Spacewalk Prepares ISS For Russian Module, Possible Cooling And Power Issues

By Mark Carreau
Source: AWIN First
July 09, 2013
Credit: NASA

Astronauts Chris Cassidy and Luca Parmitano extended power cabling across the outside of the International Space Station’s U.S. segment for a future Russian lab, pre-staged utility lines and hardware to deal with potential cooling and power system failures and retrieved external science experiments during a NASA-sponsored July 9 spacewalk.

Some of the tasks initiated will be completed during a follow-on 6-to-7-hr. spacewalk by the same NASA and European Space Agency astronauts scheduled for July 16. The first outing by Cassidy and Parmitano concluded at 2:09 p.m. EDT and spanned 6 hr., 7 min. 

“Great work guys,” said NASA’s Mission Control.

Cassidy and Parmitano strung power cabling to the intersection of the station’s U.S. and Russian segments, where spacewalking cosmonauts will complete the extensions of NASA Ethernet as well as power links to a berthing port designated for Russia’s Nauka Multipurpose Laboratory Module (MLM) during an upcoming excursion.

The MLM, along with a European robot arm, awaits a Proton launch and unpiloted rendezvous and berthing with the ISS late this year.

Cosmonauts Fyodor Yurchikhin and Alexander Misurkin installed external clamps for U.S. power and Ethernet cable extensions during a June 24 spacewalk.

Cassidy and Parmitano will string Ethernet cabling across the U.S. segment to the intersection with the Russian segment during the July 16 excursion.

Cassidy provided U.S. power and data links to a power and data grapple fixture (PDGF) on the Russian Zarya module. The PDGF would serve as an anchor for Canada’s robot arm, where it could be controlled from the U.S. segment of the ISS to assist with future spacewalk activities on Russian modules.

The July 9 outing marked the first spacewalk by an Italian astronaut. The excursion was Cassidy’s fifth.

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