Mon, Sep 08, 2003
Making Progress
With a newly arrived Russian Progress cargo vehicle at the aft
end of the Zvezda Service Module awaiting unloading and a
just-vacated Pirs Docking Compartment awaiting their successors,
International Space Station Expedition 7 crewmembers, Commander
Yuri Malenchenko and NASA ISS Science Officer Ed Lu, spent much of
Friday doing scheduled spacesuit maintenance.
The ISS Progress 12 unpiloted cargo vehicle arrived Saturday
with about 5,000 pounds of food, water, equipment and fuel for the
ISS. Its docking port had been vacated a week earlier by ISS
Progress 10. It re-entered the Earth's atmosphere and burned
shortly after its Aug. 27 undocking.
The ISS Progress 11 spacecraft left its Pirs berth Thursday at
2:42 p.m. CDT for another month alone in orbit, as part of a
Russian scientific experiment. It will then be deorbited with its
load of station refuse and burn in the Earth's atmosphere. The
docking port it occupied will in October welcome the Soyuz TMA-3
spacecraft with Expedition 8 Commander Mike Foale and Cosmonaut
Alexander Kaleri aboard. With them will be Spaniard Pedro Duque a
European Space Agency astronaut who will spend eight days aboard
the orbiting laboratory. He will return to Earth with the
Expedition 7 crew.
The spacesuit work by Lu and Malenchenko involved what amounted
to annual maintenance. The work is called a mid-term checkout and
included emptying and refilling the suit's water tank and loops,
cycling relief valves, checking sensors and collecting data, a leak
check and running the suit's fan for two hours to lubricate it.
Such maintenance is required no more than 369 days after the last
spacewalk, previous maintenance or a checkout on the ground.
Other activities during the week included successful completion
by Lu of two more runs of the Pore Formation and Mobility
Investigation experiment in the Microgravity Science Glovebox of
the US laboratory Destiny. The experiment involves melting a
transparent material to see how bubbles form in the molten material
and how they interact with one another. Researchers hope to gain
understanding of molten materials and the potentially weakening
bubbles that can form in them.
Malenchenko and Lu also continued regular station maintenance
activities and their daily exercise sessions scheduled to mitigate
some of the physiological effects of their extended stay in
micorgravity.
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