Flight 188 - uppsagd

Data relating to Flight 188Synchronized sequenceThese operations are controlled exclusively and automatically by the ELA3 operationalcheckout-command (CCO) computer. During this sequence, all the elements involved in thelaunch are synchronized by the “countdown time” distributed by the CSG.During the initial phase (up to H 0 - 6s), the launcher is gradually switched to its flightconfiguration by the CCO computer. If the synchronized sequence is placed on hold, thelauncher is returned automatically to its configuration at H 0 - 7 min.In the second, irreversible phase of the sequence (H 0 - 6 s to H 0 - 3.2 s), the synchronizedsequence is no longer dependent on CGS countdown time, and operates on an internal clock.The final phase is the launcher ignition phase. The ignition sequence is controlled directly bythe on-board computer (OBC). The ground systems execute a number of actions in parallel withthe OB ignition sequence.29