SES-1

Last updated

SES-1
NamesAMC-1R
AMC-4R
OS-1
Mission type Communications
Operator SES Americom / SES S.A.
COSPAR ID 2010-016A OOjs UI icon edit-ltr-progressive.svg
SATCAT no. 36516
Website https://www.ses.com/
Mission duration15 years (planned)
12 years, 3 months, 27 days (elapsed)
Spacecraft properties
SpacecraftOS-1
Spacecraft type GEOStar-2
Bus Star-2.4
Manufacturer Orbital Sciences Corporation
Launch mass2,561 kg (5,646 lb)
Power5 kW
Start of mission
Launch date24 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 serviceJune 2010
Orbital parameters
Reference system Geocentric orbit
Regime Geostationary orbit
Longitude101° West
Transponders
Band48 transponders:
24 C-band
24 Ku-band
Bandwidth36 MHz
Coverage areaCanada, United States, Mexico, Caribbean, Central America
SES-2  →
 

SES-1 is a geostationary communications satellite which is operated by SES World Skies, then by SES S.A.

Contents

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

Related Research Articles

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References

  1. 1 2 Krebs, Gunter (11 December 2017). "SES 1, 2, 3". Gunter's Space Page. Retrieved 11 April 2021.
  2. 1 2 McDowell, Jonathan (14 March 2021). "Launch Log". Jonathan's Space Report. Retrieved 11 April 2021.
  3. 1 2 3 "SES-1 Mission Overview" (PDF). International Launch Services. Retrieved 21 May 2010.
  4. ↑ Bergin, Chris (24 April 2010). "ILS Proton-M successfully launches with Orbital-built SES-1 satellite". NASASpaceFlight.com. Retrieved 21 May 2010.
  5. ↑ de Selding, Peter B. (17 May 2010). "SES Details Plan To Avert Interference by Failed Intelsat Craft". SpaceNews. Archived from the original on 2 February 2013. Retrieved 21 May 2010.
  6. ↑ 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.
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