Template:Infobox spaceflight 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.[1] The launch took place from Launch Complex 17B at the Cape Canaveral Air Force Station,[2] and placed USA-117 into a transfer orbit. The satellite raised itself into medium Earth orbit using a Star-37XFP apogee motor.[3]

On 27 April 1996, USA-117 was in an orbit with a perigee of 20,080 kilometres (Template:Convert/round mi), an apogee of 20,284 kilometres (Template:Convert/round mi), a period of 717.96 minutes, and 54.7 degrees of inclination to the equator.[4] It broadcasts the PRN 03 signal, and operates in slot 2 of plane C of the GPS constellation.[5] The satellite has a mass of 1,816 kilograms (Template:Convert/round lb). It had a design life of 7.5 years;[3] 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.[6]


  1. McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 11 July 2012. 
  2. McDowell, Jonathan. "Launch List". Launch Vehicle Database. Jonathan's Space Page. Retrieved 11 July 2012. 
  3. 3.0 3.1 Krebs, Gunter. "GPS-2A (Navstar-2A)". Gunter's Space Page. Retrieved 10 July 2012. 
  4. McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 11 July 2012. 
  5. Wade, Mark. "Navstar". Encyclopedia Astronautica. Retrieved 10 July 2012. 
  6. "". Retrieved 18 July 2015. 
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