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Discovery Docks With Space Station; Spacewalk Set For Friday![]() Expedition 16 Commander Peggy Whitson (left) welcomes STS-120 Commander Pam Melroy aboard the International Space Station. Image credit: NASA TV |
Mission Specialists Scott Parazynski and Doug Wheelock will perform the first spacewalk. To prepare for the spacewalk, the duo is conducting an overnight "campout" in the station's airlock where the pressure has been lowered to the pressure normally found on Earth 10,000 feet above sea level. The airlock "campout" at a lower pressure protects against decompression sickness as Parazynski and Wheelock go to the even lower pressure of spacesuits Friday.
Other post-docking activities on Thursday included a crew-member exchange. STS-120 Mission Specialist Dan Tani replaced Expedition 16 Flight Engineer Clay Anderson, who will return to Earth with STS-120. The crew transfer became official when Tani's custom-made seatliner was installed into the Russian Soyuz spacecraft docked to the station.
Based on imagery analysis, shuttle engineers Friday will recommend no focused inspection of the shuttle's heat shield to the Mission Management Team. Imagery taken during the shuttle's backflip approach to station is still under review. The focused inspection is routinely scheduled on the fifth day of the mission for any additional necessary inspection of the thermal protection system.
The STS-120 crew members are scheduled to begin flight day 4 when they wake up at 1:38 a.m. Friday.
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