Overview
- The 322-foot SLS and Orion stack rolled roughly 4 miles back to Launch Complex 39B overnight at about 1 mph, with high winds briefly delaying the journey.
- NASA plans the first launch attempt for April 1 at 6:24 p.m. ET within a two-hour window, with additional opportunities through April 6 before a likely multiweek slip.
- Commander Reid Wiseman, Victor Glover, Christina Koch and CSA astronaut Jeremy Hansen are in preflight quarantine and are expected to arrive at Kennedy Space Center about five days before liftoff.
- Engineers fixed out-of-place seals in an upper-stage helium quick-disconnect, replaced and recharged multiple batteries, and previously addressed a hydrogen leak, with officials indicating the next propellant load will be for launch.
- Mission teams will monitor solar activity in real time, and Orion carries cabin sensors and crew dosimeters to track exposure, with protective procedures planned and baseline dose estimated near a one‑month ISS stay.