SpaceX 'Go' for Dragon Cargo Ship Launch to Space Station Monday

March 13, 2016 – 05:24 am
The lettuce experiment on The Dragon launch has been delayed since March due to unrelated damage to a ground-based tracking radar used by the Cape Canaveral Air Force Station.

Spacewalk repair needed

The failed backup computer is known in NASA parlance as a Multiplexer-Demultiplexer, or MDM, and is one of more than a dozen such devices used to route commands to various systems on the space station. It failed late Friday (April 11) when flight controllers on Earth attempted to activate it.

Suffredini said astronauts will eventually have to perform a spacewalk to replace the broken MDM computer, possibly as soon as April 22. The International Space Station is home to two American astronauts, one Japanese astronaut and three Russian cosmonauts. NASA plans to decide who will perform the spacewalk later today, Suffredini said.

"This would be one of the simplest that we could do, " Suffredini said of the spacewalk. The actual spacewalk would last about 2.5 hours and require two astronauts to swap out one 50-lb. (22.6 kg) MDM computer one of several spares on the station.


Source: www.space.com

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