|Operator||US Air Force|
|Mission duration||7.5 years (planned)|
|Spacecraft type||GPS Block IIA|
|Launch mass||1,816 kilograms (4,004 lb)|
|Start of mission|
|Launch date||26 June 1993, 13:27:00UTC|
|Rocket||Delta II 7925-9.5, D221|
|Launch site||Cape Canaveral LC-17A|
|End of mission|
|Disposal||Placed in a graveyard orbit|
|Deactivated||19 May 2014, 22:00:00UTC|
|Perigee altitude||20,120 kilometres (12,500 mi)|
|Apogee altitude||20,244 kilometres (12,579 mi)|
USA-92, also known as GPS IIA-12, GPS II-21, GPS SVN-39, and NAVSTAR 39, is an American navigation satellite which forms part of the Global Positioning System. It was the twelfth of nineteen Block IIA GPS satellites to be launched.
USA-92 was launched at 13:27:00 UTC on 26 June 1993, atop a Delta II carrier rocket, flight number D221, flying in the 7925-9.5 configuration. The launch took place from Launch Complex 17A at the Cape Canaveral Air Force Station, and placed USA-92 into a transfer orbit. The satellite raised itself into medium Earth orbit using a Star-37XFP apogee motor.
On 27 July 1993, USA-92 was in an orbit with a perigee of 20,120 kilometres (12,500 mi), an apogee of 20,244 kilometres (12,579 mi), a period of 717.96 minutes, and 54.7 degrees of inclination to the equator. It broadcasts the PRN 09 signal, and operates in slot 1 of plane A of the GPS constellation. The satellite has a mass of 1,816 kilograms (4,004 lb). It had a design life of 7.5 years; however, it was kept in service for over 20 years before finally decommissioned from service on May 19, 2014.
Following decommissioning, it was subsequently placed in a disposal orbit approximately 1000 km above the operational constellation on September 21, 2015.
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- Krebs, Gunter. "GPS-2A (Navstar-2A)". Gunter's Space Page. Retrieved 10 July 2012.
- McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 10 July 2012.
- McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 10 July 2012.
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- Wade, Mark. "Navstar". Encyclopedia Astronautica. Retrieved 10 July 2012.
- "NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2014046". United States Coast Guard. Retrieved 21 May 2014.
- "2 SOPS adapts new disposal approval process". United States Air Force. Retrieved 31 October 2015.[permanent dead link]
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