As the primary human moon mission in many years approaches two weeks earlier than its prime launch date, NASA has so much to do earlier than it will possibly get 4 astronauts into area on Feb. 6.
Artemis 2 is scheduled for a 10-day mission to convey 4 astronauts across the moon: NASA’s Reid Williams (commander), Victor Glover (pilot) and Christina Koch (mission specialist), together with Canadian House Company astronaut and mission specialist Jeremy Hansen.
“Why do we think that we’ll be successful in Artemis 2 is, it’s the lessons that we learned,” said Artemis 2 launch director Charlie Blackwell-Thompson in a NASA press conference at KSC on Jan. 16, the day earlier than SLS arrived at its launch pad. “Artemis 1 was a check flight, and we discovered so much throughout that marketing campaign attending to launch,” she added.
Highway to launch
Artemis 2’s SLS and Orion left the Car Meeting Constructing (VAB) at KSC on Saturday at 7:01 a.m. EST (1201 GMT), reaching the pad almost exactly 12 hours later. On Jan. 16, Blackwell-Thompson said the team anticipated almost immediately connecting to (and validating connections to) ground systems, fueling systems, and the firing room. Everything will also need to be powered on.
The rocket’s crew access arm, which allows the four astronauts and their support teams to reach the Orion spacecraft, will go through some test swings, she said. The emergency egress system, a basket system designed to bring the astronauts away from SLS in case of urgent issues before launch, will be configured. “Checkouts” for the pad and radio-frequency communications, along with booster servicing, will also be performed.
While Blackwell-Thompson did not share specific timings of these events (perhaps because, as officials keep saying, the timeline needs to be flexible due to the developmental nature of the mission), she noted that the astronauts will participate directly in a second “countdown demonstration test”, following the first they did in December atop the rocket while inside the VAB. The second countdown, she added, will include “a walk-down of the emergency egress system.”
Wet dress rehearsal
What everyone will be watching for, however, is the “wet dress rehearsal”—or testing of fueling and procedures during a simulated countdown—that NASA hopes to finish no later than Feb. 2, or four days before the Artemis 2 launch window opens on Feb. 6.
“During wet dress, teams demonstrate the ability to load more than 700,000 gallons of cryogenic propellants into the rocket, conduct a launch countdown, and practice safely removing propellant from the rocket without astronauts onsite,” NASA officials wrote of the procedure Jan. 9.
It is a consequential second not just for NASA and its mission companions, but in addition for the area neighborhood at giant, as a result of the Artemis 1 mission required a minimum of 4 moist costume rehearsal makes an attempt earlier than NASA deemed the rocket protected to launch.
Blackwell-Thompson (who also helmed launch operations for Artemis 1) said NASA has learned a few things since then.
“It was a brand new vehicle,” she acknowledged, saying part of the process was learning how to safely load liquid oxygen using the “legacy hardware” that has fueled other missions at KSC for decades. After the first two wet dress rehearsals, the team learned how to better regulate the fueling temperatures, she said.
Then hydrogen leaks arose during the third rehearsal, which led to NASA not only changing the way in which liquid hydrogen is loaded, but also modifying the ground umbilical plates that ship energy, coolant, gas and communications to the rocket, in line with Blackwell-Thompson.
The group “made some modifications to that interface between the flight plate and the bottom plate” to keep away from the hydrogen leaks “the place you could have the flex hoses and the connections on the again of the plate.” When leaks arose in a “cavity”—the place floor plates come collectively—this was addressed by way of modifying “the circulate charges, the temperatures, the pressures,” she stated.
A “replenish valve” within the floor gear, which additionally proved difficult to handle throughout moist costume rehearsals, led to a design modification for Artemis 2. Cryogenic or super-cool fuels have already been examined with that valve “with as many cycles as we’d count on to have throughout Artemis 2,” Blackwell-Thompson stated.
Blackwell-Thompson emphasised the group is ready to take their time, and can solely launch when they’re safely prepared. Whereas Feb. 6 is the prime launch date for Artemis 2, home windows can be found in February, March and April in any case.
“We have to get by way of moist costume. We have to see what classes that we be taught on account of that. And that can finally lay out our path towards launch,” Blackwell-Thompson stated. “With a moist costume that’s with out vital points, if every part goes to plan, then definitely there are [launch] alternatives inside February that may very well be achievable.”
