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ISS SCIENCE STATUS REPORT #SS07-25



SUBMITED BY ARTHUR N1ORC - AMSAT A/C #31468

May 11, 2007

Katherine Trinidad
Headquarters, Washington 
202-358-3749

John Ira Petty
Johnson Space Center, Houston
281-483-5111 

STATUS REPORT: SS07-25

INTERNATIONAL SPACE STATION STATUS REPORT: SS07-25

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 station's 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, visit: 

http://www.nasa.gov/station

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

	
-end-



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