 A Block IIF GPS satellite | |
| Mission type | Navigation |
|---|---|
| Operator | US Air Force |
| COSPAR ID | 2011-036A[1] |
| SATCATno. | 37753[1] |
| Mission duration | 12 years (planned) |
| Spacecraft properties | |
| Spacecraft | GPS SVN-63 (IIF-2) |
| Spacecraft type | GPS Block IIF |
| Manufacturer | Boeing |
| Launch mass | 1,630 kilograms (3,590 lb)[2] |
| Start of mission | |
| Launch date | 16 July 2011, 06:41 (2011-07-16UTC06:41Z) UTC |
| Rocket | Delta IV-M+(4,2), D355[3] |
| Launch site | Cape Canaveral SLC-37B[3] |
| Contractor | ULA |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Medium Earth (Semi-synchronous) |
| Perigee altitude | 20,452 kilometers (12,708 mi)[4] |
| Apogee altitude | 20,463 kilometers (12,715 mi)[4] |
| Inclination | 55 degrees[4] |
| Period | 729.16 minutes[4] |
USA-232, also known asGPS IIF-2, andGPS SVN-63, is an Americannavigation satellite which forms part of theGlobal Positioning System. It was the second of twelveBlock IIF satellites to be launched.[2]
Built byBoeing and launched byUnited Launch Alliance, USA-232 was launched at 06:41 UTC on 16 July 2011, atop aDelta IV carrier rocket, flight number D355, flying in the Medium+(4,2) configuration.[3] The launch took place fromSpace Launch Complex 37B at theCape Canaveral Air Force Station,[5] and placed USA-232 directly intomedium Earth orbit.[4]
As of 24 July 2011, USA-232 was in an orbit with aperigee of 20,452 kilometers (12,708 mi), anapogee of 20,463 kilometers (12,715 mi), aperiod of 729.16 minutes, and 55.0 degrees ofinclination to the equator.[4] It is used to broadcast the PRN 01 signal, and operates in slot 2 of plane D of the GPS constellation. The satellite has a design life of 15 years and a mass of 1,630 kilograms (3,590 lb).[2]
On 10 July 2023, the satellite was operating at D2A in the D plane. It experienced a clock anomaly that caused the Space Force’s2nd Space Operations Squadron to set the satellite as “off” (Unhealthy) to all users until further notice. It is operating on its last Rubidium Frequency Standard clock, which demonstrated instances of unpredictable performance starting in January 2023. The GPS community concurred in transferring SVN 63 out of the active constellation and into a test status.[6]
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