投稿日 2000年10月5日(木)11時17分 投稿者 江藤 巌
スペースシャトルSTS-92の打ち上げまであと約1日となったが、カウントダウンはTマイナス11時間(打ち上げまで11時間)でホールド(休止)中である。これはスケジュール通りで、これまでのところ大きなトラブルは発生していない。カウントダウンは5日の午前5時43分に再開する。
心配される天候だが、前線の接近で低い雲が垂れ込め、打ち上げ当日は緊急着陸の条件を満たさない可能性は低くない。5日夜に打ち上げが行えない場合には、打ち上げは約23時間半延期されて6日夜(日本時間日昼)の再度のトライが行われるが、現在の天気予報では7日の天候も思わしくない。
FLORIDA TODAYの打ち上げ速報。
打ち上げ当日のカウントダウン進行は以下のとおり。
Launch Day (Thursday, Oct. 5)
*Move Rotating Service Structure (RSS) to the park position (1:30 a.m.)
*Perform ascent switch list
*Fuel cell flow-through purge complete (5:43 a.m.)
Resume countdown at T-11 hours (5:43 a.m.)
*Activate the orbiter's fuel cells (6:53 a.m.)
*Clear the blast danger area of all non-essential personnel
*Switch Discovery's purge air to gaseous nitrogen (7:58 a.m.)
Enter planned 2-hour built-in hold at the T-6 hour mark (10:43 a.m.)
*Launch team verifies no violations of launch commit criteria prior to cryogenic loading of the external tank
*Clear pad of all personnel
*Chilldown of propellant transfer lines (12:13 p.m.)
*Begin loading the external tank with about 500,000 gallons of cryogenic propellants (about 12:43 p.m.)
Resume countdown (12:43 p.m.)
*Complete filling the external tank with its flight load of liquid
hydrogen and liquid oxygen propellants (about 3:43 p.m.)
*Final Inspection Team proceed to launch pad
Enter planned 2-hour built-in hold at T-3 hours (3:43 p.m.)
*Perform inertial measurement unit preflight calibration
*Align Merritt Island Launch Area (MILA) tracking antennas
*Perform open loop test with Eastern Range
Resume countdown at T-3 hours (5:43 p.m.)
*Crew departs Operations and Checkout Building for the pad (at 5:48 p.m.)
*Complete close-out preparations in the white room
*Check cockpit switch configurations
*Flight crew begins entry into the orbiter (about 6:18 p.m.)
*Astronauts perform air-to-ground voice checks with Launch and Mission Control
*Close Discovery's crew hatch (7:33 p.m.)
*Begin Eastern Range final network open loop command checks
*Perform hatch seal and cabin leak checks
*Complete white room close-out
*Close-out crew moves to fallback area
*Primary ascent guidance data is transferred to the backup flight system
Enter planned 10-minute hold at T-20 minutes (8:23 p.m.)
*NASA Test Director conducts final launch team briefings
*Complete inertial measurement unit preflight alignments
Resume countdown at T-20 minutes (8:33 p.m.)
*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
Enter estimated 45-minute hold at T-9 minutes (8:44 p.m.)
*Launch Director, Mission Management Team and NASA Test Director conduct final polls for go/no go to launch
Resume countdown at T-9 minutes (about 9:29 p.m.)
*Start automatic ground launch sequencer (T-9:00 minutes)
*Retract orbiter crew access arm (T-7:30)
*Start mission recorders (T-6:15)
*Start Auxiliary Power Units (T-5:00)
*Arm SRB and ET range safety safe and arm devices (T-5:00)
*Start liquid oxygen drainback (T-4:55)
*Start orbiter aerosurface profile test (T-3:55)
*Start main engine gimbal profile test (T-3:30)
*Pressurize liquid oxygen tank (T-2:55)
*Begin retraction of the gaseous oxygen vent arm (T-2:55)
*Fuel cells to internal reactants (T-2:35)
*Pressurize liquid hydrogen tank (T-1:57)
*Deactivate SRB joint heaters (T-1:00)
*Orbiter transfers from ground to internal power (T-0:50 seconds)
*Ground Launch Sequencer go for auto sequence start (T-0:31 seconds)
*SRB gimbal profile (T-0:21 seconds)
*Ignition of three Space Shuttle main engines (T-6.6 seconds)
*SRB ignition and liftoff (T-0)
SUMMARY OF STS-92 LAUNCH DAY CREW ACTIVITIES
Thursday, Oct. 5
9:30 a.m.Crew wake up
10:30 a.m.Breakfast
*4:38 p.m.Snack and photo
5:08 p.m.Weather briefing (CDR, PLT, MS2)
5:08 p.m.Don flight suits (MS1, MS3, MS4, MS5)
*5:18 p.m.Don flight suits (CDR, PLT, MS2)
*5:48 p.m.Depart for launch pad
*6:18 p.m.Arrive at white room and begin ingress
*7:33 p.m.Close crew hatch
*9:38 p.m.Launch
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