Discovery spacewalkers Danny Olivas and Christer Fuglesang have replaced a device that helps the International Space Station determine its position relative to Earth so gyroscopes can keep the outpost flying in the right orientation. 
The veteran astronauts, from the U.S. and Sweden, respectively, climbed into latticework at the mid-point of the station's structural backbone to access the Rate Gyro Assembly. They released four bolts and removed two electrical connectors to remove the box that failed several months ago, then installed the new one.
A little more than two hours into the mission's third and final spacewalk, the team is working about 40 minutes ahead of schedule.
Fuglesang is getting to work replacing a failed circuit breaker in a nearby location on the "Starboard Zero" truss segment.
Other upcoming work includes installing two Global Positioning System antennas and routing 60-foot long avionics cables that will be connected to the Tranquility node - the last large American addition to the station - next year.
No comments:
Post a Comment