En:sar:envisat

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Révision de 9 mars 2011 à 08:20 par (discussion) (Migration from Dokuwiki)

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Envisat

Envisat data are stored in netCDF files by month and by year.
Two types of storage are done in the aim to facilitate use of comparison tools.

example : ENVISAT_yyyy.nc (with yyyy = year)
example : ENVISAT_yyyymm.nc (with yyyymm = year month)


netCDF file contains four dimensions :

  • time (unlimited)
  • wavenumbers (usually 24)
  • directions (usually 36)
  • partitions (usually 2)


and various variables :

  • time(time)
  • lat(time)
  • lon(time)
  • track_angle(time)
  • incidence_angle(time)
  • k(wavenumbers)
  • phi(directions)
  • snr(time)
  • swh(time)
  • swh_calibrated(time)
  • swh_standard_error(time)
  • swh_part(time,partitions)
  • swh_part_calibrated(time,partitions)
  • swh_part_standard_error(time,partitions)
  • dwl_part(time,partitions)
  • dwl_part_calibrated(time,partitions)
  • dwl_part_standard_error(time,partitions)
  • ddr_part(time,partitions)
  • ddr_part_calibrated(time,partitions)
  • ddr_part_standard_error(time,partitions)
  • dsp_part(time,partitions)
  • dsp_part_standard_error(time,partitions)
  • nv(time)
  • wind_speed_sar(time)
  • wind_speed_sar_calibrated(time)
  • wind_speed_model_u(time)
  • wind_speed_model_v(time)
  • azimuth_cutoff(time)
  • range_cutoff(time)
  • quality_flag(time,partitions)