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Russian communications satellite launched by Proton

Posted: December 26, 2013
Updated with spacecraft separation

A Proton rocket fired away from the snow-covered Baikonur Cosmodrome in Kazakhstan on Thursday, completing a series of maneuvers before deploying a Russian civil communications satellite in orbit nine hours later.

The Proton rocket launched at 1049:56 GMT (5:49:56 a.m. EST; 4:49:56 p.m. local time) from the Baikonur Cosmodrome in Kazakhstan. Credit: TsENKI TV/Spaceflight Now
Liftoff of the workhorse Russian rocket from the Central Asia launch base was at 1049:56 GMT (5:49:56 a.m. EST; 4:49:56 p.m. local time).

The 19-story rocket quickly disappeared into a soupy cloud deck hanging over the Baikonur Cosmodrome, where temperatures hovered near freezing and a coating of snow blanketed the arid terrain.

The three-stage Proton launcher hurled the Express AM5 communications satellite and a Breeze M upper stage on a ballistic trajectory just shy of the velocity required to attain a stable orbit around Earth. Ten minutes after liftoff, the Breeze M separated from the Proton's third stage, according to the Russian Federal Space Agency.

Moments later, the Breeze M began an initial engine firing to reach a low-altitude parking orbit.

The Breeze M's engine ignited four times to boost the Express AM5 satellite into the correct orbit. It released the payload at 2012 GMT (3:12 p.m. EST), according to the Russian Federal Space Agency.

The Express AM5 spacecraft is owned Russian Satellite Communications Co., the country's state civil satellite operator.

Photo of the Express AM5 satellite being attached to the Proton rocket's Breeze M upper stage. Credit: Roscosmos
With a launch mass of 3.4 metric tons, or about 7,500 pounds, Express AM5 was manufactured by an industrial consortium led by ISS Reshetnev, a Russian satellite contractor. Express AM5 was the first satellite built around the heavy-class Express 2000 platform, according to ISS Reshetnev's website.

Canada's MDA Corp. built the satellite's repeater and antennas. Russia's Radio Research and Development Institute, known by the acronym NIIR, designed and manufactured the craft's communications payload, according to Reshetnev.

The satellite is designed for a 15-year lifetime and will be positioned in geostationary orbit at 140 degrees east longitude, covering Russia's Far East, Southeast Asia and Australia. Such an orbit allows the spacecraft to remain in a fixed location in the sky for users on the ground.

Express AM5 carries 40 Ku-band, 30 C-band, 12 Ka-band and two L-band transponders, according to RSCC.

The satellite will provide digital television and radio broadcasting, telephone, video conferencing, data transmission and Internet services. Like other satellites owned by RSCC, Express AM5 will also be used for mobile communications among between the Russian president and other government leaders, the company says on its website.

Follow Stephen Clark on Twitter: @StephenClark1.