USA-90
| Mission type | Navigation |
|---|---|
| Operator | US Air Force |
| COSPAR ID | 1993-017A[1] |
| SATCAT № | 22581[1] |
| Mission duration | 7.5 years (planned)[2] |
| Spacecraft properties | |
| Spacecraft type | GPS Block IIA[2] |
| Manufacturer | Rockwell[2] |
| Launch mass | 1,816 kilograms (4,004 lb)[2] |
| Start of mission | |
| Launch date | 30 March 1993, 03:09:00 UTC |
| Rocket | Delta II 7925-9.5, D219[3] |
| Launch site | Cape Canaveral LC-17A[3] |
| End of mission | |
| Deactivated | 24 October 2005 |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Medium Earth (Semi-synchronous) |
| Perigee | 20,076 kilometres (12,475 mi)[4] |
| Apogee | 20,287 kilometres (12,606 mi)[4] |
| Inclination | 54.9 degrees[4] |
| Period | 717.96 minutes[4] |
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.[3] The launch took place from Launch Complex 17A at the Cape Canaveral Air Force Station,[5] and placed USA-90 into a transfer orbit. The satellite raised itself into medium Earth orbit using a Star-37XFP apogee motor.[2]
On 2 May 1993, USA-90 was in an orbit with a perigee of 20,076 kilometres (12,475 mi), an apogee of 20,287 kilometres (12,606 mi), a period of 717.96 minutes, and 54.9 degrees of inclination to the equator.[4] It broadcast PRN 31, and operated in slot 3 of plane C of the GPS constellation.[6] The satellite had a mass of 1,816 kilograms (4,004 lb). It had a design life of 7.5 years,[2] and ceased operations on 24 October 2005.
References
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