Newman, making his fifth spacewalk, will work closely with crewmate, Mike Massimino, who will be conducting his first spacewalk. Newman will wear a spacesuit marked with horizontal broken red strips for identification and Massimino will have on a spacesuit with diagonally broken red stripes.
This spacewalk mirrors much of the work done by spacewalkers John Grunsfeld and Rick Linnehan who replaced the Hubble Space Telescope's starboard solar array in today's seven-hour spacewalk. The second team of spacewalkers will remove the port-side array, stow it in the payload bay, and install a new-generation array along with its electrical components, or Diode Box Assembly. An additional task for the pair is to replace a Reaction Wheel Assembly (RWA) inside the telescope. Space shuttle robot arm operator Nancy Currie will provide transportation for the spacewalkers to and from the worksite at the port array of the telescope and Bay 6, the location of the RWA.
The RWA to be replaced is one of four onboard the telescope. They are pointing devices that control Hubble's steady view of the cosmos. After the solar array installation, Massimino will ride the end of the robot arm to Bay 6, remove the old RWA, and then carry it to the payload bay where Newman will be waiting with the new component. They will exchange the units and Massimino will take the new RWA back to Bay 6 for installation, while Newman stows the old RWA for the flight home. Setup tasks for future spacewalks of this mission, including removing the thermal cover on Bay 5 and installing foot restraints, will wrap up the spacewalk.
Columbia Commander Scott Altman and Pilot Duane Carey will document their crewmates' work during the spacewalk with television and still-photo cameras, while also monitoring systems onboard Columbia. Today's spacewalk, the second of five for this mission, is scheduled to last almost seven hours.
The crew is to begin its sleep period at 11:52 a.m. CST.