Minimize Level-1 ADFs

Besides instrumental data (Level-0 SRAL and Level-0 MWR products), additional data are requested on input of the Level-1 processing aimed at building Level-1 products.

These data correspond to the Sentinel-3 system (e.g. orbit, instrumental characterisation, configuration data i.e. processing parameters, geophysical constants, land/sea mask, ...).

Data requested on input of the SRAL Level-0 and Level-1 data processing consist of:

  • NAVATT packets containing in navigation data (satellite position and velocity vectors) – backup solution to compute location, satellite altitude and orbital altitude rate
  • Orbit State Vector (together with orbit characteristics) to be used with an ESA orbit CFI – to compute location, satellite altitude and orbital altitude rate
  • SRAL instrumental characterization data – to account for the instrumental features
  • USO frequency - to correct altimeter ranges for USO drift
  • Internal calibration (CAL1 and CAL2) Long Term Monitoring parameters
  • TAI/UTC relationship file used to convert TAI time into UTC time
  • Configuration data, i.e. tuning parameters used in the processing steps by the algorithms
  • Universal constants file and "Land/Sea" mask file