| Names | Navstar 2-09 GPS II-9 GPS SVN-15 |
|---|---|
| Mission type | Navigation |
| Operator | U.S. Air Force |
| COSPAR ID | 1990-088A |
| SATCAT no. | 20830 |
| Mission duration | 7.5 years (planned) 16.5 years (achieved) |
| Spacecraft properties | |
| Spacecraft | GPS II |
| Spacecraft type | GPS Block II[1] |
| Manufacturer | Rockwell International |
| Launch mass | 840 kg (1,850 lb) [2] |
| Dimensions | 5.3 m (17 ft) of long |
| Power | 710 watts |
| Start of mission | |
| Launch date | 1 October 1990, 21:56:00 UTC |
| Rocket | Delta II 6925-9.5 (Delta D199) [3] |
| Launch site | Cape Canaveral, LC-17A |
| Contractor | McDonnell Douglas |
| Entered service | 31 October 1990 |
| End of mission | |
| Declared | 17 November 2006 |
| Deactivated | 14 March 2007 |
| Orbital parameters | |
| Reference system | Geocentric orbit[4] |
| Regime | Medium Earth orbit (Semi-synchronous) |
| Slot | D5 (slot 5 plane D) |
| Perigee altitude | 19,972 km (12,410 mi) |
| Apogee altitude | 20,390 km (12,670 mi) |
| Inclination | 54.9° |
| Period | 717.94 minutes |
USA-64, also known as GPS II-9 and GPS SVN-15, was an American navigation satellite which formed part of the Global Positioning System. It was the last of nine Block II GPS satellites to be launched, which were the first operational GPS satellites to fly. It was also the last Block II satellite to be retired from service.
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