|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||28 March 1996, 00:21:00UTC|
|Rocket||Delta II 7925-9.5, D234|
|Launch site||Cape Canaveral LC-17B|
|End of mission|
|Disposal||Placed in a graveyard orbit|
|Deactivated||2 August 2014, 22:00:00UTC|
|Perigee altitude||20,080 kilometres (12,480 mi)|
|Apogee altitude||20,284 kilometres (12,604 mi)|
USA-117, also known as GPS IIA-16, GPS II-25 and GPS SVN-33, is an American navigation satellite which forms part of the Global Positioning System. It was the sixteenth of nineteen Block IIA GPS satellites to be launched.
USA-117 was launched at 00:21:00 UTC on 28 March 1996, atop a Delta II carrier rocket, flight number D234, flying in the 7925-9.5 configuration. The launch took place from Launch Complex 17B at the Cape Canaveral Air Force Station, and placed USA-117 into a transfer orbit. The satellite raised itself into medium Earth orbit using a Star-37XFP apogee motor.
On 27 April 1996, USA-117 was in an orbit with a perigee of 20,080 kilometres (12,480 mi), an apogee of 20,284 kilometres (12,604 mi), a period of 717.96 minutes, and 54.7 degrees of inclination to the equator. It broadcasts the PRN 03 signal, and operates in slot 2 of plane C 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 actually remained in service until August 2, 2014.
It was subsequently disposed of and currently resides in a disposal orbit approximately 500 km above the operational constellation.
- "Navstar 2A-16". US National Space Science Data Center. Retrieved 10 July 2012.
- Krebs, Gunter. "GPS-2A (Navstar-2A)". Gunter's Space Page. Retrieved 10 July 2012.
- McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 11 July 2012.
- McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 11 July 2012.
- McDowell, Jonathan. "Launch List". Launch Vehicle Database. Jonathan's Space Page. Retrieved 11 July 2012.
- Wade, Mark. "Navstar". Encyclopedia Astronautica. Retrieved 10 July 2012.
- "N2YO.com". Retrieved 18 July 2015.
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