Flight 188 - uppsagd

Data relating to Flight 188FLUID SYSTEMSH 0 - 6 min 30sTermination of topping up (LOX and LH 2 )LOX and LH 2 topped up to flight valueLaunch pad safety flood valves openedELECTRICAL SYSTEMSH 0 - 6 min 30sArming of pyrotechnic line safety barriersH 0 - 6 min: Isolation of the ESC-A helium sphereH 0 - 4 minFlight pressurization of EPC tanksIsolation of tanks and start of EPC ground/OBinterface umbilical circuit flushingTermination of ESC-A LOX topping upESC-A LOX transition to flight pressureH 0 - 3 min 40: termination of ESC-A LH2 topping upH 0 - 3 min10: ESC-A LH 2 transition to flight pressureH 0 - 2 min: Vulcain bleeder valves openedEngine ground chill-down valve closedH 0 - 1min 5sTermination of ESC-A tank pressurization from theground, and start of ESC-A valve plate sealtightnesscheckoutH 0 - 30sVerification of ground/OB umbilical circuitflushingEPC flue flood valves openedH 0 - 16.5 sPressurization of POGO corrector systemVentilation of fairing POP and VEB POEconnectors and EPC shut downH 0 - 3 min 30 : Calculation of ground H 0 andverification that the second OBC has switched tothe observer modeH 0 - 3 minH 0 loaded in the 2 OBCsH 0 loaded in OBCs checked against ground H 0H 0 - 2 min 30s: Electrical heating of EPC and VEBbatteries, and electrical heating of the Vulcain 2ignition system shut downH 0 - 1 min 50sPre-deflection of the HM7B nozzleH 0 - 1min 5sLauncher electrical power supply switched fromground to OBH 0 - 37sStart-up of ignition sequence automatic controlsystemStart-up of OB measurement recordersArming of pyrotechnic line electric safety barriersH 0 - 22sActivation of launcher lower stage attitude controlsystemsAuthorization for switchover to OBC controlH 0 - 12 s Flood valves opening command30