USA-94
 A Block IIA GPS satellite |
|
| Operator | US Air Force |
|---|---|
| Major contractors | Rockwell[1] |
| Bus | GPS Block IIA[1] |
| Mission type | Navigation |
| Launch date | 30 August 1993, 12:38:00 UTC |
| Carrier rocket | Delta II 7925-9.5 D222[2] |
| Launch site | Cape Canaveral LC-17B[2] |
| Mission duration | 7.5 years (planned)[1] 19.6 years (achieved) |
| Ceased operations | 1 May 2013[3] |
| COSPAR ID | 1993-054A[4] |
| SATCAT | 22779[4] |
| Mass | 1,816 kilograms (4,000 lb)[1] |
| Orbital elements | |
| Regime | Semisynchronous medium Earth |
| Inclination | 54.8°[5] |
| Apoapsis | 20,257 kilometres (12,587 mi)[5] |
| Periapsis | 20,109 kilometres (12,495 mi)[5] |
| Orbital period | 718 minutes[5] |
USA-94, also known as GPS IIA-13, GPS II-22 and GPS SVN-35, was an American navigation satellite which formed part of the Global Positioning System. It was the thirteenth of nineteen Block IIA GPS satellites to be launched.
USA-94 was launched at 12:38:00 UTC on 30 August 1993, atop a Delta II carrier rocket, flight number D222, flying in the 7925-9.5 configuration.[2] The launch took place from Launch Complex 17B at the Cape Canaveral Air Force Station,[6] and placed USA-94 into a transfer orbit. The satellite raised itself into medium Earth orbit using a Star-37XFP apogee motor.[1]
On 1 October 1993, USA-94 was in an orbit with a perigee of 20,109 kilometres (12,495 mi), an apogee of 20,257 kilometres (12,587 mi), a period of 718 minutes, and 54.8 degrees of inclination to the equator.[5] It broadcast the PRN 30 signal, and operated in slot 4, and later 5, of plane B of the GPS constellation.[7] The satellite had a mass of 1,816 kilograms (4,000 lb) and a design life of 7.5 years.[1] It was decommissioned on 1 May 2013, after almost 20 years in orbit.[3]
References [edit]
- ^ a b c d e f Krebs, Gunter. "GPS-2A (Navstar-2A)". Gunter's Space Page. Retrieved 10 July 2012.
- ^ a b c McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 10 July 2012.
- ^ a b "NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013027". United States Coast Guard. Retrieved 3 May 2013.
- ^ a b "Navstar 2A-13". US National Space Science Data Center. Retrieved 10 July 2012.
- ^ a b c d e McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 10 July 2012.
- ^ McDowell, Jonathan. "Launch List". Launch Vehicle Database. Jonathan's Space Page. Retrieved 10 July 2012.
- ^ Wade, Mark. "Navstar". Encyclopedia Astronautica. Retrieved 10 July 2012.
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