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Astronauts suit up for mission's third spacewalk BY WILLIAM HARWOOD STORY WRITTEN FOR CBS NEWS "SPACE PLACE" & USED WITH PERMISSION Posted: November 23, 2009 
Astronauts Robert Satcher and Randolph Bresnik prepared for a planned five-hour 45-minute spacewalk Monday to install an oxygen tank on the International Space Station's Quest airlock module, set up a materials science space exposure experiment and carry out a variety of station assembly get-ahead tasks. In two earlier spacewalks, the Atlantis astronauts accomplished several of the tasks planned for the final excursion and flight planners revised the content of the third EVA to include additional get-ahead objectives. This will be the 136th spacewalk devoted to station assembly and maintenance since construction began in 1998, the 17th this year and the third and final excursion planned by the Atlantis astronauts. It is the second spacewalk for Satcher and Bresnik. For identification, Satcher's suit is unmarked while Bresnik's features broken stripes around the legs. "The major task we're going to do is installing the oxygen gas tank so we're bringing up some atmosphere for the space station," Satcher said in a NASA interview. "It comes up actually on ELC-2 (Express Logistics Carrier 2), which is going to be stored all the way out on the end of the space station, on the starboard end. "So we got to go out, way out there, and get it, coordinate with the robotic arm. We have to take it off of ELC-2, hold it in position for the arm to grapple it and transport it all the way back over to the airlock where we will go and install it. Now, before we can install it there, there's some MMOD shields, which are micrometeorite debris shields, that we [have] got to move out of the way, so we'll be detaching those, moving them out of the way and then we can install the gas tank. "The other major activity is we'll be deploying these material science experiments called MISSEs. Randy will be getting those out of the cargo bay of the shuttle and bringing those over to ELC-2 where they're installed and deployed." The oxygen tank installation and MISSE-7 experiment set up are expected to take about three hours to complete. The rest of the excursion will be devoted to assembly get-ahead tasks. Satcher will loosen a bolt on an ammonia tank assembly that will be replaced later and stow a long "cheater bar" tool outside the station while Bresnik works to connect ammonia fluid line jumpers in the station's cooling system. Satcher then will install insulation to protect power connectors on the railcar that moves the station's robot arm along the main power truss. He also will install a protective cover on a camera at the end of the robot arm. While that work is going on, Bresnik will relocate a foot restraint. Here is an updated timeline of today's activity (in EST and mission elapsed time; includes revision K of the NASA television schedule): EST........DD...HH...MM...EVENT 11/23/09 02:28 AM...06...12...00...STS/ISS crew wakeup 03:03 AM...06...12...35...EVA-3: 14.7 psi repress/hygiene break 03:48 AM...06...13...20...EVA-3: Airlock depress to 10.2 psi 04:03 AM...06...13...35...ISS daily planning conference 04:13 AM...06...13...45...EVA-3: Campout EVA preps 05:43 AM...06...15...15...EVA-3: Spacesuit purge 05:58 AM...06...15...30...EVA-3: Spacesuit prebreathe 06:48 AM...06...16...20...EVA-3: Crew lock depressurization 07:18 AM...06...16...50...EVA-3: Spacesuits to battery power 07:23 AM...06...16...55...EVA-3: Airlock egress/setup 07:48 AM...06...17...20...EVA-3: O2 tank transfer and MISSE 7 install 10:48 AM...06...20...20...EVA-3: Airlock debris shields 11:18 AM...06...20...50...EVA-3/Satcher: Ammonia tank bolt torque 11:18 AM...06...20...50...EVA-3/Bresnik: P1/P3 jumper install 11:38 AM...06...21...10...EVA-3/Satcher: Cheater bar stow 11:48 AM...06...21...20...EVA-3/Bresnik: S1/S3 jumper install 11:53 AM...06...21...25...EVA-3/Satcher: MSS insulation 12:18 PM...06...21...50...EVA-3/Bresnik: Foot restraint 3 relocate 12:33 PM...06...22...05...EVA-3: Contingency time 01:18 PM...06...22...50...EVA-3: Cleanup and ingress 01:48 PM...06...23...20...EVA-3: Airlock repressurization 02:03 PM...06...23...35...Spacesuit servicing 03:13 PM...07...45...00...Evening planning conference 03:30 PM...07...01...02...Mission status briefing on NTV 05:28 PM...07...03...00...ISS crew sleep begins 05:58 PM...07...03...30...STS crew sleep begins 06:00 PM...07...03...32...Daily highlights on NTV 11:30 PM...07...09...02...Flight director update
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PRE-FLIGHT INTERVIEW WITH RANDY AND REBECCA 