WEBVTT

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GEORGE DILLER: Thirteen, twelve, green status board.

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Ten, nine, eight, seven, six, five, four, three, two, main engine start, one,

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zero and liftoff of the Delta II rocket with Dawn, using ion propulsion

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to reach the catalysts of our solar system.

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MARK LAVIGNE: Coming up on T+25 seconds.

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The vehicle has worked its way nicely at the transience of liftoff.

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Coming up on Machs – correction,
Mach 1. We've exceeded the speed of sound, <br>

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and coming up on Max Q. The vehicle is now three miles altitude,

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downrange distance 12 miles,

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with a velocity of over 1,600 miles per hour.

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DILLER: Listening to telemetry manager Mark Lavigne.

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LAVIGNE: Both verniers and the main engine chamber pressure still looking good.

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Reaching solid motor burnout, the first six motors.

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And burnout confirmed. Jettison, solid motor jettison.

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And we've ignited the air-start motors.