OPS 5113
| Mission type | Navigation Technology |
|---|---|
| Operator | US Air Force |
| COSPAR ID | 1978-093A[1] |
| SATCAT № | 11054[1] |
| Mission duration | 5 years (planned) 13 1⁄2 years (achieved) |
| Spacecraft properties | |
| Spacecraft type | GPS Block I |
| Manufacturer | Rockwell[2] |
| Launch mass | 759 kilograms (1,673 lb)[2] |
| Start of mission | |
| Launch date | 7 October 1978, 00:28 UTC |
| Rocket | Atlas E/F SGS-1, 47F[3] |
| Launch site | Vandenberg SLC-3E[3] |
| End of mission | |
| Deactivated | 18 May 1992 |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Medium Earth (Semi-synchronous) |
| Perigee | 20,181 kilometres (12,540 mi)[4] |
| Apogee | 20,186 kilometres (12,543 mi)[4] |
| Inclination | 62.8 degrees[4] |
| Period | 718.02 minutes[4] |
OPS 5113, also known as Navstar 3, GPS I-3 and GPS SVN-3, was an American navigation satellite launched in 1978 as part of the Global Positioning System development programme. It was the third of eleven Block I GPS satellites to be launched.[2]
Contents
Launch
OPS 5113 was launched at 00:28 UTC on 7 October 1978, atop an Atlas E/F carrier rocket with an SGS-1 upper stage. The Atlas used had the serial number 47F, and was originally built as an Atlas F.[3] The launch took place from Space Launch Complex 3E at Vandenberg Air Force Base,[5] and placed OPS 5113 into a transfer orbit. The satellite raised itself into medium Earth orbit using a Star-27 apogee motor.[2]
Orbit
By 8 November 1978, OPS 5113 was in an orbit with a perigee of 20,181 kilometres (12,540 mi), an apogee of 20,186 kilometres (12,543 mi), a period of 718.02 minutes, and 62.8 degrees of inclination to the equator.[4] The satellite had a design life of 5 years and a mass of 758 kilograms (1,671 lb).[2] It broadcast the PRN 06 signal in the GPS demonstration constellation, and was retired from service on 18 May 1992.
See also
References
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