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Station Crew Works on Electrical System

Published by Klaus Schmidt on Tue Oct 18, 2011 7:21 am via: NASA
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Commander Mike Fossum completed the first of two days’ work this week replacing failed Remote Power Controller Modules in the U.S. Destiny laboratory Monday. The unit provides redundant power to EXPRESS Rack 2 which powers the station’s KU-Band Receiver. He is scheduled to replace a second unit Tuesday.

Fossum and crewmate Satoshi Furukawa, a flight engineer, participated in an experiment that tests whether drugs known as biophosphonates could serve as an additional countermeasure to fend off bone density loss in long-term space travelers.

In another investigation into the effects of spaceflight on the human body, Furukawa participated in a session with the Integrated Cardiovascular (ICV) experiment. The procedure required Furukawa to relax and breathe normally for 10 minutes under quiet, restful conditions while his heart rate was monitored. ICV researches the extent and causes of weakening of the heart during long-duration missions.

Flight Engineer Sergei Volkov worked with the Russian Molniya-Gamma experiment, which measures gamma splashes and optical radiation during terrestrial lightning and thunder conditions. He also worked with the Russian experiment known as Relaxation, observing radiation patterns from Earth’s ionosphere.

Volkov loaded trash and other unneeded items into the docked ISS Progress 42 cargo vehicle, which is slated to leave the orbital outpost on Oct. 29. Its departure will clear the way for the arrival of the next cargo craft, ISS Progress 45, on Nov. 2.

Furukawa collected samples from the station’s Water Recovery System and analyzed them using the Total Organic Carbon Analyzer, or TOCA, which is necessary for checking drinking water quality. Total Organic Carbon is naturally present in the environment and by itself has no health effects, but it provides a medium for the formation of byproducts that may be harmful.

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