The Endeavour astronauts are preparing the shuttle for landing Tuesday, packing up equipment and testing the ship's re-entry systems before enjoying a final few hours of off-duty time this afternoon.

Canadian astronaut Dave Williams, commander Scott Kelly and Barbara Morgan plan to participate in a Canadian Space Agency VIP/education event at 11:46 a.m., the final such event of the mission.

The astronauts were awakened for their final full day in space at 4:37 a.m. by a recording of "Flying" by the Long John Baldry Trio, a Canadian group, beamed up from mission control.

"Good morning, Endeavour, and a special good morning to Dave today, astronaut Shannon Lucid called from Houston.

"And Houston, Endeavour, good morning," Williams replied. "That's a great song to hear for a day before we come back to land."

Today's mission status briefing with entry flight director Steve Stich is planned for 2:30 p.m. and a final Mission Management Team update is scheduled for 4 p.m. Among the topics will be the results of Sunday's final heat shield inspection.

Here is an updated timeline of events (include revision Q of the NASA television schedule; in EDT and mission elapsed time):

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

Monday, 08/20/07

04:37 AM...11...10...00...Crew wakeup
07:42 AM...11...13...05...Cabin stow begins
07:52 AM...11...13...15...Flight control system checkout (began early)
09:12 AM...11...14...35...Maneuvering thruster hot fire test
09:27 AM...11...14...50...Deorbit review
11:47 AM...11...17...10...Canadian Space Agency VIP/educational event
12:57 PM...11...18...20...PILOT landing simulator practice
01:07 PM...11...18...30...Spacehab entry preps
01:52 PM...11...19...15...Crew meal
02:30 PM...11...19...54...Mission status briefing on NTV
03:12 PM...11...20...35...Crew off duty
04:00 PM...11...21...24...Post-MMT briefing on NASA TV
05:27 PM...11...22...50...Ergometer stow
05:53 PM...11...23...16...Orbit adjust rocket firing
05:57 PM...11...23...20...KU-band antenna stow
08:37 PM...12...02...00...Crew sleep begins

Tuesday, 08/21/07

04:37 AM...12...10...00...Crew wakeup
06:32 AM...12...11...55...Group B computer powerup
06:47 AM...12...12...10...Inertial measurement unit alignment
07:27 AM...12...12...50...Deorbit timeline begins
11:25 AM...12...16...48...Deorbit ignition (dT: 3:33; dV: 246 mph)
12:01 PM...12...17...24...Entry interface (alt: 400,000 feet)
12:05 PM...12...17...28...First left roll command
12:21 PM...12...17...44...Left-to-right roll reversal
12:26 PM...12...17...49...Mach 2.5
12:28 PM...12...17...51...Mach 1
12:30 PM...12...17...53...Shuttle banks to line up on runway 15
12:32 PM...12...17...55...Landing

The 5 a.m. forecast from the National Hurricane Center continues to show Hurricane Dean on a track that will take it into central Mexico late Wednesday. Assuming no major changes that would threaten mission control in Houston, NASA likely will attempt to bring Endeavour back to Florida on Tuesday and, if the weather at the Kennedy Space Center doesn't cooperate, extend the mission a day and try again on Wednesday.

The Sunday evening forecast from the Spaceflight Meteorology Group at the Johnson Space Center called for good weather at Kennedy on Tuesday, with scattered clouds at 3,000 and 10,000 feet and winds out of 110 degrees at 10 knots with gusts to 17. That translates into a maximum crosswind of about 11 knots, well below NASA's safety limit.

A detailed re-entry timeline for Tuesday, Wednesday and Thursday, along with an updated weather forecast, will be posted here after today's mission status briefing.

Additional coverage for subscribers:
VIDEO: THE FLIGHT DAY 10 HIGHLIGHTS MOVIE PLAY
VIDEO: EVENING UPDATE FROM MISSION MANAGEMENT TEAM PLAY
VIDEO: FLIGHT DAY 10 MISSION STATUS BRIEFING PLAY
VIDEO: CREW NEWS CONFERENCE U.S. PART | CANADIAN PART

VIDEO: THE FLIGHT DAY 9 HIGHLIGHTS MOVIE PLAY
VIDEO: FLIGHT DAY 9 MISSION STATUS BRIEFING PLAY
VIDEO: CREW RECEIVES NEWS THAT NO REPAIR NEEDED PLAY
VIDEO: EDUCATIONAL EVENT WITH CHALLENGER CENTER PLAY
VIDEO: BARBARA MORGAN CALLS HER FORMER SCHOOL PLAY
VIDEO: CREW INTERVIEW WITH THE ASSOCIATED PRESS PLAY
VIDEO: CREW INTERVIEW WITH REUTERS PLAY
VIDEO: CREW INTERVIEW WITH IDAHO PUBLIC TV PLAY

