The second European Space Agency's (ESA) Remote Sensing Satellite (ERS-2) ensures the continuity of sea surface measurements begun by ERS-1 in 1991. The spacecraft payload consists of seven instruments: an active microwave instrument (operating in C-band either as a synthetic aperture radar, SAR, or as a wave and wind-scatterometer), a radar altimeter, a global ozone measurement experiment (GOME), a microwave sounder, a precise range and range rate equipment (PRARE), a laser retroreflector array, and an along track scanning radiometer (ATSR). SLR and PRARE are designed to provide two independent tracking systems for ERS-2.

ERS-2 Characteristics: