FDR4ALT is an ESA project aiming at, in the frame of the European Long Term Data Preservation Program (LTDP+) generating innovative Earth system data records named Fundamental Data Records (basically level 1 altimeter and radiometer data) and Thematic Data Records (basically level 2P geophysical products).

These products will be based on the exploitation of measurements acquired by the altimeter and radiometer instruments embarked on-board three remote sensing satellite ERS-1, ERS-2 and ENVISAT.

The goal is to serve the different communities involved in long term data exploitation above the different Earth surfaces : oceancoastalinland waterice sheetssea ice and atmosphere.