VIDEO: CREW MODULE CAMERA SHOWS FIRST MINUTES OF LAUNCH PLAY
VIDEO: CREW MODULE CAMERA SHOWS ARRIVAL IN SPACE PLAY
VIDEO: LEFT-HAND BOOSTER LOOKING UP PLAY
VIDEO: LEFT-HAND BOOSTER LOOKING DOWN PLAY
VIDEO: RIGHT-HAND BOOSTER LOOKING UP PLAY
VIDEO: RIGHT-HAND BOOSTER LOOKING DOWN PLAY
VIDEO: THE EXTERNAL FUEL TANK'S CAMERA PLAY

VIDEO: THE FLIGHT DAY 8 HIGHLIGHTS MOVIE PLAY
VIDEO: FLIGHT DAY 8 MISSION STATUS BRIEFING PLAY
VIDEO: THE THIRD SPACEWALK BEGINS PLAY
VIDEO: MOVING AN S-BAND COMMUNICATIONS ANTENNA PLAY
VIDEO: STATION RAIL CART RELOCATED PLAY
VIDEO: SPACESUIT GLOVE DAMAGE SPOTTED PLAY
VIDEO: PREVIEW OF SPACEWALK NO. 3 PLAY

VIDEO: THE FLIGHT DAY 7 HIGHLIGHTS MOVIE PLAY
VIDEO: FLIGHT DAY 7 MISSION STATUS BRIEFING PLAY
VIDEO: EDUCATIONAL EVENT WITH CHILDREN IN IDAHO PLAY
VIDEO: CREW INTERVIEW WITH ABC NEWS PLAY
VIDEO: CREW INTERVIEW WITH CBS NEWS PLAY
VIDEO: CREW INTERVIEW WITH CNN PLAY
VIDEO: CREW INTERVIEW WITH NBC NEWS PLAY
VIDEO: CREW INTERVIEW WITH FOX NEWS PLAY
VIDEO: STOWAGE PLATFORM ATTACHED TO THE STATION PLAY
VIDEO: THE PLATFORM IS RAISED OUT OF PAYLOAD BAY PLAY
VIDEO: SHUTTLE ARM GRAPPLES THE STOWAGE PLATFORM PLAY
VIDEO: STOWAGE PLATFORM INSTALLATION EXPLAINED PLAY

VIDEO: THE FLIGHT DAY 6 HIGHLIGHTS MOVIE PLAY
VIDEO: SHANNON GIVES UPDATE ON TILE DAMAGE ANALYSIS PLAY
VIDEO: FLIGHT DAY 6 MISSION STATUS BRIEFING PLAY
VIDEO: PREVIEW OF SPACEWALK NO. 2 PLAY
VIDEO: SPACEWALK NO. 2 BEGINS PLAY
VIDEO: SPACEWALKERS UNBOLT THE FAILED GYROSCOPE PLAY
VIDEO: THE FAILED GYRO IS REMOVED FROM THE STATION PLAY
VIDEO: NEW GYRO IS RETRIEVED FROM SHUTTLE PAYLOAD BAY PLAY
VIDEO: SPACEWALKERS BRING NEW GYRO UP TO THE STATION PLAY
VIDEO: THE NEW GYRO IS INSTALLED AND BOLTED DOWN PLAY
VIDEO: FAILED GYRO PUT ON STATION STOWAGE PLATFORM PLAY

VIDEO: THE FLIGHT DAY 5 HIGHLIGHTS MOVIE PLAY
VIDEO: HURRICANE FLOSSIE ON SUNDAY EVENING PLAY
VIDEO: CREW INSPECTIONS SHUTTLE TILE DAMAGE PLAY
VIDEO: INSPECTION BOOM FOR DAMAGE CHECK PLAY
VIDEO: FLIGHT DAY 5 MISSION STATUS BRIEFING PLAY

VIDEO: THE FLIGHT DAY 4 HIGHLIGHTS MOVIE PLAY
VIDEO: FLIGHT DAY 4 MISSION STATUS BRIEFING PLAY
VIDEO: SPACEWALK NO. 1 BEGINS PLAY
VIDEO: SPACEWALKERS REMOVE LAUNCH LOCKS ON S5 TRUSS PLAY
VIDEO: ROBOT ARM INSTALLS STARBOARD 5 TRUSS ON STATION PLAY
VIDEO: STARBOARD 5 TRUSS BOLTED TO THE SPACE STATION PLAY
VIDEO: TRUSS'S GRAPPLE FIXTURE REMOVED PLAY
VIDEO: PREVIEW OF SPACEWALK NO. 1 PLAY
VIDEO: STARBOARD 5 TRUSS INSTALLATION EXPLAINED PLAY

