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Proton rocket fails to launch AMC-14 satellite

Monday, March 24, 2008

At 23:18:55 GMT this evening, a Russian Proton-M/Briz-M rocket launched from Area 200/39 at the Baikonur Cosmodrome in Kazakhstan, with the AMC-14 satellite for American communications organisation SES Americom. The rocket, operated by International Launch Services (ILS), lifted off on time, and headed towards a Geosynchronous orbit. Around fourty minutes after lift-off, ILS reported that an anomaly had occurred during the second burn of the upper stage. AMC-14, which would have been operated in conjunction with Echostar was to provide direct-to-home satellite television services. It was based on the Lockheed Martin A2100 satellite bus.

This is the 11th orbital launch of 2008, and the first to fail. It is also the 334th launch of the Proton rocket, the 41st Proton launch failure, the 2,800th Russian orbital launch, and the 45th launch to be conducted by ILS. It is also the third failure of a Proton during an ILS launch in as many years, following a malfunction during a launch last September, and another in February 2006.

The Proton itself performed nominally, and the Briz-M upper stage successfully completed the first of three burns. During the second burn, however, an undisclosed malfunction occurred, leaving the satellite stranded in a much lower orbit than planned. It is unclear whether the satllite is recoverable. There are currently three options, which are to declare the satellite a write-off and de-orbit it, attempt to raise it to geosynchronous orbit under its own power, or propel it towards the Moon, using lunar gravity to slingshot it back into the correct orbit. If either of the latter options are chosen, it will be at great cost to the satellite's on-orbit life expectancy.


Source: Wikinews

Proton rocket launches Thor 5 satellite

Proton rocket launches Thor 5 ...Proton rocket launches Thor 5 ...
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Friday, March 07, 2008

In the sixth orbital launch of 2008, an International Launch Services Proton-M/Briz-M rocket has launched from area 200/39 at the Baikonur Cosmodrome in Kazakhstan, with the Norwegian Thor 5 communication satellite aboard. Liftoff of the 53 metre long Russian rocket occurred at 11:33 GMT, and the launch ended with the satellite's injection into a geosynchronous orbit, some 9 hours and 23 minutes later.

At 13:20, the second burn of the Briz-M upper stage was confirmed to have been successful. At 15:50, the third burn, and separation of the upper stage's auxiliary propellant tank, were reported to have been completed successfully. The fourth burn occurred about five hours later, and spacecraft separation followed at 20:57 GMT.

Thor 5 will be positioned at 1°W longitude, and will provide direct-to-home broadcasting services to Europe. The satellite was constructed by Orbital Sciences Corporation, and is based on the Star-2 satellite bus. It will be operated by Telenor, and is equipped with 24 Ku-band transponders.

The launch was delayed from 2007 after the failure of another Proton rocket, and scrubbed yesterday due to a problem with the rocket's guidance system, detected shortly before fuelling.

Source: wikinews

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