USA-90

USA-90, also known as GPS IIA-10, GPS II-19 and GPS SVN-31, was an American navigation satellite which formed part of the Global Positioning System. It was the tenth of nineteen Block IIA GPS satellites to be launched.

USA-90 was launched at 03:09:00 UTC on 30 March 1993, atop a Delta II carrier rocket, flight number D219, 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-90 into a transfer orbit. The satellite raised itself into medium Earth orbit using a Star-37XFP apogee motor.

On 2 May 1993, USA-90 was in an orbit with a perigee of 20076 km, an apogee of 20287 km, a period of 717.96 minutes, and 54.9 degrees of inclination to the equator. It broadcast PRN 31, and operated in slot 3 of plane C of the GPS constellation. The satellite had a mass of 1816 kg. It had a design life of 7.5 years, and ceased operations on 24 October 2005.