 A Block IIR GPS satellite | |
| Names | Navstar 42 GPS SVN-42 |
|---|---|
| Mission type | Navigation |
| Operator | U.S. Air Force |
| Mission duration | 10 years (planned) [1] Failed to orbit |
| Spacecraft properties | |
| Spacecraft | GPS IIR |
| Spacecraft type | GPS Block IIR[1] |
| Bus | AS-4000 |
| Manufacturer | Lockheed Martin |
| Launch mass | 2,030 kg (4,480 lb) |
| Start of mission | |
| Launch date | 17 January 1997, 16:28:01 UTC |
| Rocket | Delta II 7925-9.5 (Delta D241) |
| Launch site | Cape Canaveral SLC-17A |
| Contractor | McDonnell Douglas |
| Orbital parameters | |
| Reference system | Geocentric orbit (planned) |
| Regime | Medium Earth orbit (Semi-synchronous) |
| Perigee altitude | 20,200 km |
| Apogee altitude | 20,200 km |
| Inclination | 55.0° |
| Period | 720.0 minutes |
GPS IIR-1 or GPS SVN-42 was the first Block IIR GPS satellite to be launched. It was to have been operated as part of the United States Air Force Global Positioning System. It was launched on 17 January 1997, and was destroyed 13 seconds into its flight due to a malfunction of the Delta II launch vehicle that was carrying it.[2] It was estimated to have cost US$40 million, with its launch vehicle costing US$55 million.[2] The satellite that was used for the GPS IIR-1 mission was the second production IIR satellite, SVN-42.[3]
- ^ a b Krebs, Gunter. "GPS-2R (Navstar-2R)". Gunter's Space Page. Retrieved 11 July 2012.
- ^ a b "Unmanned rocket explodes after liftoff". CNN. 17 January 1997. Retrieved 21 June 2009.
- ^ McDowell, Jonathan (22 January 1997). "Issue 311". Jonathan's Space Report. Archived from the original on 10 August 2011. Retrieved 21 June 2009.
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