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The Navy's Geosat Follow-On (GFO) Mission, launched on February 10, 1998, is one in a series of scientific altimetric satellites which include Seasat, Geosat, ERS-1, and TOPEX/POSEIDON (T/P). Data derived from these missions has and will lead to vast improvements in our knowledge of ocean circulation, ice sheet topography, and climate change. In order to capture the maximum amount of information from the altimetric data, accurate altimeter calibrations are required for the civilian data set which NOAA will produce. NASA/Goddard Space Flight Center/Wallops Flight Facility (GSFC/WFF) has provided these products for the Geosat and T/P missions and will do the same for GFO.
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Announcements
GFO End of Mission
Posted: 01/14/2009 09:59 AM

Due to increasing sun exposure (minimal eclipse), the temperature of the GFO platform increased to
the point where normal operations were no longer feasible. The final step was to keep the radar
altimeter (RA) off until after the "full sun" cycle. No GFO data was received after this date September 17, 2008.

The Navy officially declared the GFO Mission was ended as of October 22, 2008.


WVR is back on, RA is being power cycled during eclipse periods.
Posted: 03/19/2007 02:24 PM

The satellite is currently at the end of the 135th repeat cycle -- after a partial resolution of the continuing issues with the batteries, the WVR is back on full time, but the RA is being power cycled so that it is off during eclipse periods. Both these payloads will be cycled on and off as necessary to maintain the satellite electrical power system and prevent satellite resets.


GFO RA and WVR payloads off
Posted: 01/31/2007 01:25 PM

As of 27 January 2007 (2007 027) the satellite has completed 131 exact repeat cycles and has spent over five years on orbit since acceptance of the satellite by the Navy and over eight years on orbit since launch. The satellite is currently in the middle of the 132nd repeat cycle -- due to continuing issues with the batteries, the RA is off as is the WVR. Both these payloads will be cycled on and off as necessary to maintain the satellite electrical power system and prevent satellite resets.


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