IMPORTANT information for users of ERS-2 altimetry data regarding:
There are two corrections to the ERS-1 and ERS-2 ranges that were applied to the online Greenland and Antarctica data. The first of these is a correction for a drift in the Ultra-Stable Oscillator(USO). The second is the Scanning Point Target Response(SPTR) correction. The characterization of these two corrections can be found on the ESA Earth Observation web site
The European Space Agency's (ESA) ERS-2 Radar Altimeter Satellite was launched in April of 1995 in an orbit that extended coverage over the ice sheets to +/- 81.5 degrees. In April 2005, the mission reached its 10-year operation. On June 28, 2003, ERS-2 lost its tape recording capabilities, otherwise the mission is still ongoing, with all instruments working and providing excellent data.
ERS-2 satellite was designed as a follow-on satellite to ERS-1. Its main task is therefore to ensure the continuity of data measurements supply to scientists and applications-oriented users. ENVISAT will then follow on ERS-2, offering even more powerful and sophisticated instruments than either ERS-1 and ERS-2.