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Ultima Modificación: 07-29-2014

Lanzamiento

Timeline - Lanzamiento del Transbordador Espacial.

TUL Time Until Launch   Time counting
OCC Official Countdown Time   Time On-Hold

 

T- HH:mm:ss T- HH:mm:ss Event Channel Remark Note:
TUL OCC        
  T-43:00:00 THE SHUTTLE TEST DIRECTOR PERFORMS THE TRADITIONAL CALL TO STATIONS AND THE COUNTDOWN CLOCK IS ACTIVATED. NTD    
BEGIN FINAL VEHICLE AND FACILITY CLOSE-OUTS FOR LAUNCH.      
CHECK OUT BACKUP FLIGHT SYSTEMS.      
REVIEW FLIGHT SOFTWARE STORED IN MASS MEMORY UNITS AND DISPLAY SYSTEMS.      
LOAD BACKUP FLIGHT SYSTEM SOFTWARE INTO THE ORBITER'S GENERAL PURPOSE COMPUTERS.      
REMOVE MIDDECK AND FLIGHT DECK PLATFORMS      
ACTIVATE AND TEST NAVIGATIONAL SYSTEMS.      
COMPLETE PREPARATION TO LOAD POWER REACTANT STORAGE AND DISTRIBUTION SYSTEM.      
COMPLETE FLIGHT DECK PRELIMINARY INSPECTIONS.      
T-27:00:00 CLEAR LAUNCH PAD OF ALL NON-ESSENTIAL PERSONNEL     THIS IS THE FIRST BUILT-IN HOLD AND TYPICALLY LASTS FOUR HOURS
BEGIN LOADING CRYOGENIC PROPELLANTS INTO ORBITER'S POWER REACTANT STORAGE AND DISTRIBUTION (PRSD) SYSTEM      
T-27:00:00 BEGIN OPERATIONS TO LOAD CRYOGENIC REACTANTS INTO THE ORBITER'S FUEL CELL STORAGE TANKS      
T-19:00:00 THIS BUILT-IN HOLD TYPICALLY LASTS FOUR HOURS, BUT MAY BE EXTENDED IF PRSD OFFLOAD IS REQUIRED.      
DEMATE THE ORBITER'S MIDBODY UMBILICAL UNIT      
CLEAN AND VACUUM CREW MODULE      
EXTERNAL TANK NOSECONE PURGE      
T-19:00:00 BEGIN FINAL PREPARATIONS OF THE ORBITER'S THREE MAIN ENGINES FOR MAIN PROPELLANT TANKING AND FLIGHT      
FILL LAUNCH PAD SOUND SUPPRESSION SYSTEM WATER TANK      
RESUME ORBITER AND GROUND SUPPORT EQUIPMENT CLOSE-OUTS      
CLOSE OUT THE TAIL SERVICE MASTS ON THE MOBILE LAUNCHER PLATFORM      
T-11:00:00 WEATHER AND ENGINEERING BRIEFINGS     THIS BUILT-IN HOLD VARIES BETWEEN 13 TO 14 HOURS.
PAD DEBRIS INSPECTION AND CLOSEOUT      
FLIGHT CREW EQUIPMENT LATE STOW      
MOVE ROTATING SERVICE STRUCTURE TO "PARK" POSITION      
ACTIVATE THE ORBITER'S INERTIAL MEASUREMENT UNITS AND COMMUNICATIONS SYSTEMS      
PERFORM ASCENT SWITCH LIST      
T-11:00:00 ACTIVATE THE ORBITER'S FUEL CELLS      
CLEAR THE BLAST DANGER AREA OF ALL NONESSENTIAL PERSONNEL      
SWITCH THE ORBITER'S PURGE AIR TO GASEOUS NITROGEN      
T-06:00:00 MISSION MANAGEMENT TEAM AND LAUNCH DIRECTOR RECEIVE WEATHER UPDATE     THIS BUILT-IN HOLD TYPICALLY LASTS TWO HOURS, OR ONE HOUR FOR A 24- OR 48-HOUR SCRUB.
LAUNCH TEAM VERIFIES NO VIOLATIONS OF LAUNCH COMMIT CRITERIA BEFORE LOADING THE EXTERNAL TANK WITH PROPELLANTS      
CLEAR PAD OF ALL PERSONNEL      
CHILL-DOWN OF PROPELLANT TRANSFER LINES      
BEGIN LOADING THE EXTERNAL TANK WITH ABOUT 500,000 GALLONS OF CRYOGENIC PROPELLANTS      
T-06:00:00 THE COUNT HAS RESUMED
  NTD, ALL NEXT PLANNED HOLD -> T-03:00:00
THIS IS THE RE-ENTRY POINT FOR 24 HOUR SCRUB/TURNAROUND OPERATIONS      
PERFORM ET TPS ICE/FROST & DEBRIS EVALUATION 136 TBC, CICE  
ET READY FOR LOX & LH2 LOADING 232 NTD, TBC  

