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The generation of sea-ice thickness from CryoSat-2 will resume in October 2019 with an update of the retrieval algorithm and product content. The changes are listed below: 

Altimeter Input Data

  • CryoSat-2 baseline-D data as primary altimeter data since April 28, 2019. NOTE: In v2.2 the reprocessed grid products consist of a mix between baseline-C and baseline-D

Auxiliary Data

  • Use C3S (interim) climate data records of sea ice concentration as auxiliary data for the reprocessed data stream. This fixes an issue with evolving land masks in the OSI-SAF operational products, which will not be reprocessed to a consistent standard. The C3S sea ice type is also known to be more precise in the marginal ice zone

Level-1 Pre-Processor

  • Added support for the new ESA baseline-D netCDF format
  • Increased the regional subset from 50N – 88N in version 2.1 to 45N – 88N

Level-2 Processor

  • Split algorithm between near-real time and reprocessed with timeliness dependent choice of validation data
  • Removed requirement of having a minimum of 3 leads in each orbits.
  • Added sea ice draft and sea ice draft uncertainty as output variables
  • Renamed freeboard to sea ice freeboard to be in line with the variables standard name

Level-3 Processor

  • Added sea ice draft and sea ice draft uncertainty as output variables
  • Renamed freeboard to sea ice freeboard to be in line with the variables standard name
  • Removed the average Level-2 orbit based uncertainty for radar freeboard, sea-ice freeboard and sea-ice thickness
  • All statistical variables are now named with a “stat_” prefix in the variable name for clarity
  • Added temporal statistics variables (see Temporal Coverage per grid cell5.2)
  • Added the fraction of negative thicknesses per grid cell as statistical parameter
  • Added geotiff output (variable sea-ice thickness only) for all gridded products