Tuesday, August 25, 2009

Discovery's Launch Delayed Due to Weather!

Launch of space shuttle Discovery was postponed early this morning due to lingering thunderstorms in the vicinity of the launch pad. Launch has been rescheduled for Wednesday, Aug. 26 at 1:10 a.m. EDT.

The mission management team will meet at 3 p.m. today to give the “go- no go” for tanking operations. The current STS-128 launch day weather forecast is 70 percent favorable conditions for tanking and launch. The primary concern is cumulus clouds and showers within 20 nautical miles of the shuttle landing facility at the time of launch.

Launch commentary on NASA TV will begin tonight at 8 p.m.

Launch and Landing

Mission: STS-128
Orbiter: Discovery
Primary Payload: Leonardo Multi-Purpose Logistics Module, science experiment racks, COLBERT treadmill
Launch Date: Aug. 26
Launch Time: 1:10 a.m. EDT
Launch Pad: 39A
Landing Site: Kennedy Space Center, Florida
Mission Duration: 13 days
Inclination/Altitude: 51.6 degrees/122 nautical miles

STS-128 Launch Timeline :

6:30 am Ascent switch list verification
6:30 am Crew sleep
8:45 am Countdown resumes at the T-11 hour mark
10:45 am Clear Launch Pad
11:35 pm Fuel cell activation
1:00 pm Clear “Launch Danger Area”
1:45 pm Countdown enters 2-hr hold at the T-6 hour mark
2:30 pm Crew wake up
3:00 pm Mission Management Team meets to give go for tanking
3:00 pm Crew breakfast
3:30 pm Crew final medical checks
3:30 pm NASA TV: External Tank fueling coverage
3:45 pm Countdown resumes at T-6 hr mark w/External Tank loading
4:29 pm Liquid Hydrogen Low Level Cutoff (LLCO) sensors go “wet”
4:44 pm Liquid Hydrogen “fast fill” begins
5:59 pm LH2 “topping” begins (gaseous Hydrogen vent valve cycling)
6:45 pm Countdown enters 2∏ -hr hold (T-3 hr mark)
• ET in stable replenish
• Closeout Crew to White Room
• Final Inspection Team (FIT) “walkdown”
7:00 pm Ascent Team on console in Mission Control

8:40 pm Crew receives weather brief from Ascent Team
8:50 pm Crew suits up for launch
9:15 pm Countdown resumes at the T-3 hour mark
9:30 pm Mission Management Team on console
9:20 pm Crew departs Ops & Checkout Building for launch pad 39A
9:50 pm Crew begins to board Discovery
10:15 pm T-38 weather reconnaissance (FCOD Dir. Brent Jett)
10:45 pm Crew communications checks
11:10 pm Discovery’s hatch is closed and latched for launch
11:30 pm Shuttle Training Aircraft weather recon (Jett)
11:35 pm White Room Closeout
11:55 pm Countdown enters a 10-min hold at the T-20 min mark
• Firing Room computer programs verified
• Landing convoy status check
• Abort landing sites checked
• Inertial Measurement Unit preflight alignment verified
• Preps for computer s/w transition to terminal count
12:05 am Countdown resumes at the T-20 minute mark
12:16 am Countdown enters ~45-min. hold at the T-9 min mark
MMT conducts final “Go-No Go” poll for launch
1:01:22 am Countdown resumes at the T-9 minute mark
1:02:52 pm Orbiter Access Arm (OAA) retract
1:04:22 pm Verify Auxiliary Power Units (APU) ready to start
1:04:22 pm Launch window opens
1:05:22 am Auxiliary Power Unit start
1:05:27 am Liquid Oxygen replenish terminate
1:06:22 am Purge Sequence 4 hydraulic test
1:06:22 am Inertial Measurement Units to inertial
1:06:27 am Flight Control Surface profile test
1:06:52 am Main Engine profile test
1:07:27 am LO2 tank pressurization
1:07:32 am Gaseous Oxygen Vent Hood retraction
1:07:47 am Fuel Cells to internal reactants
1:07:52 am Clear caution and warning memory
1:08:22 am Crew closes visors & initiates O2 flow
1:08:25 am Liquid Hydrogen tank pressurization
1:08:42 am Solid Rocket Booster joint heater deactivation
1:09:32 am Discovery to internal power
1:09:51 am Onboard computers take control of countdown (T-31 sec)
1:10:01 am Solid Rocket Booster steering test
1:10:15 am Main Engine start (T-6.6 seconds)
1:10:22 am LAUNCH (ISS 225 miles up, East of Newfoundland)
1:15:22 am Launch window closes
1:18:46 am Main Engine Cutoff (MECO)


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