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[engines start] roaring
(female voice) Five. Four. Three. Two. One.
[quieter] rumbling
[louder] roaring
(female voice) And liftoff.
(launch control) Ten.
(launch control) GLS is go for main engine start.
(mission specialist 2) The water flow, that's pretty cool.
(pilot) They start.
(pilot) Three at a hundred.
(mission specialist 2) 102, 102.
(commander) Clear. 1-1000, 2-1000, 3-1000.
(commander) We're rolling.
(commander, on radio) Roll program.
(communications) Roger roll, Discovery.
(pilot) Digitals.
(commander) Mach (point) eight-six.
(pilot) Throttling.
(pilot) 3 at 71.
(commander) Mach 1.17.
(pilot) Throttling.
(pilot) 3 at 104.
(communications) Discovery, Houston. Go at throttle up.
(commander, on radio) Go at throttle up.
(commander) Looking good, guys.
(mission Specialist 1) 90 seconds.
(commander) 90 seconds, 39 degrees.
(commentator) Discovery's now 21 miles away from its launch pad,
and 22 miles in altitude traveling 2700 miles per hour.
Solid rocket boosters alone are burning 11,000 pounds of propellent per second.
All three main engines are working just as expected.
The three fuel cells are generating power,
and three auxiliary power units are all producing pressure.
In short, all systems continuing to function well.
(mission specialist 2) PC less than 50.
(commander) PCs. Ahhh.
(mission specialist 2) 103, 103.
(mission specialist 2) That was bright. That's cool.
(commander) TMECOs are looking good to me.
(pilot) Hey, they look like they've converged. The OMS assist has started --
(mission specialist 1) You can close your suit O2 and open your visor.
- Alright. - Alright.
(pilot) Smooth ride.
(mission specialist 2) That is smooth.