STS-134 Shuttle Mission to the International Space Station Launches Monday 16th @ 13:56 BST

Today's plan:

06...20...00...07:36 .....Begin 2-hour 30-minute built-in hold (T-minus 3 hours)

06...20...00...07:36 .....Closeout crew to white room
06...20...00...07:36 .....External tank in stable replenish mode
06...17...00...07:39 .....Ascent flight control team on console
06...05...00...07:51 .....Astronaut support personnel comm checks
05...35...00...13:21 .....Pre-ingress switch reconfig
05...16...00...13:40 .....NASA TV launch coverage begins
04...25...00...09:31 .....Final crew weather briefing
04...15...00...09:41 .....Crew suit up begins

03...50...00...10:06 .....Resume countdown (T-minus 3 hours)

03...45...00...10:11 .....Crew departs O&C building
03...15...00...10:41 .....Crew ingress
02...25...00...11:31 .....Astronaut comm checks
02...00...00...11:56 .....Hatch closure
01...30...00...12:26 .....White room closeout

01...10...00...12:46 .....Begin 10-minute built-in hold (T-minus 20m)
01...00...00...12:56 .....NASA test director countdown briefing
01...00...00...12:56 .....Resume countdown (T-minus 20m)

00...59...00...07:57 .....Backup flight computer to OPS 1
00...55...00...13:01 .....KSC area clear to launch

00...49...00...13:07 .....Begin final built-in hold (T-minus 9m)
00...24...00...13:32 .....NTD launch status verification
00...09...00...13:47:28 ..Resume countdown (T-minus 9m)

00...07...30...13:48:58 ..Orbiter access arm retraction
00...05...00...13:56:28 ..Launch window opens (placeholder; not needed for STS-134)
00...05...00...13:51:28 ..Hydraulic power system (APU) start
00...04...55...13:51:33 ..Terminate LO2 replenish
00...04...00...13:52:28 ..Purge sequence 4 hydraulic test
00...04...00...13:52:28 ..IMUs to inertial
00...03...55...13:52:33 ..Aerosurface profile
00...03...30...13:52:58 ..Main engine steering test
00...02...55...13:53:33 ..LO2 tank pressurization
00...02...35...13:53:53 ..Fuel cells to internal reactants
00...02...30...13:53:58 ..Clear caution-and-warning memory
00...02...00...13:54:28 ..Crew closes visors
00...01...57...13:54:31 ..LH2 tank pressurization
00...00...50...13:55:38 ..SRB joint heater deactivation
00...00...31...13:55:57 ..Shuttle GPCs take control of countdown
00...00...21...13:56:07 ..SRB steering test
00...00...07...13:56:21 ..Main engine start (T-6.6 seconds)

00...00...00...13:56:28 ..SRB ignition (LAUNCH)

All looking good and the forecast remains at 70% favourable conditions for launch today.
 
From spaceflightnow:

1122 GMT (7:22 a.m. EDT)
At least one of the three Transoceanic Abort Landing sites in Europe must have acceptable weather for the shuttle in case Endeavour must make an emergency landing during launch today. The outlook calls for thunderstorms at Moron runway in Spain and high winds at the Istres landing site France. But Zaragoza in Spain looks good.
 
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