error:long_name = "best estimate of
> significant waveheight standard error" ;
> swh_standard_error:units = "m" ;
> swh_standard_error:source = "GlobWave Wave Data
> Quality Report" ;
> swh_standard_error:scale_factor = 0.001 ;
> swh_standard_error:coordinates = "lon lat" ;
> swh_standard_error:comment = "Standard error
> calculated from buoy colocations, see GlobWave Product User Guide" ;
> short sigma0(time) ;
> sigma0:_FillValue = 32767s ;
> sigma0:long_name = "Ku band corrected backscatter
> coefficient" ;
> sigma0:units = "dB" ;
> sigma0:quality_flag = "sigma0_quality" ;
> sigma0:scale_factor = 0.01 ;
> sigma0:coordinates = "lon lat" ;
> sigma0:comment = "All instrumental corrections
> included. Uncalibrated" ;
> short sigma0_calibrated(time) ;
> sigma0_calibrated:_FillValue = 32767s ;
> sigma0_calibrated:long_name = "Ku band calibrated
> backscatter coefficient" ;
> sigma0_calibrated:units = "dB" ;
> sigma0_calibrated:calibration_formula = "N/A" ;
> sigma0_calibrated:calibration_reference = "N/A" ;
> sigma0_calibrated:quality_flag = "sigma0_quality" ;
> sigma0_calibrated:scale_factor = 0.01 ;
> sigma0_calibrated:coordinates = "lon lat" ;
> sigma0_calibrated:comment = "All instrumental
> corrections included. Calibrated" ;
> byte sigma0_quality(time) ;
> sigma0_quality:_FillValue = 127b ;
> sigma0_quality:long_name = "quality of Ku band
> backscatter coefficient" ;
> sigma0_quality:flag_values = 0b, 1b, 2b ;
> sigma0_quality:flag_meanings = "good_measurement
> acceptable_for_some_applications bad_measurement" ;
> short wind_speed_alt(time) ;
> wind_speed_alt:_FillValue = 32767s ;
> wind_speed_alt:long_name = "altimeter wind speed" ;
> wind_speed_alt:standard_name = "wind_speed" ;
> wind_speed_alt:units = "m s-1" ;
> wind_speed_alt:scale_factor = 0.01 ;
> wind_speed_alt:coordinates = "lon lat" ;
> short wind_speed_alt_calibrated(time) ;
> wind_speed_alt_calibrated:_FillValue = 32767s ;
> wind_speed_alt_calibrated:long_name = "calibrated
> altimeter wind speed" ;
> wind_speed_alt_calibrated:standard_name =
> "wind_speed" ;
> wind_speed_alt_calibrated:units = "m s-1" ;
> wind_speed_alt_calibrated:calibration_formula = "N/A" ;
> wind_speed_alt_calibrated:calibration_reference = "N/A" ;
> wind_speed_alt_calibrated:scale_factor = 0.01 ;
> wind_speed_alt_calibrated:coordinates = "lon lat" ;
> short wind_speed_model_u(time) ;
> wind_speed_model_u:_FillValue = 32767s ;
> wind_speed_model_u:long_name = "U component of the
> model wind vector" ;
> wind_speed_model_u:standard_name = "wind_speed" ;
> wind_speed_model_u:units = "m s-1" ;
> wind_speed_model_u:source = "atmospheric model" ;
> wind_speed_model_u:institution = "ECMWF" ;
> wind_speed_model_u:scale_factor = 0.01 ;
> wind_speed_model_u:coordinates = "lon lat" ;
> short wind_speed_model_v(time) ;
> wind_speed_model_v:_FillValue = 32767s ;
> wind_speed_model_v:long_name = "V component of the
> model wind vector" ;
> wind_speed_model_v:standard_name = "wind_speed" ;
> wind_speed_model_v:units = "m s-1" ;
> wind_speed_model_v:source = "atmospheric model" ;
> wind_speed_model_v:institution = "ECMWF" ;
