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ISS Status Report #07-25


*International Space Station Status Report #07-25*
*11 p.m. CDT Friday, May 11, 2007*
*Expedition 15 Crew*

A new cargo freighter launched from the Baikonur Cosmodrome in 
Kazakhstan to the International Space Station at 10:25 p.m. CDT Friday 
with more than 2.5 tons of fuel, air, water and other supplies and 
equipment aboard.

The ISS Progress 25 unpiloted cargo carrier is scheduled to dock with 
the station Tuesday at 12:10 a.m., bringing more than 1,050 pounds of 
propellant, almost 100 pounds of air, more than 925 pounds of water and 
3,042 pounds of dry cargo -- a total of 5,125 pounds. NASA TV coverage 
of the docking will begin at 11:30 p.m. Monday

The spacecraft will use the automated Kurs system to dock at the aft 
port of the Zvezda Service Module. Should human intervention be 
necessary, Expedition 15 Commander Fyodor Yurchikhin will be at the 
manual TORU docking system controls.

On Tuesday, Yurchikhin and flight engineers Suni Williams and Oleg Kotov 
tested communications between the station and the docked ISS Progress 
24. On Wednesday, in recognition of the Russian holiday Victory Day, 
marking the end of World War II, the crew performed only necessary 
station activities.

On Thursday, Kotov worked with a breathing experiment, while Williams 
and Yurchikhin spent about three hours replacing a frayed steel rope on 
a gyroscope on the Treadmill Vibration Isolation System, or TVIS. The 
gyroscope is part of the system that keeps vibrations created by an 
exercising crew member from being transmitted to the rest of the 
station, where it could interfere with delicate experiments. Williams 
and Yurchikhin wrapped up the work on Friday.

Additionally on Thursday, flight controllers tested the failed Control 
Moment Gyroscope (CMG) 3. The test involved tilting the CMG in different 
directions at different speeds to determine what effect, if any, 
friction had on the movement. The 600-pound gyroscope itself, one of 
four that controls the stationís orientation in space, was not spun up. 
It will be replaced this summer during the STS-118 mission.

For more about the crew's activities and station sighting opportunities, 


The next station status report will be issued Tuesday, May 15, after the 
Progress 25 docking, or earlier if events warrant.


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