3 ms·

The webcast showed T - 0:00:13

• mrkgnao 10y ago
  That's what the timer reading froze at, but is that the same as the time when an abort sequence was initiated? This is the first time that I saw a livestream where an abort happened, so I'm curious. Is the timer freeze standard?
  • manarth 10y ago
    is that the same as the time when an abort sequence was initiated? You can watch it on SpaceX' video - the instruction 'hold hold hold" is given at T-00:00:15, the clock freezes a couple seconds later, and shortly after that, you hear "launch abort is started". https://www.youtube.com/watch?time_continue=1834&v=V5bG37hzwqk https://www.youtube.com/watch?time_continue=1834&v=V5bG37hzw... Is the timer freeze standard? It's mission dependent. Some missions allow for the clock to be paused, then resumed [1]. Some missions have prearranged holds [2] built into the mission plan. For a mission to the ISS, the launch window is too short to hold then resume, so a hold on an ISS launch is effectively a launch abort. [1] https://en.wikipedia.org/wiki/Space_shuttle_launch_countdown https://en.wikipedia.org/wiki/Space_shuttle_launch_countdown [2] https://en.wikipedia.org/wiki/Built-in_hold https://en.wikipedia.org/wiki/Built-in_hold