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SES-1

Field	Value
name	SES-1
names_list	AMC-1R
AMC-4R
OS-1
image_size	300px
mission_type	Communications
operator	SES Americom / SES
COSPAR_ID	2010-016A
SATCAT	36516
website	https://www.ses.com/
mission_duration	15 years (planned)
(elapsed)
spacecraft	OS-1
spacecraft_type	GEOStar-2
spacecraft_bus	Star-2.4
manufacturer	Orbital Sciences Corporation
launch_mass	2561 kg
power	5 kW
launch_date	24 April 2010, 11:19:00 UTC
launch_rocket	Proton-M / Briz-M
launch_site	Baikonur, Site 200/39
launch_contractor	Khrunichev State Research and Production Space Center
entered_service	June 2010
orbit_reference	Geocentric orbit
orbit_regime	Geostationary orbit
orbit_longitude	101° West
apsis	gee
trans_band	48 transponders:
24 C-band
24 Ku-band
trans_bandwidth	36 MHz
trans_coverage	Canada, United States, Mexico, Caribbean, Central America
programme	SES constellation
next_mission	SES-2

AMC-4R OS-1 (elapsed) 24 C-band 24 Ku-band

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

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. It was the third SES World Skies satellite to be launched following the merger, but the first to carry the new SES designation. 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. SES-1 enables high-definition television signals to very small aperture terminals in the United States.

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. At launch, the satellite had a mass of 2561 kg. SES-1 has a design life of fifteen years; however, the spacecraft was launched with enough fuel to operate for at least sixteen years, if all systems remain functional.

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. The launch occurred from Site 200/39 at the Baikonur Cosmodrome, at 11:19:00 UTC on 24 April 2010. The launch successfully placed SES-1 into a subsynchronous orbit close to geostationary altitude.

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. In the end, services provided by AMC-11 were not interrupted.

References

"SES-1 Mission Overview". International Launch Services.
Krebs, Gunter. (11 December 2017). "SES 1, 2, 3". Gunter's Space Page.
McDowell, Jonathan. (14 March 2021). "Launch Log". Jonathan's Space Report.
Bergin, Chris. (24 April 2010). "ILS Proton-M successfully launches with Orbital-built SES-1 satellite". NASASpaceFlight.com.
de Selding, Peter B.. (17 May 2010). "SES Details Plan To Avert Interference by Failed Intelsat Craft". SpaceNews.
de Selding, Peter B.. (3 June 2010). "Intelsat, SES Safely Negotiate Passage of Wayward Craft". SpaceNews.

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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