NOTE: The countdown for launch of Discovery continues on schedule for liftoff on Tuesday, Feb. 11. The 65-minute window opens at about 3:54 a.m. The exact window will be announced a few hours before launch and adjusted at the T-9 minute hold based on the final computation of the location of the Hubble Space Telescope.
Early this morning, Pad 39A was cleared to load the onboard cryogenic tanks with liquid hydrogen and liquid oxygen reactants. Reactant loading is complete and off-load of several hundred pounds of the cryogenics not required for this mission is currently in work and will continue through most of today. The reactants provide electricity for the orbiter and crew while in space and drinking water as a by-product for the 10-day mission. At about 10 a.m. tomorrow, checks of the fuel cells will begin to evaluate the pH content of the water by-product. Also, engineers will evaluate higher than allowable oxygen readings in the orbiter's midbody following cryogenic loading today. Troubleshooting will be conducted today in an effort to determine if the problem is with the servicing equipment or on the orbiter itself.
Tonight, the orbiter's mid-body umbilical unit will be demated and retracted into the fixed service structure. Final vehicle and facility close-outs will also resume. Final mid-deck payload loading operations will begin this afternoon and continue through tomorrow. At 9:30 a.m. Monday, the rotating service structure will be retracted away from Discovery. Loading of the external tank with cryogenic propellants will begin at about 7 p.m. Monday.
Air Force weather forecasters are currently indicating a 30 percent probability of weather prohibiting launch on Tuesday. A disturbance developing over the South Central U.S. is expected to possibly increase cloudiness through Monday. At launch time, the only concerns are for low and mid level clouds.
During Tuesday morning's launch period, the temperature at the pad is expected to be about 53 degrees; relative humidity about 86 percent; clouds scattered at 2,500 feet and 14,000 feet and broken at 25,000 feet; pad winds from the northwest at 7-10 knots.
The 24-hour delay forecast indicates a 10 percent chance of violation.
T-TIME LENGTH OF HOLD HOLD BEGINS HOLD ENDS T-27 hours 4 hours 8:00 p.m. Sat. 12:01 a.m. Sun. T-19 hours 8 hours 8:00 a.m. Sun. 4:00 p.m. Sun. T-11 hours 13 hours, 34 minutes 12:01 a.m. Mon. 1:34 p.m. Mon. T-6 hours 1 hour 6:34 p.m. Mon. 7:34 p.m. Mon. T-3 hours 2 hours 10:34 p.m. Mon. 12:34 a.m. Tues. T-20 minutes 10 minutes 3:14 a.m. Tues. 3:24 a.m. Tues. T-9 minutes about 10 minutes 3:35 a.m. Tues. 3:45 a.m. Tues.
Commander (CDR): Ken Bowersox Pilot (PLT): Scott Horowitz Mission Specialist (MS1): Joe Tanner Mission Specialist (MS2): Steve Hawley Mission Specialist (MS3): Greg Harbaugh Mission Specialist (MS4): Mark Lee Mission Specialist (MS5): Steve Smith
Monday, Feb. 10 7:30 p.m. Wake up 8:00 p.m. Breakfast * 11:21 p.m. Lunch and crew photo 11:51 p.m. Weather briefing (CDR, PLT, MS2) 11:51 p.m. Don launch and entry suits (MS1, MS3, MS4, MS5) Tuesday, Feb. 11 12:01 a.m. Don launch and entry suits (CDR, PLT, MS2) * 12:20 a.m. Crew suiting photo * 12:31 a.m. Depart for launch pad 39A * 1:01 a.m. Arrive at white room and begin ingress * 2:26 a.m. Close crew hatch * 3:54 a.m. Launch
* Televised events (times may vary slightly)
All times Eastern
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