Credits US Navy
Satellite Geosat Follow-On
Launched February 10, 1998
Mission Mesure ocean topography
Altitude 880 km
Inclination 108° (non-sun-synchronous)

GFO, Geosat Follow-On was launched in February 1998, and retired in November 2008. Its mission is to provide real-time ocean topography data to the US Navy. Scientific and commercial users have access to these data through NOAA (National Oceanic and Atmospheric Administration). Its primary payload is a radar altimeter.

GFO follows the 17-day repetitive orbit of Geosat.

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