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.