Tag: MDM
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Astronauts replace failed computer in short spacewalk
STORY WRITTEN FOR CBS NEWS & USED WITH PERMISSION Astronaut Jack Fischer waves to a camera during Tuesday’s spacewalk. Credit: NASA TV/Spaceflight Now After a bit of a struggle with a balky bolt, space station commander Peggy Whitson replaced a failed external computer during a short, hurriedly planned spacewalk Tuesday while crewmate Jack Fischer installed a pair…
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Spacewalkers successfully complete EVA to replace failed EXT-1 MDM
Two spacewalkers – NASA astronauts Peggy Whitson and Jack Fischer – performed a short EVA on Tuesday to replace a recently failed piece of critical command and control hardware on the International Space Station (ISS). The short-notice unplanned spacewalk got underway at 11:20 AM UTC and finished two hours and 46 minutes later. EXT-1 MDM…
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Hurriedly planned ‘contingency’ spacewalk on tap Tuesday
STORY WRITTEN FOR CBS NEWS & USED WITH PERMISSION Space station commander Peggy Whitson and astronaut Jack Fischer are set for a two-and-a-half hour spacewalk Tuesday, a quickly-planned excursion to replace a recently installed external computer that failed Saturday. The 50-pound data relay box, known as a multiplexer-demultiplexer, or MDM, is one of two “tier 2” command…
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Astronauts completed speedy EVA to replace failed EXT-2 MDM
Two astronauts aboard the International Space Station (ISS) have completed an Extra Vehicular Activity (EVA) during Wednesday to Remove and Replace (R&R) a failed external computer module. The EVA known as US EVA-26 in the ISS numbering system, began at 1:56 PM GMT and was completed without issue in double time, ending just one hour…
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SpaceX, NASA realign launch and EVA scenarios
SpaceX managers have confirmed a second attempt to launch their Falcon 9 v1.1 with the CRS-3 Dragon spacecraft to the International Space Station (ISS) will take place on Friday, with Saturday as a back-up opportunity. Meanwhile, Station managers have created an EVA schedule to work around when Dragon finally sets sail. Currently, EVA-26 – which…
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Spacewalk set to fix external MDM failure on ISS
The International Space Station (ISS) suffered a failure of an external computer known as a Multiplexer/Demultiplexer (MDM) on Friday night (11 April), which will require a spacewalk on April 22 to replace in order to restore vital redundancy to the station. Despite the challenges, SpaceX’s Dragon CRS-3 mission – which could have been impacted by…