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Express AM4



Express AM4, a Russian communications satellite, was launched from Baikonur on 17 August 2011 at 21:25 UT by a Proton rocket. Express AM4 was designed to provide communications coverage over Russia and neighboring countries for the next 15 years. The platform carried 63 transponders in C-band, Ku-band, Ka-band and L-band.

Contact was lost with the satellite and with its attached Briz M upper stage about six hours after the pair were launched. Telemetry stopped either during or after the fourth of five planned Briz M upper stage burns planned to occur during a nine-hour maneuver designed to insert the satellite into a geosynchronous transfer orbit.

Alternate Names

  • 37798

Facts in Brief

Launch Date: 2011-08-17
Launch Vehicle: Dnepr
Launch Site: Yasni, Russia

Funding Agency

  • Russian Satellite Communications Company (Russia)


  • Communications

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office

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