> wind_speed_model_v:scale_factor = 0.01 ;
> wind_speed_model_v:coordinates = "lon lat" ;
> int rejection_flags(time) ;
> rejection_flags:_FillValue = 2147483647 ;
> rejection_flags:long_name = "consolidated
> instrument and ice flags" ;
> rejection_flags:flag_masks = 1, 2048, 4096, 8192,
> 16384, 32768, 65536, 262144, 524288, 1048576, 8388608, 16777216,
> 33554432, 67108864, 134217728, 1073741824, -2147483648 ;
> rejection_flags:flag_meanings = "flag_rejection
> ice_flag quality_of_off_nadir_from_platform
> quality_of_off_nadir_from_waveform quality_of_C_band_sigma0
> quality_of_orbit quality_of_C_band_swh quality_of_Ku_band_sigma0
> quality_of_Ku_band_swh quality_of_range_estimate
> corruption_of_radiometer_measurement
> corruption_of_altimeter_measurement radiometer_land_flag
> altimeter_ocean_flag altimeter_land_flag attitude_status
> hardware_status" ;
> short swh_rms(time) ;
> swh_rms:_FillValue = 32767s ;
> swh_rms:long_name = "RMS of the Ku band significant
> waveheight" ;
> swh_rms:units = "m" ;
> swh_rms:scale_factor = 0.001 ;
> swh_rms:coordinates = "lon lat" ;
> byte swh_num_valid(time) ;
> swh_num_valid:_FillValue = 127b ;
> swh_num_valid:long_name = "number of valid points
> used to compute Ku band significant waveheight" ;
> swh_num_valid:units = "count" ;
> swh_num_valid:valid_min = 0b ;
> swh_num_valid:valid_max = 10b ;
> swh_num_valid:coordinates = "lon lat" ;
> short sigma0_rms(time) ;
> sigma0_rms:_FillValue = 32767s ;
> sigma0_rms:long_name = "RMS of the Ku band
> backscatter coefficient" ;
> sigma0_rms:units = "dB" ;
> sigma0_rms:scale_factor = 0.01 ;
> sigma0_rms:coordinates = "lon lat" ;
> short off_nadir_angle_pf(time) ;
> off_nadir_angle_pf:_FillValue = 32767s ;
> off_nadir_angle_pf:long_name = "square of the off
> nadir angle computed from platform data" ;
> off_nadir_angle_pf:units = "degree2" ;
> off_nadir_angle_pf:scale_factor = 0.0001 ;
> off_nadir_angle_pf:coordinates = "lon lat" ;
> off_nadir_angle_pf:add_offset = 0.0161 ;
> short range_rms(time) ;
> range_rms:_FillValue = 32767s ;
> range_rms:long_name = "RMS of the Ku band range" ;
> range_rms:units = "m" ;
> range_rms:scale_factor = 0.0001 ;
> range_rms:coordinates = "lon lat" ;
> short bathymetry(time) ;
> bathymetry:_FillValue = 32767s ;
> bathymetry:long_name = "ocean depth" ;
> bathymetry:units = "m" ;
> bathymetry:source = "GEBCO/30s" ;
> bathymetry:institution = "IOC/IHO/GSFC" ;
> bathymetry:scale_factor = 1. ;
> bathymetry:add_offset = 0 ;
> bathymetry:coordinates = "lon lat" ;
> short distance_to_coast(time) ;
> distance_to_coast:_FillValue = 32767s ;
> distance_to_coast:long_name = "distance to nearest
> coast" ;
> distance_to_coast:units = "km" ;
> distance_to_coast:source = "GEBCO/1min" ;
> distance_to_coast:institution = "IOC/IHO/GSFC" ;
> distance_to_coast:scale_factor = 1. ;
> distance_to_coast:coordinates = "lon lat" ;
> short sea_surface_temperature(time) ;
> sea_surface_temperature:_FillValue = 32767s ;
> sea_surface_temperature:long_name = "sea surface
> temperature" ;
> sea_surface_temperature:standard_name =
> "sea_surface_temperature" ;