VERIFY NO INCREASE ABOVE BASELINE FOR H2 CONCENTRATION PRIOR TO START OF LOX/LH2 LOADING IN THE FOLLOWING LOCATIONS:

  • ORBITER PAYLOAD BAY
  • ORBITER LOWER MID BODY
  • ORBITER AFT FUSELAGE
132 OTC,CHGD  
ORBITER READY FOR LOX & LH2 LOAD 232 NTD,OTC  
PROCEED WITH LOX & LH2 LOAD 232,136 NTD,TBC  
INITIATE LOX TRANSFER LINE CHILLDOWN 232,136 NTD,TBC,CLOX  
INITIATE LH2 TRANSFER LINE CHILLDOWN 232,136 NTD,TBC,CLHY  
PERFORM OMS PROP TANK REPRESSURIZATION 132 OTC,COOS  
VERIFY SRB NOZZLE FLEX BEARING & SRB NOZZLE TO CASE JOINT TEMPERATURE REQUIREMENTS 136 TBC,CPWR  
ACTIVATE LCC MONITORING SOFTWARE 136 TBC,OTC  
T-05:50:00 LH2 FACILITY & ORBITER CHILLDOWN COMPLETE.      
INITIATE LH2 SLOW FILL TO 5% SENSORS WET      
LOX TRANSFER LINE CHILLDOWN COMPLETE      
INITIATE ORBITER MPS CHILLDOWN      
T-05:22:00 PERFORM IMU PREFLIGHT CALIBRATION      
T-05:20:00 ORBITER MPS CHILLDOWN COMPLETE.
INITIATE LOX SLOW FILL
     
