![]() The Ground Launch Sequencer (GLS), which is an automated program that controls all activity during the final portion of the countdown, will assume automatic control of the countdown at the T-minus 9 minute mark. These technicians closely monitor computer displays and gauges that show the performance of the shuttle's systems at the launch pad.Īfter the T-minus 9 minute built-in hold, the countdown will resume. During the hold, NASA officials on consoles will be polled for their "go/no go" decisions.
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