| MISSION |
TIME SPAN |
REPEAT CYCLE(DAYS) |
OBJECTIVE |
| SeaSat |
July 1978 - October 1978 |
3 |
Study oceanographic phenomena |
| GeoSat |
November 1986 - January 1990 |
17 , 176 |
Measure sea surface heights |
| ERS-1 |
July 1991 - June 1996 |
3, 35, 168 |
Measure ice sheet surface elevations over Antarctica and Greenland |
| ERS-2 |
May 1995 - June 2003 |
35 |
Measure ice sheet elevations over Antarctica and Greenland |
| GFO (GeoSat Follow-on) |
February 1998 - October 2008 |
17 |
Provide operation altimetry data for the US Navy and NOAA |
| ENVISAT |
March 2002 - April 2012 |
35 |
Continuation and improvement of ERS satellite measurements |
| CRYOSAT-2 |
Launched April 8th, 2010 |
369 (30 day subcycle) |
Measure Earth's continental ice sheet thickness and test prediction of thinning arctic ice due to global warming |