T-05:15:00 LH2 ENGINE CUT OFF SENSORS WET      
T-05:10:00 LOX TRANSITION TO FAST FILL COMPLETE      
NOW IN FAST FILL TO 98%      
T-05:00:00 T LH2 5% SENSOR WET.      
INITIATE LH2 FAST FILL TO 98%      
MPS LH2 RECIRC PUMPS ACTIVATED MOMENTARILY      
T-04:40:00 MPS LH2 RECIRC PUMP ACTIVATION COMPLETE      
T-04:00:00 PERFORM MILA ANTENNA ALIGNMENT      
PERFORM LH2 ET ULLAGE PRESSURE TRANSDUCER NUMBER 4 VERIFICATION      
T-03:45:00 LH2 98% SENSOR IS WET. INITIATE TOPPING TO 100%      
ET BIPOD HEATERS ARE ACTIVATED      
PERFORM ORBITER/GSE PIC RESISTANCE TEST      
PERFORM SRB/ET PIC RESISTANCE TEST      
ASSEMBLE ICE CREW & CLOSEOUT CREW FOR PAD ENTRY      
T-03:30:00 SWITCH TO MILA SECONDARY ANTENNA & PROCEED WITH ALIGMENT      
T-03:10:00 THE COUNTDOWN CLOCK WILL HOLD AT T-03:00:00      
T-03:05:00 LH2 TOPPING IS COMPLETE      
INITIATE REPLENISH      
LOX IN STABLE REPLENISH      
LH2 IN STABLE REPLENISH      
MILA ANTENNA ALIGNMENT COMPLETE      
RESET ORBITER VENT DOOR COMMANDS      
PERFORM T-3 HR SNAPSHOT ON FLIGHT CRITICAL & PAYLOAD MDMS      
T-03:00:00 THE COUNTDOWN CLOCK IS HOLDING AT T-03H00M     THE NEXT PLANNED HOLD IS AT T-20M00S
ICE TEAM READY FOR PAD ENTRY      
CLEAR ICE TEAM & CLOSEOUT CREW TO PAD      
PERFORM ICE/DEBRIS INSPECTION      
INGRESS ORBITER CREW COMPARTMENT      
GO FOR FLIGHT CREW WAKE UP      
PERFORM COMM CHECKS      
ALL ORB TEST TEAM SWITCH TO CHNL 212      
CONFIGURE & INSPECT CREW MODULE FOR CREW INGRESS      
PERFORM POTABLE SUPPLY WATER ADJUST      
PERFORM IMU PRE-FLIGHT CALIBRATION      
PERFORM ER OPEN LOOP CHECKS      
ER OPEN LOOP CHECK COMPLETE      
VERIFY 4 HR 15 MIN JIMSPHERE HAS BEEN RELEASED      
PERFORM FLIGHT CREW WEATHER BRIEFING      
INSTALL LIOH CANISTERS      
POWER UP SRB TRACKING SYSTEM      
RESUME THE COUNT IN 5 MINUTES      
T-03:00:00 THE COUNT HAS RESUMED     THE NEXT PLANNED HOLD IS AT T-20 MINUTES
ICE/DEBRIS INSPECTION COMPLETE      
PRESSURIZE MPS HELIUM TANKS      
MONITOR PAYLOAD BAY & MIDBODY DURING HELIUM TANK PRESS      
PERFORM SRB RGA POWER UP & TORQUE TEST      
ACTIVATE SRB RGA LCC EXCEPTION MONITORING      
T-02:55:00 FLIGHT CREW DEPART O&C BUILDING TO PAD      
IDENTIFY ANY COLLISION AVOIDANCE TIMES FOR THIS LAUNCH WINDOW OR LAUNCH PERIOD      
T-02:45:00 CE DEBRIS REPORT      
VERIFY NO VIOLATION OF LAUNCH COMMIT CRITERIA      
T-02:40:00 VERIFY TLA SITES      
T-02:30:00 SWITCH STANDBY FRONT END PROCESSORS TO RF      
MPS HELIUM TANK PRESSURIZATION IS COMPLETE      
PERFORM ET LIQUID LEVEL SENSOR CHECKS      
PERFORM SRB MDM COUNTDOWN VERIFICATION      
INGRESS FLIGHT CREW & SEATS      
T-02:15:00 ET LIQUID LEVEL SENSOR CHECKS COMPLETE      
T-02:10:00 PERFORM POST INGRESS SWITCH RECONFIGURATION      
