 A Block IIR GPS satellite | |
| Mission type | Navigation |
|---|---|
| Operator | US Air Force |
| COSPAR ID | 2000-040A[1] |
| SATCATno. | 26407[1] |
| Mission duration | 10 years (planned)[2] 24 years, 7 months, 18 days (in progress) |
| 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 | 16 July 2000, 09:17:00 (2000-07-16UTC09:17Z) UTC |
| Rocket | Delta II 7925-9.5, D279[3] |
| Launch site | Cape CanaveralSLC-17A[3] |
| End of mission | |
| Disposal | Decommissioned[4] |
| Deactivated | 19 Dec 2024 |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Medium Earth (Semi-synchronous) |
| Perigee altitude | 20,184 kilometres (12,542 mi)[5] |
| Apogee altitude | 20,426 kilometres (12,692 mi)[5] |
| Inclination | 55 degrees[5] |
| Period | 722.98 minutes[5] |
USA-151, also known asGPS IIR-5,GPS SVN-44, andNavstar-48 is an Americannavigation satellite which forms part of theGlobal Positioning System. It was the fifthBlock IIR GPS satellite to be launched, out of thirteen in the original configuration, and twenty oneoverall. It was built byLockheed Martin, using theAS-4000satellite bus.[2]
USA-151 was launched at 09:17:00 UTC on 16 July 2000, atop aDelta II carrier rocket, flight number D279, flying in the 7925-9.5 configuration.[3] The launch took place fromSpace Launch Complex 17A at theCape Canaveral Air Force Station,[6] and placed USA-151 into a transfer orbit. The satellite raised itself intomedium Earth orbit using aStar-37FMapogee motor.[2]
By 27 July 2000, USA-151 was in an orbit with aperigee of 20,184 kilometres (12,542 mi), anapogee of 20,426 kilometres (12,692 mi), aperiod of 722.98 minutes, and 55 degrees ofinclination to the equator.[5] It is used to broadcast the PRN 28 signal, and operates in slot 3 of plane B of the GPS constellation, having originally been operated in slot 5.[7] The satellite has a mass of 2,032 kilograms (4,480 lb), and a design life of 10 years.[2]
It was originally retired on 23 June 2021.[8] On 14 Aug 2023, it was reactivated to replace SVN-63.[9] It was decommissioned 19 December 2024 ahead of the entry to service ofUSA-440.[4]
It was subsequently reactivated again 22 January 2025 using PRN21.
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