2007 Report #25, 11 p.m. CDT, May 11, 2007
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.
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.