T-02:00:00 PERFORM GLS INITIALIZATION      
REPORT STATUS IN RETRIEVAL AREA      
ACTIVATE SRB HPU GAS GENERATOR HEATERS      
T-01:55:00 PERFORM FIRST MOTION SIMULATED SIGNAL TEST      
T-01:50:00 PERFORM ETR SRSS VERIFICATION TEST      
T-01:35:00 VERIFY ALL SYSTEMS READY FOR CREW MODULE CLOSEOUT      
T-01:30:00 PERFORM AIR TO GROUND VOICE CHECKS      
PERFORM SRM CHAMBER PRESSURE VERIFICATION      
T-01:20:00 THE COUNTDOWN CLOCK WILL HOLD     COUNTDOWN CONTINGENCY HOLD POINT
CLOSEOUT CREW COMPARTMENT HATCH      
PERFORM ER OPEN LOOP AUTOMATIC COMMAND      
CARRIER CONTROL VALIDATION TESTS      
T-01:10:00 PERFORM ETR HOLDFIRE CHECKS      
PERFORM FINAL COLLISION AVOIDANCE UPDATE      
PERFORM CABIN LEAK CHECK      
T-01:00:00 SRM CHAMBER PRESSURE VERIFICATION IS COMPLETE      
T-00:55:00 PERFORM S-BAND SYSTEM HIGH POWER/FM ACTIVATION      
T-00:50:00 PERFORM TERMINAL COUNT SRSS CLOSED LOOP TEST      
T-00:45:00 PERFORM GLS MAINLINE ACTIVATION      
PERFORM ORB/SRB LDB REDUNDANCY CHECKS      
T-00:40:00 GLS PRESEQUENCING HAS STARTED      
FINAL CABIN LEAK CHECKS COMPLETE      
PERFORM CABIN VENT      
T-00:32:00 PERFORM PASS/BFS TRANSFER PREPARATION      
T-00:30:00 PERFORM OMS GN2 PRESSURIZATION      
T-00:29:00 PERFORM MAIN ENGINE CONTROLLER PREFLIGHT BITE CHECK      
T-00:22:00 PERFORM PASS-BFS TRANSFER     THE COUNTDOWN CLOCK WILL HOLD AT T-20
CLOSE CABIN VENT VALVES      
T-00:20:00 CLEAR CLOSEOUT CREW FROM PAD      
T-00:20:00 THE COUNTDOWN CLOCK IS HOLDING AT T-20 MINUTES FOR A PLANNED HOLD OF 10 MINUTES      
REPORT HOLD TIME CONSTRAINTS      
REPORT LOX DRAINBACK HOLD TIME      
VERIFY CONSOLE PROGRAMS      
20 MINUTE RECYCLE ENTRY      
ALL TEST TEAM PERSONNEL SWITCH TO CHNL 212      
VERIFY STATUS OF LANDING SITES      
T-20 MIN BRIEFING:      
IMU PREFLIGHT ALIGNMENT IS COMPLETE.      
READY FOR TRANSITION TO OPS 1      
ACTIVATE GNC PROFILE MONITOR      
T-00:20:00 THE COUNTDOWN HAS RESUMED     THE NEXT HOLD WILL BE AT T-9 MINUTES
PERFORM FUEL CELL PURGE      
OPS TRANSITION IS COMPLETE      
T-00:18:30 BACKUP FLT SYSTEM TO OPS 1 TRANSITION IS COMPLETE      
T-00:18:00 PERFORM T-20 MINUTE GPC DUMP      
T-00:16:00 PERFORM BACKUP FLT SYSTEM PREFLIGHT      
UPLINK LOADING      
VERIFY WATER SPRAY BOILER QUANTITY      
PERFORM MPS HELIUM RECONFIGURATION      
T-00:15:00 OMS/RCS CROSSFEED VALVES CONFIGURED FOR FLIGHT      
INITIATE SRB AFT SKIRT GN2 PURGE HIGH FLOW RATE FOR LEFT & RIGHT SRBs      
T-00:13:00 FUEL CELL PURGE IS COMPLETE      
ADJUST FUEL CELL LOADS      
T-00:12:00 T-20 MINUTE GPC DUMP IS COMPLETE     THE COUNTDOWN CLOCK WILL HOLD AT T-9 MINUTES
T-00:09:30 VERIFY SRB HPU LEVELS      
T-00:09:00 THE COUNTDOWN CLOCK IS HOLDING AT T-9 MINUTES      

