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

SES-1

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) 12 years, 5 months, 9 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 constellation SES-2 →

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

• 2010 in spaceflight

References

На других языках

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[de] SES-1

SES-1 (Anfangs als AMC-4R, dann als AMC-1R bzw. AMC-5RR bezeichnet) ist ein kommerzieller Kommunikationssatellit des niederländischen Satellitenbetreibers SES World Skies. Er ist der erste Satellit der SES-Serie.

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- [en] SES-1

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