Launch Countdown
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Zvezda Launch Countdown

MET GMT  Eastern Time  EVENT
T-8 hrs 2056:28 4:56:28 p.m. -- Power up Proton booster avionics & verify condition of main avionics systems
T-7 hrs, 20 min 2136:28 4:36:28 p.m. -- Power up 'Zvezda' command & control system heaters
T-7 hrs 2156:28 5:56:28 p.m. -- Power up 'Zvezda' telemetry to verify onboard systems
-- Start data recorders
T-6 hrs, 30 min 2126:28 5:26:28 p.m. -- Turn off telemetry system and power down electric buses
T-6 hrs 22:56:28 6:56:28 p.m. -- Begin loading Proton oxidizer (2 hrs, 40 min duration)
T-4 hrs, 20 min 0036:28 8:36:28 p.m. -- Begin loading Proton propellant (1 hr, 10 min duration)
T-2 hrs, 40 min 0216:28 10:16:28 p.m. -- Thermal conditioning of Proton and 'Zvezda'
T-1 hr, 10 min 0346:28 11:46:28 p.m. -- Retract service umbilical
-- Ventilate & purge gas cavities of Proton propellant tanks
-- Activate ground system electrical bus
-- Set start time for launch sequence mechanism and synchronize it with the universal time system
T-1 hr, 5 min 0351:28 11:51:28 p.m. -- Adjust Proton booster trajectory
T-1 hr 0356:28 11:56:28 p.m. -- Power up ground station data handling complex
-- Power up 'Zvezda' electrical buses and telemetry systems
T-45 min 0411:28 12:11:28 a.m. -- 'Zvezda' launch sequence initiated
T-40 min 0416:28 12:16:28 a.m. -- Radiotelemetry system activated
T-35 min 0421:28 12:21:28 a.m. -- Thermal control system activated
T- 33 min 0423:28 12:23:28 a.m. -- Motion Control System activated in pre-launch mode
T- 32 min 0424:28 12:24:28 a.m. -- Final alignment of gyroscopes for required liftoff azimuth
T-30 min 0426:28 12:26:28 a.m. -- Command and control system activated
T-25 min 0431:28 12:31:28 a.m. -- Fine tuning of gyro-stabilized launch platform of the Proton's trajectory control system in the horizon plane and line of the azimuth
T-20 min 0436:28 12:36:28 a.m. -- Trajectory measurement system activated
T-18 min 0438:28 12:38:28 a.m. -- 'Zvezda' telemetry system activated
T-15 min 0441:28 12:41:28 a.m. -- Onboard telemetry monitoring system activated
-- Thermal monitoring of Proton booster engines
T-12 min 0444:28 12:44:28 a.m. -- Initiate rotation of gyro-stabilized platform of Proton trajectory control system
T-10 min 0446:28 12:46:28 a.m. -- Ground systems ready
T-9 min 0447:28 12:47:28 a.m. -- Power switched from ground to 'Zvezda' onboard batteries
T-8 min 0448:28 12:48:28 a.m. -- Steering jets of all booster stages confirmed in 'zero position'
-- Ground command receives 'control systems ready' message
-- Ground command receives 'auxiliary systems read' message
T-5 min 0451:28 12:51:28 a.m. -- Final launch operation program initiated
T-4 min 0452:28 12:52:28 a.m. -- Telemetry monitoring system switched to onboard power supply
T-3 min, 30 sec 0452:58 12:52:58 a.m. -- 'Zvezda' telemetry system recording activated
T-3 min 0453:28 12:53:28 a.m. -- Power up of ground station recorders
T-2 min 0454:28 12:54:28 a.m. -- Ground command receives 'main block ready' command
T-1 min 0455:28 12:55:28 a.m. -- Ground station recorders activated
T-2.5 sec 0456:25.5 12:56:25.5 a.m. -- Time launch sequence mechanism issues ignition command for first stage engines
-- Proton control system switched to onboard power supply
T-1.6 sec 0456:26.4 12:56:26.4 a.m. -- Onboard system issues full-thrust command to engines
T Zero 0456:28 12:56:28 a.m. -- LAUNCH
+2 min, 6 sec 0458:34 12:58:34 a.m. -- First stage separation (27.1 miles, 43.6 kilometers)
+3 min, 3 sec 0459:31 12:59:31 a.m. -- Launch shroud jettison (48.6 miles, 78.2 km - removal of Proton nose fairing)
-- Shroud panels deploy two folded command and control antennae and the telemetry system antenna on 'Zvezda'
+5 min 0501:28 1:01:28 a.m. -- Begin telemetry recording of 'Zvezda' module
+5 min, 34 sec 0502:02 1:02:02 a.m. -- Second stage separation (85.9 miles, 138.3 km)
+5 min, 50 sec 0502:18 1:02:18 a.m. -- Prepare 'Zvezda' propulsion system for operations (30 seconds in duration)
+9 min, 37 sec 0506:05 1:06:05 a.m. -- Third stage main engine shutdown command initiated
+9 min, 47 sec 0506:15 1:06:15 a.m. -- Third stage separation command (114.9 miles, 185 km)
-- Third stage steering jet is deactivated
-- Pyro locks securing 'Zvezda' to booster are released
-- Third stage solid body fuel jets fire to separate booster from 'Zvezda'
+9 min, 49 sec 0506:17 1:06:17 a.m. -- 'Zvezda' command and control system activated
-- External elements deployment program initiated
+10 min, 5 sec 0506:33 1:06:33 a.m. -- Fire pyro pins to deploy 'Kurs' docking system antennae
+10 min, 9 sec 0506:37 1:06:37 a.m. -- Deactivate telemetry system used during ascent
+10 min, 11 sec 0506:39 1:06:39 a.m. -- Start spin-up of control system gyro motors
+10 min, 37 sec 0507:05 1:07:05 a.m. -- Initiate 'Kurs' rendezvous antennae deployment
-- 'Lira' telemetry antenna deployment
+12 min, 20 sec 0508:48 1:08:48 a.m. -- Initiate trim of residual angular rates (27 seconds in duration)
+13 min, 20 sec 0509:48 1:09:48 a.m. -- Solar array deployment (two minutes in duration)




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Updated: 07/06/2000

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