[sarex] Space Station Grows With Addition of Truss Segment

Arthur Rowe azrowe80 at verizon.net
Sun Aug 12 08:02:19 PDT 2007


	*Command and Control Computer Shuts Down, Backup Takes Over; No Impact 
to STS-118 Spacewalk*

The main command and control computer in the International Space 
Station’s Destiny Laboratory shut down about 3:52 p.m. EDT Saturday. The 
primary backup computer immediately took control and assumed the backup 
duties. There was no impact to the spacewalk being conducted by the 
STS-118 crew. Flight controllers are working to resolve the issue.

*Space Station Grows With Addition of Truss Segment*

ISS's robotic arm, Orbital Boom Sensor System and Endeavour's robotic 
armImage above: The International Space Station's robotic arm prepares 
to hand off the Orbital Boom Sensor System (OBSS) to shuttle Endeavour's 
robotic arm. Image credit: NASA TV


Already the largest human-made object orbiting the Earth, the 
International Space Station continued its on-orbit growth spurt with the 
addition of the Starboard 5 (S5) truss segment. The S5 was attached 
Saturday during STS-118’s first spacewalk.

The S5 will serve as a spacer segment between the Starboard 4 and 6 (S6) 
segments. The S6 and its solar arrays will be attached during a future 
shuttle mission. The S5 is the newest piece of the station’s backbone, 
called the Integrated Truss Structure, which will eventually span the 
length of a football field and contain four sets of solar arrays.

At least two more spacewalks will take place during STS-118’s stay at 
the station. One of the tasks during the upcoming spacewalks is the 
replacement of a faulty attitude control gyro. The two crews are also 
transferring cargo between Space Shuttle Endeavour and the station.

Expedition 15 Commander Fyodor Yurchikhin and Flight Engineers Oleg 
Kotov and Clay Anderson welcomed the seven-member STS-118 crew aboard 
the station Friday at 4:04 p.m. EDT. The STS-118 crew arrived at the 
station a couple of hours earlier when Space Shuttle Endeavour docked at 
2:02 p.m.

A decision is expected Sunday about a possible three-day extension of 
Endeavour’s stay at the station. A fourth spacewalk could also be added.

+ Read more about Expedition 15 
+ View crew daily timelines 

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