The ERS Program (European Remote Sensing satellite system) of the European Space Agency has been one of the most essential part of an important european earth observation program concerning meteorology, climatology, oceanography, land resource management... It has been a core R&D and data archiving activity of CERSAT since its creation, as one of the key elements of the ESA ground segment.

As part of the ERS ground segment, the F-PAF (French Processing and Archiving Facility), so-called CERSAT, was focused on the ocean component of the mission, including the following instruments :

  • radar altimeter (RA)
  • microwave sounder (ATSR/MW)
  • scatterometer (AMI-Wind)
  • SAR Wave Mode (AMI-Wave)

CERSAT provided the R&D effort for the development of the inversion algorithms for each of these instruments to produce geophysical level information. As a data center, it is responsible for the archiving, the processing and dissemination to the user community of these products, including :

  • raw data (Level 0) : unprocessed data directly received from the satellite at the ground station and archived at CERSAT. These data are usually not distributed. They are used for processing to a more geophysical level (level 1 or 2), in delayed mode or for complete reprocessings.
  • FDP (Fast Delivery Products) : near real time products from altimeter, scatterometer and SAR directly processsed at the ground stations and archived and distributed at CERSAT
  • Level 1 and Level 2 products for altimeter, micro-wave sounder and SAR Wave Mode
  • third party products such as colocated datasets of ERS instruments with other satellite missions like QuikSCAT

ERS-2 mission ended on 6th July 2011 but activities around ERS mission legacy still continue. In particular, we are in charge :

  • consolidating and preserving for the long-term the raw data archives for the mentioned instruments
  • performing complete reprocessing campaigns, such as for the SAR Wave Mode or the altimeter (REAPER project)