Summary
| Names | AMC-1R AMC-4R OS-1 |
|---|---|
| Mission type | Communications |
| Operator | SES Americom / SES S.A. |
| COSPAR ID | 2010-016A |
| SATCAT no. | 36516 |
| Website | https://www.ses.com/ |
| Mission duration | 15 years (planned) 10 years, 11 months, 24 days (elapsed) |
| Spacecraft properties | |
| Spacecraft | OS-1 |
| Spacecraft type | GEOStar-2 |
| Bus | Star-2.4 |
| Manufacturer | Orbital Sciences Corporation |
| Launch mass | 2,561 kg (5,646 lb) |
| Power | 5 kW |
| Start of mission | |
| Launch date | 24 April 2010, 11:19:00 UTC |
| Rocket | Proton-M / Briz-M |
| Launch site | Baikonur, Site 200/39 |
| Contractor | Khrunichev State Research and Production Space Center |
| Entered service | June 2010 |
| Orbital parameters | |
| Reference system | Geocentric orbit |
| Regime | Geostationary orbit |
| Longitude | 101° West |
| Transponders | |
| Band | 48 transponders: 24 C-band 24 Ku-band |
| Bandwidth | 36 MHz |
| Coverage area | Canada, United States, Mexico, Caribbean, Central America |
SES-1 is a geostationary communications satellite which is operated by SES World Skies, then by SES S.A..
History
It was originally ordered by SES Americom as a ground spare for AMC-5R, however in April 2008 a decision was made to launch it, and it was named AMC-1R. It was subsequently renamed AMC-4R, and finally SES-1 after SES Americom merged with SES New Skies to form SES World Skies.[1] It was the third SES World Skies satellite to be launched following the merger, but the first to carry the new SES designation.[2] SES-1 operates in geostationary orbit, and is intended to be located at a longitude of 101° West, where it will replace the AMC-2 and AMC-4 satellites, and be used broadcast high-definition television to very small aperture terminals in the United States.[3]
Spacecraft
SES-1 was built by Orbital Sciences Corporation (OSC), and is based on the Star-2.4 satellite bus. It is equipped with 24 C-band, and 24 Ku-band transponders, and at launch it had a mass of 2,561 kg (5,646 lb). It has a design life of fifteen years, however it was launched with enough fuel to operate for at least sixteen years, if its systems are still functional.[1]
Launch
The launch of SES-1 was conducted by International Launch Services (ILS), using a Proton-M launch vehicle with a Briz-M upper stage.[3] The launch occurred from Site 200/39 at the Baikonur Cosmodrome, at 11:19:00 UTC on 24 April 2010.[2] The launch successfully placed SES-1 into a subsynchronous orbit close to geostationary altitude.[3][4]
Mission
In May and June 2010, SES-1 was positioned close to 131° West to temporarily provide backup to the AMC-11 satellite in the event that AMC-11 could not continue broadcasting whilst it is moved out of the way of the failed Galaxy 15 satellite, which passed close to it at the end of May 2010.[5] In the end, services provided by AMC-11 were not interrupted.[6]
See also
References
- ^ a b Krebs, Gunter (11 December 2017). "SES 1, 2, 3". Gunter's Space Page. Retrieved 11 April 2021.
- ^ a b McDowell, Jonathan (14 March 2021). "Launch Log". Jonathan's Space Report. Retrieved 11 April 2021.
- ^ a b c "SES-1 Mission Overview" (PDF). International Launch Services. Retrieved 21 May 2010.
- ^ Bergin, Chris (24 April 2010). "ILS Proton-M successfully launches with Orbital-built SES-1 satellite". NASASpaceFlight.com. Retrieved 21 May 2010.
- ^ de Selding, Peter B. (17 May 2010). "SES Details Plan To Avert Interference by Failed Intelsat Craft". SpaceNews. Retrieved 21 May 2010.
- ^ de Selding, Peter B. (3 June 2010). "Intelsat, SES Safely Negotiate Passage of Wayward Craft". SpaceNews. Archived from the original on 7 June 2010. Retrieved 7 June 2010. CS1 maint: discouraged parameter (link)