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SpaceGo / No-Go Poll Basics
Twenty flashcards on the go / no-go polls of a real launch day, from NASA's Artemis I and Artemis II countdowns.
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20 cards
- Who ran the go/no-go poll before Artemis II entered terminal count?
- Artemis II Launch Director Charlie Blackwell-Thompson.
- What does that final go/no-go poll decide?
- Whether the team proceeds with the last 10 minutes of the countdown, known as terminal count.
- What poll result means the mission is ready to proceed toward launch?
- A unanimous "go" across the board.
- Which go/no-go decision comes first on Artemis II launch day, and when?
- At L-10H50M the launch team decides "go" or "no-go" to begin tanking the rocket.
- What was the first fueling step after the official "go" for tanking?
- Chilldown of the core stage liquid oxygen and liquid hydrogen transfer lines.
- On Artemis I, what came right before the go/no-go to begin tanking?
- A weather and tanking briefing (L-10H40M to L-9H50M); the go/no-go followed at L-9H40M.
- What did Artemis I managers review before giving the "go" to proceed toward launch?
- The status of countdown operations and two open technical items.
- Which two open technical items were reviewed for Artemis I?
- Caulk on a seam of Orion's launch abort system, and an electrical connector on the hydrogen tail service mast umbilical.
- Why did Artemis I managers accept the caulk issue?
- They found a low likelihood that more material tearing off would pose a critical risk to the flight.
- What does the launch director do near the end of the countdown, per the Artemis I milestones?
- Polls the team to make sure they are "go" for launch.
- Which safety system, if not assured, would have made Artemis II "no-go"?
- The flight termination system: without assurance it would work, the launch would be no-go.
- What does the flight termination system allow?
- The ground can send a signal to destruct the rocket if it veers off course during ascent, to protect public safety.
- How was the Artemis II flight termination system issue cleared?
- Engineers resolved the hardware issue and ran a confidence test to confirm it was ready.
- What weather odds did Artemis II have on launch day?
- 80% favorable conditions during the window, later upgraded to 90% go for launch.
- What were the main weather concerns for Artemis II?
- The cumulus cloud rule, the flight through precipitation rule and ground winds.
- Who tracks launch weather with NASA at Kennedy?
- Weather officials of the U.S. Space Force's Space Launch Delta 45.
- What did engineers conclude about the hot sensor on the launch abort system battery?
- It was believed to be an instrumentation issue that would not affect the launch.
- What changes when the closeout crew leaves the pad?
- Responsibility shifts to the launch control team for the final countdown.
- What command does the ground launch sequencer (GLS) send at T-33 seconds?
- The "go for automated launch sequencer" command.
- What is the commander told at T-5M20S?
- That launch abort system (LAS) capability is available.
Official sources
National Aeronautics and Space Administration (NASA)
Artemis II Launch Day Updates (April 1, 2026)
National Aeronautics and Space Administration (NASA)
Managers Give "Go" to Proceed Toward Launch, Countdown Progressing (Artemis I, Nov. 14, 2022)
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