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U.S. astronauts finish maintenance of space station
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15:16, September 06, 2009

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Two U.S. astronauts conducted a third and final space walk for shuttle Discovery's STS-128 mission on Saturday and finished outfitting and maintenance of International Space Station modules, NASA said.

According to NASA, Discovery's mission specialists Danny Olivasand Christer Fuglesang began the space walk at 4:39 p.m. EDT (2039 GMT), which lasted over seven hours.

The duo deployed a payload attachment system on the starboard truss and replaced a failed rate gyro assembly, which measures rates for any changes in the station's attitude, with a new one.

With that complete, they split up for the next tasks. Olivas installed a Global Positioning System antenna while Fuglesang replaced a remote power control module and installed an insulation sleeve on a cable inside the truss. Fuglesang followed that up with the installation of a second GPS antenna.

The two then reunited for the final task, routing 60-foot-long avionics systems cables along the station. The cables are being installed in preparation for the arrival of the Node 3 "Tranquility" in 2010.

Discovery lifts off midnight on August 28 from the Kennedy Space Center in Florida after two delays. Its 13-day flight is scheduled to end with a landing back in Florida on Thursday.

Source: Xinhua

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