Spacewalkers Richard Linnehan and Garrett Reisman have completed preparations for moving a Japanese logistics module from the shuttle Endeavour's cargo bay to the international space station's Harmony connecting module. Japanese astronaut Takao Doi and shuttle commander Dominic Gorie, operating Endeavour's 50-foot-long robot arm, plan to pull the new module out of the cargo bay around 2 a.m.

"It's a very delicate maneuver," Doi said before launch. "It will be challenging, but we have been training hard for the past year and I'm very confident we will succeed."

The module will be temporarily mounted atop Harmony while the station crew awaits delivery of Japan's Kibo research lab in late May. The much larger experiment module will be mounted to Harmony's left port and the logistics module launched aboard Endeavour will be moved from Harmony's upper port to a hatch on the far end of the Japanese lab.

Reisman and Garrett prepared the logistics module for its trip to Harmony by removing thermal covers and unplugging power cables to internal heaters. The remainder of the spacewalk, the first of five planned for Endeavour's mission, will be devoted to initial assembly of the Canadian Space Agency's special purpose dextrous manipulator, or SPDM, robot.

Engineers have not yet been able to route power to the disassembled robot's components, but they are optimistic about resolving the glitch. A software patch has been written to eliminate a potential timing problem between a power distribution unit and a work station computer in the Destiny laboratory module.

Linnehan and Reisman plan to attach hand-like grippers to each of Dextre's two arms during today's spacewalk. The arms will be attached to the robot's torso during a second spacewalk overnight Saturday. Engineers hope to have the power problem fixed by then.

Additional coverage for subscribers:
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VIDEO: THURSDAY'S MISSION MANAGEMENT TEAM UPDATE PLAY

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VIDEO: NARRATED ANIMATION OF PREVIEWING THE DOCKING PLAY
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VIDEO: THE FLIGHT DAY 1 HIGHLIGHTS MOVIE PLAY
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VIDEO: THE FULL LAUNCH EXPERIENCE PLAY
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VIDEO: THE POST-LAUNCH NEWS CONFERENCE PLAY
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VIDEO: PILOT JOHNSON CLIMBS INTO HIS SEAT PLAY
VIDEO: ASTRONAUT REISMAN CLIMBS INTO HIS SEAT PLAY
VIDEO: COMMANDER GORIE CLIMBS INTO HIS SEAT PLAY
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