VIDEO: THE FLIGHT DAY 3 HIGHLIGHTS MOVIE PLAY
VIDEO: FLIGHT DAY 3 MISSION STATUS BRIEFING PLAY
VIDEO: STARBOARD 5 TRUSS PULLED OUT OF PAYLOAD BAY PLAY
VIDEO: TRUSS HANDED FROM SHUTTLE ARM TO STATION ARM PLAY
VIDEO: SHUTTLE ASTRONAUTS WELCOMED ABOARD STATION PLAY
VIDEO: SHUTTLE DOCKS TO THE STATION AS SEEN LIVE PLAY
VIDEO: ENDEAVOUR AND STATION FLY INTO ORBITAL SUNRISE PLAY
VIDEO: SHUTTLE DOES BACKFLIP BELOW THE STATION PLAY
VIDEO: ENDEAVOUR INTERCEPTS THE SPACE STATION PLAY
VIDEO: SHUTTLE TI BURN SEEN FROM STATION PLAY
VIDEO: ANIMATED PREVIEW OF DOCKING PLAY

VIDEO: FIRST IN-SPACE COMMENTS FROM BARBARA MORGAN PLAY
VIDEO: THE FLIGHT DAY 2 HIGHLIGHTS MOVIE PLAY
VIDEO: SHUTTLE INSPECTIONS EXPLAINED PLAY
VIDEO: FLIGHT DAY 2 MISSION STATUS BRIEFING PLAY
VIDEO: THE FULL LAUNCH EXPERIENCE PLAY
VIDEO: JETTISONED EXTERNAL TANK FALLS AWAY PLAY
VIDEO: THE FLIGHT DAY 1 HIGHLIGHTS MOVIE PLAY

VIDEO: LAUNCH REPLAY: EXTERNAL TANK CAMERA PLAY
VIDEO: LAUNCH REPLAY: UCS-23 WIDESCREEN PLAY
VIDEO: LAUNCH REPLAY: PLAYALINDA 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 060 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: WEST TOWER PLAY
VIDEO: LAUNCH REPLAY: PAD PERIMETER PLAY
VIDEO: LAUNCH REPLAY: COMPLEX 41 PLAY
VIDEO: LAUNCH REPLAY: KSC RUNWAY PLAY
VIDEO: LAUNCH REPLAY: PAD FRONT PLAY
VIDEO: LAUNCH REPLAY: CAMERA CS-1 PLAY
VIDEO: LAUNCH REPLAY: CAMERA CS-2 PLAY
VIDEO: LAUNCH REPLAY: CAMERA UCS-12 PLAY
VIDEO: LAUNCH REPLAY: PRESS SITE PLAY
VIDEO: LAUNCH REPLAY: VAB ROOF PLAY
VIDEO: LAUNCH REPLAY: BEACH TRACKER PLAY

VIDEO: ENDEAVOUR BLASTS OFF! PLAY
VIDEO: CREW'S LAUNCH MORNING PHOTO IN DINING ROOM PLAY
VIDEO: UPCLOSE FOOTAGE OF THE GANTRY ROLLBACK PLAY
VIDEO: TIME-LAPSE MOVIE OF GANTRY ROLLBACK PLAY
VIDEO: TUESDAY MORNING'S STATUS BRIEFING PLAY
VIDEO: STS-118 PRE-LAUNCH NEWS CONFERENCE PLAY
VIDEO: MONDAY MORNING'S STATUS BRIEFING PLAY
VIDEO: SUNDAY COUNTDOWN AND WEATHER UPDATE PLAY
VIDEO: CREW ARRIVES AT KENNEDY SPACE CENTER PLAY
VIDEO: COMMENTS FROM EACH OF THE ASTRONAUTS PLAY

VIDEO: PRE-FLIGHT INTERVIEW: SCOTT KELLY PLAY
VIDEO: PRE-FLIGHT INTERVIEW: CHARLIE HOBAUGH PLAY
VIDEO: PRE-FLIGHT INTERVIEW: TRACY CALDWELL PLAY
VIDEO: PRE-FLIGHT INTERVIEW: RICK MASTRACCHIO PLAY
VIDEO: PRE-FLIGHT INTERVIEW: DAVE WILLIAMS PLAY
VIDEO: PRE-FLIGHT INTERVIEW: BARBARA MORGAN PLAY
VIDEO: PRE-FLIGHT INTERVIEW: ALVIN DREW PLAY
MORE: STS-118 VIDEO COVERAGE
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