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EPISODE · Feb 21, 2026 · 9 MIN

Successful SLS Wet Dress Rehearsal

from The SpaceInfo Podcast · host SpaceInfo Club

During the February 19–20 countdown simulation, engineers fully fueled the SLS core and upper stages with hundreds of thousands of gallons of cryogenic propellant, executed multiple countdown holds, and validated terminal count procedures that mirror launch day operations. Teams also rehearsed closing out the Orion crew module and verified performance of critical ground support systems.

During the February 19–20 countdown simulation, engineers fully fueled the SLS core and upper stages with hundreds of thousands of gallons of cryogenic propellant, executed multiple countdown holds, and validated terminal count procedures that mirror launch day operations. Teams also rehearsed closing out the Orion crew module and verified performance of critical ground support systems.

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Successful SLS Wet Dress Rehearsal

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This episode was published on February 21, 2026.

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During the February 19–20 countdown simulation, engineers fully fueled the SLS core and upper stages with hundreds of thousands of gallons of cryogenic propellant, executed multiple countdown holds, and validated terminal count procedures that...

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