OPS 5118
| Operator | US Air Force |
|---|---|
| Major contractors | Rockwell[1] |
| Bus | GPS Block I |
| Mission type | Navigation Technology |
| Launch date | 26 April 1980, 22:00 UTC |
| Carrier rocket | Atlas E/F SGS-1 34F[2] |
| Launch site | Vandenberg SLC-3E[2] |
| Mission duration | 5 years (planned) 11 years (achieved) |
| Ceased operations | 6 March 1991 |
| COSPAR ID | 1980-032A[3] |
| SATCAT | 11783[3] |
| Mass | 759 kilograms (1,670 lb)[1] |
| Orbital elements | |
| Regime | Semisynchronous medium Earth |
| Inclination | 62.8°[4] |
| Apoapsis | 20,357 kilometres (12,649 mi)[4] |
| Periapsis | 20,006 kilometres (12,431 mi)[4] |
| Orbital period | 717.94 minutes[4] |
OPS 5118, also known as Navstar 6, GPS I-6 and GPS SVN-6, was an American navigation satellite launched in 1980 as part of the Global Positioning System development programme. It was the sixth of eleven Block I GPS satellites to be launched.[1]
OPS 5118 was launched at 22:00 UTC on 26 April 1980, atop an Atlas E/F carrier rocket with an SGS-1 upper stage. The Atlas used had the serial number 34F, and was originally built as an Atlas F.[2] The launch took place from Space Launch Complex 3E at Vandenberg Air Force Base,[5] and placed OPS 5118 into a transfer orbit. The satellite raised itself into medium Earth orbit using a Star-27 apogee motor.[1]
By 27 May 1980, OPS 5118 had been raised to an orbit with a perigee of 20,006 kilometres (12,431 mi), an apogee of 20,357 kilometres (12,649 mi), a period of 717.94 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 (1,670 lb).[1] It broadcast the PRN 09 signal in the GPS demonstration constellation, and was retired from service on 6 March 1991.
References [edit]
- ^ a b c d e Krebs, Gunter. "GPS (Navstar)". Gunter's Space Page. Retrieved 12 July 2012.
- ^ a b c McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 12 July 2012.
- ^ a b "Navstar 6". US National Space Science Data Center. Retrieved 25 June 2012.
- ^ a b c d e McDowell, Jonathan. "Satellite Catalog". Jonathan's Space Page. Retrieved 12 July 2012.
- ^ McDowell, Jonathan. "Launch List". Launch Vehicle Database. Jonathan's Space Page. Retrieved 12 July 2012.
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