The Endeavour astronauts are gearing up for a busy day of work to move the Canadian Space Agency's Dextre robot to its new home on the space station's Destiny lab module. The robot's construction pallet, meanwhile, will be moved back to the shuttle's payload bay for return to Earth.

The astronauts will enjoy a few hours of off-duty time early Wednesday and another break Wednesday afternoon before beginning preparations for a fourth spacewalk Thursday.

"Today is a very significant robotics day," said Ginger Kerrick, the overnight space station flight director. "Our configuration right now, the SSRMS, or the station arm, is holding the SPDM (Dextre robot) out in an overnight park position. Big picture, we have the arm based on node 2, so we've got one end at node 2, one end grappled to the SPDM. They will maneuver the arm over to the lab, drop off the SPDM and it will grapple there and that will be its new home."

Dextre's components were carried into orbit mounted on a Spacelab pallet. The SLP was moved to an attachment point on the front of the station's solar power truss for the robot's assembly. After mounting Dextre on the Destiny module, the station arm, operated by shuttle pilot Gregory Johnson, Garrett Reisman and European Space Agency astronaut Leopold Eyharts, will lock onto the SLP and move it back to the shuttle's cargo bay for return to Earth. The astronauts will be assisted by camera views from the shuttle's robot arm.

After the Spacelab pallet is locked in the shuttle's payload bay, the station arm will let go, move back to the front of the solar power truss and lock onto its mobile transporter. The arm's other end, locked onto a power and data grapple fixture on node 2, or the Harmony module, will let go and the arm will fold up so the mobile base system can move it to a different worksite.

During a spacewalk overnight Monday by Richard Linnehan and Robert Behnken, two space exposure experiment packages could not be attached to a mounting plate on the Columbus module because of interference issues with the pins needed to lock the first package in place. Mission managers today decided a second attempt will be made during the crew's fifth spacewalk Saturday.

To make time for the unscheduled work, the astronauts will forego mounting a bearing assembly on the station's right side solar alpha rotary joint, or SARJ. The starboard SARJ has been experiencing problems and is not being used to turn outboard arrays to track the sun. One of the bearings in the right-side SARJ was removed during an earlier mission and returned to Earth for analysis. But installation of a replacement, originally planned for the fifth spacewalk, is not a pressing issue and can be done later with no major impact to station operations.

"We took a look at that list of priorities and we determined there were a couple of tasks we could defer, one of which being the trundle bearing assembly installation," Kerrick said. "It's not required for the mission, it's not required for the time frame between this mission and the next and it provided an opportunity to re-arrange some activities on that day to allow a couple of hours for the installation of MISSE (the experiment packages)."

Here is an updated timeline of today's activity (in EDT and mission elapsed time; includes revision G of the NASA television schedule):

EDT........DD...HH...MM...EVENT

02:28 PM...07...12...00...Crew wakeup
04:28 PM...07...14...00...ISS daily planning conference
04:43 PM...07...14...15...Dextre arm 1 stow
05:13 PM...07...14...45...Cabin water line inspec tion
05:43 PM...07...15...15...Dextre arm 2 stow
06:13 PM...07...15...45...Module outfitting
06:43 PM...07...16...15...Dextre roll
06:43 PM...07...16...15...Retrieve jive boom
06:53 PM...07...16...25...Dextre stow on lab module
07:53 PM...07...17...25...Crew meals begin
08:30 PM...07...18...02...Mission status briefing on NASA TV
08:53 PM...07...18...25...Station arm (SSRMS) releases Dextre
09:08 PM...07...18...40...SSRMS grapple Spacelab pallet (SLP)
09:18 PM...07...18...50...Spacesuit swap and reconfig
09:53 PM...07...19...25...SLP release from station attachment fitting
10:08 PM...07...19...40...SLP berthing in shuttle payload bay
11:38 PM...07...21...10...SLP ungrapple
11:53 PM...07...21...25...SSRMS walkoff node 2 to mobile base system

03/19/08
12:28 AM...07...22...00...Crew off duty
01:28 AM...07...23...00...SSRMS releases node 2
01:48 AM...07...23...20...SSRMS translation to T-RAD support 2position
04:58 AM...08...02...30...ISS crew sleep begins
05:28 AM...08...03...00...STS crew sleep begins
06:00 AM...08...03...32...Daily video highlights reel on NASA TV
11:30 AM...08...09...02...Flight director update on NASA TV
01:28 PM...08...11...00...Crew wakeup

Additional coverage for subscribers:
VIDEO: THE FLIGHT DAY 8 HIGHLIGHTS MOVIE PLAY
VIDEO: TUESDAY'S MISSION STATUS BRIEFING PLAY
VIDEO: DEXTE ROBOT FREED FROM LAUNCH PALLET PLAY
VIDEO: SECOND SPARE DCSU BOX PLACED ON THE STATION PLAY
VIDEO: SPACEWALKER UNABLE TO INSTALL MISSE EXPERIMENT PLAY
VIDEO: FIRST SPARE DCSU BOX PLACED ON THE STATION PLAY
VIDEO: SPARE YAW JOINT FOR STATION ARM TRANSFERRED PLAY
VIDEO: MOUNTING PLATE ATTACHED TO COLUMBUS PLAY
VIDEO: DEXTRE ROBOT FITTED WITH TOOL HOLDER PLAY
VIDEO: TOOL PLATFORM ATTACHED TO DEXTRE PLAY
VIDEO: NARRATED PREVIEW OF SPACEWALK NO. 3 PLAY

