Michael Wall is a Senior Space Writer with Space.com and joined the team in 2010. He primarily covers exoplanets, spaceflight and military space, but has been known to dabble in the space art beat. His book about the search for alien life, 'Out There,' was published on Nov. 13, 2018. Before becoming a science writer, Michael worked as a herpetologist and wildlife biologist. He has a Ph.D. in evolutionary biology from the University of Sydney, Australia, a bachelor's degree from the University of Arizona, and a graduate certificate in science writing from the University of California, Santa Cruz. To find out what his latest project is, you can follow Michael on Twitter.
The call to stations"is a big milestone, because it is the time in which we are calling our teams, notifying them that the wet dress rehearsal test is officially underway," Charlie Blackwell-Thompson of KSC, the Artemis launch director for NASA's Exploration Ground Systems program, said during a news conference on Tuesday .
The call to stations also starts the 45-hour countdown clock ticking for the test. Over the next 24 hours following the call, Artemis 1 team members will check off a number of boxes, from filling the water tanks of the launch pad's sound-suppression system to powering up Orion and the SLS core stage.
But most of the action will take place on Sunday . Among other tasks on that day, the team will pump more than 700,000 gallons of propellant into the SLS tanks. At around 2:25 p.m. EDT on Sunday, the launch director will poll team members, asking if they're ready to enter terminal count ,That count will proceed all the way down to 33 seconds before"launch," when it will be stopped. The team will then recycle back to 10 minutes before T-0 and run through the steps again, this time stopping less than 10 seconds before liftoff.
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