[sarex] Navigation Computers Troubleshooting Efforts Continue
azrowe80 at verizon.net
Fri Jun 15 16:15:46 PDT 2007
SUBMITTED BY ARTHUR N1ORC - AMSAT A/C#31468
*Navigation Computers Troubleshooting Efforts Continue*
This afternoon, the crew inside the International Space Station was able
to power-up two lanes of the Russian Central Computer and two lanes of
the Terminal Computer by using a jumper cable to bypass a faulty
secondary power switch. The current plan is to allow the computers to
operate overnight and analyze the data Saturday morning.
Earlier in the day, International Space Station Program Manager Mike
Suffredini told reporters Russian and U.S. flight controllers and
engineers are focusing on efforts for recovering the computers and
options to maintain attitude control until the problem is resolved.
“I think we’re in good shape,” Suffredini said. “We still have a lot of
options to go through to recover these machines. We’ve got a talented
group of people to look at attitude control.”
The navigation computers provide backup attitude control and orbital
altitude adjustments. For now, the station’s control moment gyroscopes
are handling attitude control, with the shuttle’s propulsion system
*Crews Work Together on Station, Shuttle*
The S3/S4 truss and solar array viewed from the shuttle
The Expedition 15 and STS-117 crews continue to conduct joint operations
aboard the International Space Station and Space Shuttle Atlantis.
Throughout the week, the two crews have been activating the Starboard 3
and 4 (S3/S4) truss segment that was attached to the station on Monday.
The STS-117 crew has conducted two spacewalks to prepare the new segment
for activation and to retract arrays on the Port 6 (P6) truss. The P6
will be relocated from atop the station to the end of the Port 5 truss
by a future shuttle crew.
The S3/S4, which is 45 feet long and weighs 35,678 pounds, contains a
new set of solar arrays that will increase the station’s
power-generation capabilities. The S3/S4 also contains a rotary joint
that will allow its arrays to track the sun.
In addition to a new truss segment, NASA Astronaut Clayton Anderson
joined the Expedition 15 crew on Sunday, replacing Flight Engineer Suni
Williams. Anderson arrived at the station as a member of Space Shuttle
Atlantis’ crew. Atlantis docked to the station on Sunday. Williams spent
six months as an Expedition crew member.
STS-117 arrived at the station June 10 and is scheduled to undock June 19.
+ Read more about Expedition 15
+ View crew daily timelines
More information about the SAREX