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Russian communications satellite From Wikipedia, the free encyclopedia
Ekspress-A4 (Russian: Экспресс-A4 meaning Express-A4), is a Russian communications satellite which is operated by Russian Satellite Communications Company (RSCC). It was constructed by NPO PM and Alcatel Space and is based on the MSS-2500-GSO satellite bus.
Names | Экспресс-A1R Express-A1R Ekspress-A No. 4 Express-A4 Ekspress-4A Atlantic Bird 14 |
---|---|
Mission type | Communications |
Operator | Russian Satellite Communications Company (RSCC) |
COSPAR ID | 2002-029A |
SATCAT no. | 27441 |
Website | eng |
Mission duration | 7 years (planned) 17.5 years (achieved) |
Spacecraft properties | |
Spacecraft | Ekspress-A1R |
Spacecraft type | KAUR |
Bus | MSS-2500-GSO |
Manufacturer | NPO PM (bus) Alcatel Space (payload) |
Launch mass | 2,600 kg (5,700 lb) |
Power | 2540 watts |
Start of mission | |
Launch date | 10 June 2002, 01:14:00 UTC |
Rocket | Proton-K / Blok DM-2M |
Launch site | Baikonur, Site 200/39 |
Contractor | Khrunichev State Research and Production Space Center |
Entered service | August 2002 |
End of mission | |
Disposal | Graveyard orbit |
Deactivated | January 2020 |
Orbital parameters | |
Reference system | Geocentric orbit |
Regime | Geostationary orbit |
Longitude | 40° West (2002–2005) 14° West (2005–2015) 145° East (2016–2020) |
Transponders | |
Band | 17 transponders: 12 C-band 5 Ku-band |
Coverage area | Russia |
The launch was contracted by Khrunichev State Research and Production Space Center, and used a Proton-K / Blok DM-2M launch vehicle flying from Site 200/39 at the Baikonur Cosmodrome.[1]
Ekspress-A4 is a Russian geosynchronous communications spacecraft that was launched on 10 June 2002 from Baikonur by a Proton-K launch vehicle at 01:14:00 UTC.[2] The 2,600 kg (5,700 lb) spacecraft carries 12 transponders in C-band and five in Ku-band to provide voice, data, and video communications in Russia.[3]
It is part of the Ekspress network of satellites. Following its launch and on-orbit testing, it was placed in geostationary orbit at 40° West, from where it provides communications services to Russia.[4] It is equipped with seventeen transponders. In January 2020, the satellite was retired and moved to a graveyard orbit above the geostationary orbit.
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