 A Block IIR GPS satellite | |
| Mission type | Navigation |
|---|---|
| Operator | US Air Force |
| COSPAR ID | 2004-045A[1] |
| SATCATno. | 28474[1] |
| Mission duration | 10 years (planned)[2] |
| Spacecraft properties | |
| Spacecraft type | GPS Block IIR[2] |
| Bus | AS-4000[2] |
| Manufacturer | Lockheed Martin[2] |
| Launch mass | 2,032 kilograms (4,480 lb)[2] |
| Start of mission | |
| Launch date | 6 November 2004, 05:39:00 (2004-11-06UTC05:39Z) UTC |
| Rocket | Delta II 7925-9.5, D308[3] |
| Launch site | Cape CanaveralSLC-17B[3] |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Medium Earth (Semi-synchronous) |
| Perigee altitude | 19,936 kilometres (12,388 mi)[4] |
| Apogee altitude | 20,426 kilometres (12,692 mi)[4] |
| Inclination | 54.8 degrees[4] |
| Period | 717.94 minutes[4] |
USA-180, also known asGPS IIR-13 andGPS SVN-61, is an Americannavigation satellite which forms part of theGlobal Positioning System. It was the thirteenth of twenty oneBlock IIR GPS satellites to be launched, and the last in the original configuration. It was built byLockheed Martin, using theAS-4000satellite bus.[2]
USA-180 was launched at 05:39:00 UTC on 6 November 2004, atop aDelta II carrier rocket, flight number D308, flying in the 7925-9.5 configuration.[3] The launch took place fromSpace Launch Complex 17B at theCape Canaveral Air Force Station,[5] and placed USA-180 into a transfer orbit. The satellite raised itself intomedium Earth orbit using aStar-37FMapogee motor.[2]
By 5 January 2005, USA-180 was in an orbit with aperigee of 19,936 kilometres (12,388 mi), anapogee of 20,426 kilometres (12,692 mi), aperiod of 717.94 minutes, and 54.8 degrees ofinclination to the equator.[4] It is used to broadcast the PRN 02 signal, and operates in slot 1 of plane D of the GPS constellation. The satellite has a mass of 2,032 kilograms (4,480 lb), and a design life of 10 years.[2] As of 2019 it remains in service.
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