TEST RUN of the Artemis 1 launch, including fueling the SLS rocket and counting down to T - 33 seconds, at which point a "cut-off" command will be issued. The system will be recycled back to T - 10 minutes, and the final countdown will be repeated. There will be NO LAUNCH, and no firing of the engines; this is just a "wet dress rehearsal".
TIMELINE:
-=[ Saturday, June 18 ]=-
- 8:00 am EDT (12:00 UTC) Live launch pad views begin (this stream).
- 5:00 pm EDT (21:00 UTC), L-45h 40m, Launch teams arrive at their stations, countdown begins.
- 5:40 pm EDT (21:40 UTC), L-45h, Sound suppression system water tank filled.
- 9:40 pm EDT (01:40 UTC), L-41h, Orion spacecraft power up start.
-=[ Sunday, June 19 ]=-
- 3:20 am EDT (07:20 UTC), L-35h 20m, SLS core stage powered up.
- 8:10 am EDT (12:10 UTC), L-30h 30m, Final prep of four RS-25 engines complete.
-=[ Monday, June 20 ]=-
- 1:50 am EDT (05:50 UTC), L-12h 50m, SLS interim cryogenic propulsion stage (ICPS) powered up.
- 2:40 am EDT (06:40 UTC), L-12h, All non-essential personnel leave LC-39B.
- 6:00 am EDT (10:00 UTC), L-8h 40m, Built-in 90-minute hold begins.
- 6:20 am EDT (10:20 UTC), L-8h 20m, Weather & tanking briefing.
- 6:50 am EDT (10:50 UTC), L-7h 50m, "Go" / "no-go" poll to begin tanking the rocket.
- 7:00 am EDT (11:00 UTC), L-7h 40m, NASA live commentary of tanking operations begins (will be included here in this stream).
- 7:35 am - 12:40 pm EDT (11:35-16:40 UTC) Core stage and ICPS fueling operations and tests.
- 10:20 am EDT (14:20 UTC), L-4h 20m, Orion comm system activation.
- 2:00 pm EDT (18:00 UTC), L-40m, Final NASA test director briefing; built-in 30-minute hold begins.
- 2:25 pm EDT (18:25 UTC), L-15m, "Go" / "no-go" poll for terminal count.
- 2:30 pm EDT (18:30 UTC), T-10 minutes countdown begins for WDR Run 1.
- 2:41 pm EDT (18:41 UTC), T-33 seconds, "Cut-off" command automatically executed.
Vehicle will be "safed", and recycled back to T-10 minutes for WRD Run 2. Recycling will take about 1 hour.
- Approx. 3:40 pm EDT (19:40 UTC), T-10 minutes countdown begins for WDR Run 2.
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