VIDEO: LEFT-HAND BOOSTER CAMERA LOOKING UPWARD PLAY
VIDEO: LEFT-HAND BOOSTER CAMERA LOOKING INBOARD PLAY
VIDEO: LEFT-HAND BOOSTER CAMERA LOOKING DOWNWARD PLAY
VIDEO: RIGHT-HAND BOOSTER CAMERA LOOKING UPWARD PLAY

VIDEO: THE FLIGHT DAY 7 HIGHLIGHTS MOVIE PLAY
VIDEO: DEXTRE MOVES ARMS FOR BRAKE TESTS PLAY
VIDEO: CREW MEDIA INTERVIEWS SUNDAY NIGHT PLAY
VIDEO: SUNDAY NIGHT'S MISSION STATUS BRIEFING PLAY

VIDEO: THE FLIGHT DAY 6 HIGHLIGHTS MOVIE PLAY
VIDEO: SUNDAY'S MISSION STATUS BRIEFING PLAY
VIDEO: SECOND ARM ATTACHED TO DEXTRE ROBOT PLAY
VIDEO: FIRST ARM ATTACHED TO THE DEXTRE ROBOT PLAY
VIDEO: SPACEWALKERS HELP DEXTRE DO A SIT-UP PLAY
VIDEO: SECOND DEXTRE ARM PULLED FROM LAUNCH CARRIER PLAY
VIDEO: FIRST ARM REMOVED FROM PALLET WITH FORCE PLAY
VIDEO: NARRATED PREVIEW OF SPACEWALK NO. 2 PLAY

VIDEO: THE FLIGHT DAY 5 HIGHLIGHTS MOVIE PLAY
VIDEO: SATURDAY MORNING MEDIA INTERVIEWS PLAY
VIDEO: STATION ARM GRAPPLES DEXTRE TO PROVIDE POWER PLAY
VIDEO: CEREMONY AT JAPANESE MODULE HATCH OPENING PLAY
VIDEO: SATURDAY'S MISSION STATUS BRIEFING PLAY
VIDEO: FRIDAY'S MISSION MANAGEMENT TEAM UPDATE PLAY

VIDEO: THURSDAY'S MISSION STATUS BRIEFING PLAY
VIDEO: THE FLIGHT DAY 4 HIGHLIGHTS MOVIE PLAY
VIDEO: NEW MODULE CONNECTED TO THE STATION PLAY
VIDEO: JAPANESE MODULE UNBERTHED FROM SHUTTLE PLAY
VIDEO: NARRATED PREVIEW OF SPACEWALK NO. 1 PLAY
VIDEO: THURSDAY'S MISSION MANAGEMENT TEAM UPDATE PLAY

VIDEO: THE FLIGHT DAY 3 HIGHLIGHTS MOVIE PLAY
VIDEO: DEXTRE PALLET MOVED FROM SHUTTLE TO STATION PLAY
VIDEO: THURSDAY'S MISSION STATUS BRIEFING PLAY
VIDEO: SHUTTLE CREW WELCOMED ABOARD STATION PLAY
VIDEO: DOCKING REPLAY FROM OTHER TRUSS CAMERA PLAY
VIDEO: SHUTTLE ENDEAVOUR DOCKS TO SPACE STATION PLAY
VIDEO: ENDEAVOUR PERFORMS THE 360-DEGREE BACKFLIP PLAY
VIDEO: VIEWS OF THE SHUTTLE APPROACHING FROM BELOW PLAY
VIDEO: NARRATED ANIMATION OF PREVIEWING THE DOCKING PLAY
VIDEO: UPDATE FROM MISSION MANAGEMENT TEAM PLAY

VIDEO: THE FLIGHT DAY 2 HIGHLIGHTS MOVIE PLAY
VIDEO: WEDNESDAY'S MISSION STATUS BRIEFING PLAY
VIDEO: ANIMATION OF THE HEAT SHIELD INSPECTIONS PLAY
VIDEO: NARRATED TOUR OF ENDEAVOUR'S PAYLOAD BAY PLAY

VIDEO: THE FLIGHT DAY 1 HIGHLIGHTS MOVIE PLAY
VIDEO: INSIDE MISSION CONTROL DURING LAUNCH PLAY
VIDEO: THE FULL LAUNCH EXPERIENCE PLAY
VIDEO: SHUTTLE ENDEAVOUR BLASTS OFF! PLAY
VIDEO: THE POST-LAUNCH NEWS CONFERENCE PLAY
VIDEO: HIGHLIGHTS FROM ENDEAVOUR'S LAUNCH CAMPAIGN PLAY
VIDEO: HIGHLIGHTS OF THE PAYLOADS' LAUNCH CAMPAIGN PLAY

