[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Spacewalkers to Replace Station Gyro Today


Mission Specialists Dave Williams and Rick Mastracchio will go 
spacewalking for the second time today. Their primary task is to replace 
a faulty attitude control gyro on the International Space Station. The 
spacewalk is slated to begin at 11:31 a.m. EDT
( 1531 UTC ) and last 6.5 hours.

The faulty gyro is one of four devices, called control moment gyros 
(CMGs), located in the Z1 truss that are used to control the stationís 
orientation. The new CMG rode to the station on External Stowage 
Platform-3 in Space Shuttle Endeavourís payload bay.

Mission Specialist Tracy Caldwell will resume her role as the missionís 
spacewalk coordinator and Pilot Charles Hobaugh will operate the 
stationís robot arm. Two more spacewalks are scheduled for STS-118ís 
stay at the station.

Meanwhile on Earth, experts continue to analyze imagery collected Sunday 
during the STS-118 crewís focused inspection of five areas of concern on 
the Endeavourís heat shield.

*Managers Add Three Days to Shuttle Mission*

Mission managers decided Sunday to extend the STS-118 mission by three 
days. The decision came after the successful operation of the new 
Station-to-Shuttle Power Transfer System (SSPTS).

Endeavour is now scheduled to undock from the International Space 
Station on Aug. 20 and land Aug. 22. In addition to the extra time at 
the orbital outpost, managers added a fourth spacewalk that is scheduled 
to take place Aug. 17.

The SSPTS reroutes power from the space station to the shuttle during 
docked operations, allowing the orbiter to conserve materials needed to 
generate power and spend more time in space.
Sent via sarex@amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/sarex