PLANNED HOLD

  • REDUCE PAYLOAD BAY PURGE FLOWRATE IF GREATER THAN 180 LBS/MIN
  • NTD LAUNCH READINESS POLL OF SHUTTLE LAUNCH TEAM
  • PERFORM NSTS OPERATIONS MANAGER'S
  • LAUNCH READINESS CHECK
  • VERIFY CAPE WEATHER FORECASTS MEETS LAUNCH
  • WEATHER CRITERIA
    FINAL "GO / NO GO"
THE COUNTDOWN CLOCK WILL RESUME IN 4 MINUTES      
PERFORM HGDS & BACKUP HGDS AUTO CALIBRATION      
REMOVE SRB IGNITER HEATER POWER      
RESUME THE COUNT      
T-00:09:00 THE COUNT HAS RESUMED      
GLS AUTO SEQUENCE HAS BEEN INITIATED      
SELECT PAYLOAD BAY SAMPLE LINE      
T-00:07:30 RETRACT ORBITER ACCESS ARM      
T-00:07:00 SELECT MIDBODY SAMPLE LINE      
T-00:06:15 PERFORM APU PRE-START      
SELECT ET INTERTANK SAMPLE LINE      
T-00:05:00 GO FOR APU START      
T-00:04:55 VERIFY ET/SRB RANGE SAFETY SYSTEM SAFING & ARM DEVICE ARMED      
VERIFY SRM IGNITION SAFING & ARM DEVICE ARMED      
TERMINATE LOX REPLENISH      
T-00:04:48 CLOSE LOX INBOARD F&D VALVE      
T-00:04:35 OPEN LOX DRAIN VALVE      
T-00:04:30 MAIN FUEL VALVE HEATERS OFF      
T-00:04:00 INITIATE SSME PURGE SEQUENCE      
VERIFY SSME VALVE MOVEMENT IN THE CLOSE DIRECTION      
T-00:03:55 INITIATE ORBITER AERO SURFACES PROFILE CHECK      
T-00:03:30 INITIATE MPS GIMBAL PROFILE CHECKS      
T-00:03:03 MPS ENGINES TO START POSITION      
VERIFY BODY FLAP TO LAUNCH POSITION      
T-00:03:00 SELECT AFT FUSELAGE SAMPLE LINE      
T-00:02:55 INITIATE ET LOX PRESSURIZATION      
TERMINATE SSME GN2 PURGE      
T-00:02:50 TERMINATE GOX VENT HOOD PURGE      
RETRACT GOX VENT HOOD      
T-00:02:35 PRSD TRANSFER TO INTERNAL REACTANTS      
T-00:02:00 CLOSE VISORS      
T-00:01:57 TERMINATE LH2 REPLENISH      
CLOSE LH2 TOPPING VALVE      
CLOSE LH2 VENT VALVE      
T-00:01:46 INITIATE LH2 PREPRESS      
T-00:01:30 T-1 MINUTE 30 SECONDS      
ET BIPOD HEATERS OFF      
T-00:01:00 T-1 MINUTE      
T-00:00:55 PERFORM SRB FWD MDM LOCKOUT      
VERIFY SRB MDM CRITICAL COMMANDS      
T-00:00:50 GROUND POWER REMOVAL      
T-00:00:48 CLOSE LOX & LH2 OUTBOARD FILL & DRAIN VALVES      
DEACTIVATE SRB JOINT HEATERS      
T-00:00:31

GLS GO FOR AUTO SEQUENCE

ARM CUT OFF

INITIATE RSL5

ORB VENT DOOR SE9 START

     
T-00:00:28 START SRB APU'S      
T-00:00:26 START SRB APU'S      
T-00:00:25 25 SECONDS      
T-00:00:21 START SRB GIMBAL TEST      
T-00:00:20 20 SECONDS      
T-00:00:16 ACTIVATE SOUND SUPPRESSION WATER      
T-00:00:15 15 SECONDS      
T-00:00:13 PERFORM SRB AFT MDMS LOCKOUT      
VERIFY LH2 HIGH POINT BLEED VALVE CLOSED TERMINATE MPS HELIUM FILL      
T-00:00:10 10 SECONDS      
FREE HYDROGEN BURN OFF SYSTEM IGNITION GLS GO FOR MAIN ENGINE START      
REMOVE ET/SRB RANGE SAFETY INHIBITS      
T-00:00:06.6 MAIN ENGINE 3 START COMMAND      
T-00:00:06.48 MAIN ENGINE 2 START COMMAND      
T-00:00:06.36 MAIN ENGINE 1 START COMMAND      
T-00:00:00 T-ZERO SRB IGNITION      
SRB HOLDDOWN RELEASE COMMAND      
LIFTOFF      
           
   
[ref: Space Shuttle launch countdown]  
[ref: NASA Countdown 101]