Ekspress-A4 (russian: Экспресс-A4 meaning Express-A4), is a Russian

communications satellite A communications satellite is an artificial satellite that relays and amplifies radio telecommunication signals via a transponder; it creates a communication channel between a source transmitter and a receiver at different locations on Earth. C ...

which is operated by

Russian Satellite Communications Company Federal State Unitary Enterprise Satellite Communications (russian: ФГУП «Космическая связь») or Russian Satellite Communications Company is the main state operator of communications satellites. It is the Russian operator ...

(RSCC). It was constructed by

NPO PM JSC Information Satellite Systems Reshetnev (russian: Информационные спутниковые системы имени академика М. Ф. Решетнёва, Informatsionnye sputnikovye systemy imeny akademika M. F. Reshetnyov ...

and

Alcatel Space Thales Alenia Space () is a Franco-Italian aerospace manufacturer. A joint venture between the French technology corporation Thales Group (67%) and Italian defense conglomerate Leonardo (33%), the company is the largest satellite manufacture ...

and is based on the MSS-2500-GSO

satellite bus A satellite bus (or spacecraft bus) is the main body and structural component of a satellite or spacecraft, in which the payload and all scientific instruments are held. Bus-derived satellites are opposed to specially produced satellites. Bus-d ...

Satellite

The launch was contracted by

Khrunichev State Research and Production Space Center The Khrunichev State Research and Production Space Center (''Государственный космический научно-производственный центр (ГКНПЦ) имени М. В. Хру́ничева'' in Russian) is a ...

, and used a

Proton-K The Proton-K, also designated Proton 8K82K after its GRAU index or SL-12 after its model number, 8K82K, was a Russian, previously Soviet, carrier rocket derived from the earlier Proton. It was built by Khrunichev, and launched from sites 81 and ...

/ Blok DM-2M

launch vehicle A launch vehicle or carrier rocket is a rocket designed to carry a payload (spacecraft or satellites) from the Earth's surface to outer space. Most launch vehicles operate from a launch pad, launch pads, supported by a missile launch contro ...

flying from Site 200/39 at the

Baikonur Cosmodrome The Baikonur Cosmodrome ( kk, Байқоңыр ғарыш айлағы, translit=Baiqoñyr ğaryş ailağy, ; russian: Космодром Байконур, translit=Kosmodrom Baykonur, ) is a spaceport in an area of southern Kazakhstan leased to R ...

Launch

Ekspress-A4 is a Russian geosynchronous communications spacecraft that was launched on 10 June 2002 from Baikonur by a

at 01:14:00 UTC. The spacecraft carries 12

transponders In telecommunications, a transponder is a device that, upon receiving a signal, emits a different signal in response. The term is a blend of ''transmitter'' and ''responder''. In air navigation or radio frequency identification, a flight trans ...

in C-band and five in

Ku-band The Ku band () is the portion of the electromagnetic spectrum in the microwave range of frequencies from 12 to 18 gigahertz (GHz). The symbol is short for "K-under" (originally german: Kurz-unten), because it is the lower part of the ori ...

to provide voice, data, and video communications in Russia.

Mission

It is part of the

Ekspress Ekspress (russian: Экспресс meaning Express), is a series of geostationary communications satellites owned by Russian Satellite Communications Company (RSCC). The first satellite of this kind was launched on 13 October 1994. The satellit ...

network of satellites. Following its launch and on-orbit testing, it was placed in

geostationary orbit A geostationary orbit, also referred to as a geosynchronous equatorial orbit''Geostationary orbit'' and ''Geosynchronous (equatorial) orbit'' are used somewhat interchangeably in sources. (GEO), is a circular geosynchronous orbit in altitud ...

at 40° West, from where it provides communications services to Russia. It is equipped with seventeen

. In January 2020, the satellite was retired and moved to a

graveyard orbit A graveyard orbit, also called a junk orbit or disposal orbit, is an orbit that lies away from common operational orbits. One significant graveyard orbit is a supersynchronous orbit well beyond geosynchronous orbit. Some satellites are moved int ...

above the

References

{{Orbital launches in 2002 Ekspress satellites Spacecraft launched in 2002 Satellites using the KAUR bus