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Mission History
Topic Started: Sep 9 2004, 10:19 AM (312 Views)
Pablicosta
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Texas Statesman
[ *  *  *  *  *  *  *  *  *  *  * ]
The History Of Lone Star 2, And The Missions It has Flown.
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Trecdom
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Cabinet
Countdown: (10 minutes behind LS1)

T-3 hours and holding
This built-in hold typically lasts two hours.

* Perform inertial measurement unit preflight calibration
* Align Merritt Island Launch Area (MILA) tracking antennas
* Final Inspection Team proceeds to the launch pad to conduct a detailed analysis of the vehicle as the team walks up and down the entire launch tower
* Closeout Crew proceeds to the launch pad to configure the crew module for countdown and launch and assist the astronauts with entry into the orbiter

T-3 hours and counting

* Crew departs for the launch pad and, upon arriving at the pad, begins entry into the orbiter via the White Room
* Complete close-out preparations in the launch pad's White Room
* Check cockpit switch configurations
* Astronauts perform air-to-ground voice checks with Launch Control (Kennedy Space Center) and Mission Control (Johnson Space Center)
* Close the orbiter's crew hatch and check for leaks
* Complete White Room close-out
* Close-out crew retreats to fallback area

T-20 minutes and holding
This built-in hold typically lasts 10 minutes.

* Shuttle Test Director conducts final launch team briefings
* Complete inertial measurement unit preflight alignments


T-20 minutes and counting

* Transition the orbiter's onboard computers to launch configuration
* Start fuel cell thermal conditioning
* Close orbiter cabin vent valves
* Transition backup flight system to launch configuration

T-9 minutes and holding
This is the final built-in hold, and varies in length depending on the mission.

* The Launch Director, Mission Management Team and Shuttle Test Director poll their teams for a go/no go for launch


T-9 minutes and counting

* Start automatic ground launch sequencer
* Retract orbiter access arm (T-7 minutes, 30 seconds)
* Start auxiliary power units (T-5 minutes, 0 seconds)
* Arm solid rocket booster range safety safe and arm devices (T-5 minutes, 0 seconds)
* Start orbiter aerosurface profile test, followed by main engine gimbal profile test (T-3 minutes, 55 seconds)
* Retract gaseous oxygen vent arm, or "beanie cap"
(T-2 minutes, 55 seconds)
* Crew members close and lock their visors
(T-2 minutes, 0 seconds)
* Orbiter transfers from ground to internal power
(T-50 seconds)
* Ground launch sequencer is go for auto sequence start (T-31 seconds)
* Activate launch pad sound suppression system
(T-16 seconds)
* Activate main engine hydrogen burnoff system
(T-10 seconds)
* Main engine start (T-6.6 seconds)

T-0

• Solid rocket booster ignition and liftoff!
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Trecdom
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Cabinet
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