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SARAL-AltiKa Data Products

There are three different data products shall be produced and distributed to the users:

  • Operational Geophysical Data Record (OGDR) produced in near real time,
  • Interim Geophysical Data Record (IGDR) produced in 1 to 1.5 days,
  • Geophysical Data Record (GDR) produced in 60 days.

The first one is a NRT product. The other two are OFL products

In addition to the native NetCdf format a 1Hz BUFR-formatted dataset from the OGDR family (OGDR-BUFR) for distribution via the World Meteorological Organization (WMO) Global Tele-communication System (GTS) and EUMETCast is also generated.

Netcdf OGDR/IGDR/GDR products will have the same information and format. The only difference will be related to auxiliary data (orbit, meteo files, calibrations, ...).

Taking into account Jason-1/2 heritage, products will be split into several data sets

  • One "reduced" file, close to the current Jason-1/2 NRT-SSHA, limited to 1 Hz sampling,
  • One "standard" file, close to the current Jason-1/2 I/GDR, containing 1 Hz and 40 Hz values,
  • One "expertise" file, close to the current Jason-1/2 SGDR, containing 1 Hz, 40 Hz and waveforms values. This file will not be generated in NRT.

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