VIDEO: LAUNCH REPLAY: VAB ROOF PLAY
VIDEO: LAUNCH REPLAY: PAD FRONT PLAY
VIDEO: LAUNCH REPLAY: PRESS SITE PLAY
VIDEO: LAUNCH REPLAY: WEST TOWER PLAY
VIDEO: LAUNCH REPLAY: PAD PERIMETER PLAY
VIDEO: LAUNCH REPLAY: UCS-23 WIDESCREEN PLAY
VIDEO: LAUNCH REPLAY: CAMERA 009 PLAY
VIDEO: LAUNCH REPLAY: CAMERA 049 PLAY
VIDEO: LAUNCH REPLAY: CAMERA 050 PLAY
VIDEO: LAUNCH REPLAY: CAMERA 051 PLAY
VIDEO: LAUNCH REPLAY: CAMERA 054 PLAY
VIDEO: LAUNCH REPLAY: CAMERA 061 PLAY
VIDEO: LAUNCH REPLAY: CAMERA 063 PLAY
VIDEO: LAUNCH REPLAY: CAMERA 070 PLAY
VIDEO: LAUNCH REPLAY: CAMERA 071 PLAY
VIDEO: LAUNCH REPLAY: CAMERA CS-1 PLAY
VIDEO: LAUNCH REPLAY: CAMERA CS-2 PLAY
VIDEO: LAUNCH REPLAY: CAMERA CS-6 PLAY

VIDEO: FINAL PRE-LAUNCH POLLS GIVE "GO" FOR LIFTOFF PLAY
VIDEO: ENDEAVOUR'S CREW MODULE CLOSED FOR FLIGHT PLAY
VIDEO: ASTRONAUT DOI CLIMBS INTO HIS SEAT PLAY
VIDEO: PILOT JOHNSON CLIMBS INTO HIS SEAT PLAY
VIDEO: ASTRONAUT REISMAN CLIMBS INTO HIS SEAT PLAY
VIDEO: COMMANDER GORIE CLIMBS INTO HIS SEAT PLAY
VIDEO: ASTRONAUTS ARRIVE AT LAUNCH PAD 39A PLAY
VIDEO: CREW DEPARTS QUARTERS FOR LAUNCH PAD PLAY
VIDEO: ASTRONAUTS DON SPACESUITS FOR LAUNCH PLAY
VIDEO: TIME-LAPSE MOVIE OF SUNSET OVER PAD 39A PLAY
VIDEO: MORNING PREPARATIONS AT LAUNCH PAD 39A PLAY
VIDEO: PAD GANTRY RETRACTED FOR LAUNCH PLAY

VIDEO: OVERVIEW BRIEFING ON CANADA'S DEXTRE ROBOT PLAY
VIDEO: OVERVIEW BRIEFING ON JAPAN'S KIBO FACILITIES PLAY
VIDEO: SUNDAY'S COUNTDOWN STATUS BRIEFING PLAY
VIDEO: SATURDAY'S COUNTDOWN STATUS BRIEFING PLAY
VIDEO: CREW ARRIVES AT KENNEDY SPACE CENTER FOR LAUNCH PLAY
VIDEO: FRIDAY'S COUNTDOWN STATUS AND WEATHER BRIEFING PLAY

VIDEO: STS-123 ASTRONAUT BIOGRAPHY MOVIE PLAY
VIDEO: NARRATED SHORT FILM PREVIEW ENDEAVOUR'S FLIGHT PLAY

VIDEO: STS-123 MISSION OVERVIEW BRIEFING PLAY
VIDEO: BRIEFING ON THE SPACEWALKS PLAY
VIDEO: CREW'S PRE-FLIGHT BRIEFING PLAY
VIDEO: SHUTTLE AND ISS PROGRAM UPDATE PLAY

VIDEO: CREW INTERVIEW: COMMANDER DOM GORIE PLAY
VIDEO: CREW INTERVIEW: PILOT GREG JOHNSON PLAY
VIDEO: CREW INTERVIEW: MS1 BOB BEHNKEN PLAY
VIDEO: CREW INTERVIEW: MS2 MIKE FOREMAN PLAY
VIDEO: CREW INTERVIEW: MS3 TAKAO DOI PLAY
VIDEO: CREW INTERVIEW: MS4 RICK LINNEHAN PLAY

VIDEO: FLIGHT READINESS REVIEW NEWS BRIEFING PLAY
VIDEO: TCDT TRAINING HIGHLIGHTS PLAY
VIDEO: PRESS CHAT WITH CREW AT LAUNCH PAD PLAY
VIDEO: CREW ARRIVES AT KSC FOR PRACTICE COUNT PLAY
VIDEO: ENDEAVOUR ARRIVES AT PAD 39A PLAY | XL SIZE
VIDEO: SHUTTLE ROLLS TO THE VAB PLAY | XL SIZE
MORE: STS-123 VIDEO COVERAGE
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