For the Space Shuttle, a five-volume set, Shuttle Countdown (KSC S0007), often referred to as "S0007", was used. The procedures for each launch are written carefully. Security personnel prevent unauthorized persons from entering the "keep-out" area.Launch personnel monitor the weather and wait for the launch window.Launch-center computers communicate with sensors in the rocket, which monitor important systems on the launch vehicle and payload.Aerospace personnel bring the rocket vehicle to the launch site and load it with payload and propellants.Depending on the type of vehicle used, countdowns can start from 72 to 96 hours before launch time. By that time everything that needs doing has been done, and therefore everybody has twenty minutes in which to think of what may not have been done, or else what could possibly go wrong.Ī countdown is a carefully devised set of procedures ending with the ignition of a rocket's engine. People involved in countdowns always say that the last twenty minutes are the worst.
Timer 30 minutes rocket movie#
One of the first known associations with rockets was in the 1929 German science fiction movie Frau im Mond (English: Woman in the Moon) written by Thea von Harbou and directed by Fritz Lang in an attempt to increase the drama of the launch sequence of the story's lunar-bound rocket. An early use of a countdown once signaled the start of a Cambridge University rowing race. Other events for which countdowns are commonly used include the detonation of an explosive, the start of a race, the start of the New Year, or any anxiously anticipated event. NASA commonly employs the terms "L-minus" and "T-minus" during the preparation for and anticipation of a rocket launch, and even "E-minus" for events that involve spacecraft that are already in space, where the "T" could stand for "Test" or "Time", and the "E" stands for "Encounter", as with a comet or some other space object. 2015 FIFA Women's World Cup countdown at Champlain Place, Dieppe, New BrunswickĪ countdown is a sequence of backward counting to indicate the time remaining before an event is scheduled to occur.
For the Canadian hip-hop producer, see T-Minus (record producer).
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