> sea_surface_temperature:units = "K" ;
> sea_surface_temperature:source = "atmospheric model" ;
> sea_surface_temperature:institution = "ECMWF" ;
> sea_surface_temperature:scale_factor = 0.01 ;
> sea_surface_temperature:coordinates = "lon lat" ;
> short surface_air_temperature(time) ;
> surface_air_temperature:_FillValue = 32767s ;
> surface_air_temperature:long_name = "surface air
> temperature" ;
> surface_air_temperature:units = "K" ;
> surface_air_temperature:source = "atmospheric model" ;
> surface_air_temperature:institution = "ECMWF" ;
> surface_air_temperature:scale_factor = 0.01 ;
> surface_air_temperature:coordinates = "lon lat" ;
> short surface_air_pressure(time) ;
> surface_air_pressure:_FillValue = 32767s ;
> surface_air_pressure:long_name = "surface air
> pressure" ;
> surface_air_pressure:standard_name =
> "air_pressure_at_sea_level" ;
> surface_air_pressure:units = "Pa" ;
> surface_air_pressure:source = "atmospheric model" ;
> surface_air_pressure:institution = "ECMWF" ;
> surface_air_pressure:scale_factor = 1. ;
> surface_air_pressure:add_offset = 75000 ;
> surface_air_pressure:coordinates = "lon lat" ;
>
> // global attributes:
> :Conventions = "CF-1.4" ;
> :title = "GlobWave L2P derived from CRYOSAT IGDR
> Product" ;
> :source = "radar altimeter" ;
> :project = "ESA GlobWave" ;
> :institution = "GlobWave" ;
> :history = "2016-01-25T14:05:12 UTC : Creation;\n",
> "2016-01-26T14:41:03 UTC : ECMWF data
> added" ;
> :contact = "SatOC e.ash at satoc.eu
> <mailto:e.ash at satoc.eu>" ;
> :references = "GlobWave Product User Guide" ;
> :processing_center = "Ifremer" ;
> :software_version = "SatOC GlobWave Cryosat IGDR to
> L2P Processor 1.3" ;
> :source_provider = "NOAA" ;
> :mission_name = "CRYOSAT2" ;
> :source_name = "c2p0273c075.nc" ;
> :source_version = "N/A" ;
> :source_software = "N/A" ;
> :altimeter_sensor_name = "N/A" ;
> :radiometer_sensor_name = "N/A" ;
> :acq_station_name = "N/A" ;
> :cycle_number = "075" ;
> :pass_number = "273" ;
> :equator_crossing_time =
> "2016-01-13T06:55:46.944131 UTC" ;
> :equator_crossing_longitude = 220.276208 ;
> :start_date = "2016-01-13T06:30:59.123262 UTC" ;
> :stop_date = "2016-01-13T07:12:10.458630 UTC" ;
> }
>
> Help appreciated.
>
> Regards
>
> Morwakoma
>
> -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Morwakoma M Matabane ( Research Scientist )
>
> South African Weather Service 442 Rigel Avenue South Erasmusrand
> Pretoria 0181
>
> Cell: _+27-79-755-3342_Tel: _+27-12-367-6234_Fax: _+27-12-367-6189_
>
> E-mail: _morwakoma.matabane at weathersa.co.za
> <mailto:morwakoma.matabane at weathersa.co.za>_ Website:
> _www.weathersa.co.za <http://www.weathersa.co.za/>___
>
> //
>
> /“Climate Knowledge for Climate Action”/
>
> /"Big whorls have little whorls that feed on their velocity, and
> little whorls have lesser whorls and so on to viscosity", Lewis F
> Richardson./
>
> /-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------/
>
>
>
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> gradsusr at gradsusr.org
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