ATV-4 Launch Timeline

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ATV-4 Launch Timeline

  1. 1. H Countdown Kourou timeGMT Time Central Europe EventH0‐ 05:22:00 13:30:13 16:30:13 18:30:13 ATV status is OK, GO for EPC fuellingH0‐ 05:00:00 13:52:13 16:52:13 18:52:13 General weather forecast briefing before EPC fuelling and high‐wind altitude criteria H0‐ 04:38:00 14:14:13 17:14:13 19:14:13 EPC fuelling startsH0‐ 04:00:00 14:52:13 17:52:13 19:52:13 ATV‐CC status report: GO/NO ATV‐CC status report || GO/NO‐GO for Russian ground segment, TDRS, GPS & US ground segmentH0‐ 01:25:00 17:27:13 20:27:13 22:27:13 ATV data loading is OK H0‐ 01:09:00 17:43:13 20:43:13 22:43:13 Launch pad is OK for final operationsH0‐ 00:30:00 18:22:13 21:22:13 23:22:13 ATV‐CC status report (GO/NO‐GO check point)H0‐ 00:11:00 18:41:13 21:41:13 23:41:13 ATV switched to on‐board power H0‐ 00:07:30 18:44:43 21:44:43 23:44:43 ATV ready for launch H0‐ 00:07:00 18:45:13 21:45:13 23:45:13 Start of synchronized sequence H0‐   00:04:00 18:48:13 21:48:13 23:48:13 Tanks pressurized for flightH0‐ 00:01:00 18:51:13 21:51:13 21:52:13 Switch to on‐board power modeH0‐ 00:00:04 18:52:09 21:52:09 23:52:09 On‐board systems take over H0‐  00:00:03 18:52:10 21:52:10 23:52:10 Unlocking of guidance systems to flight modeH0   00:00:00 18:52:13 21:52:13 23:52:13 Ho+07s booster (EAP) ingnition (liftoff)H0+ 00:02:22 18:54:35 21:54:35 23:54:35 Solid boosters (EAP) separationH0+ 00:03:26 18:55:39 21:55:39 23:55:39 Fairing jettisonedH0+ 00:08:54 19:01:07 22:01:07 00:01:07 Shut‐down main cryogenic stage (EPC) H0+ 00:09:00 19:01:13 22:01:13 00:01:13 Separation of main cryogenic stageH0+ 00:09:07 19:01:20 22:01:20 00:01:20 Ignition of storable propellant stage (EPS)H0+ 00:17:18 19:09:31 22:09:31 00:09:31 Positive end of EPS first boostH0+ 00:59:23 19:51:36 22:51:36 00:51:36 Positive EPS second boost ignitionH0+ 00:59:51 19:52:04 22:52:04 00:52:04 Positive end of EPS second boostH0+ 01:03:50 19:56:03 22:56:03 00:56:03 Separation ATV H0+ 01:04:20 19:56:33 22:56:33 00:56:33 Separation ATV detected at ATV‐CCH0+ 01:28:13 20:20:26 23:20:26 01:20:26 Start of Solar Array deployment (Sep +24m23s, nominal duration 5 to 10 min)H0+ 01:38:13 20:30:26 23:30:26 01:30:26 End of Solar Array DeploymentH0+ 02:30:00 21:22:13 00:22:13 02:22:13 Deployment of Proximity Link (ADB) boomKourou Time + 5hrs= Central European Time (CEST) EPC ignition (engine start)

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