GEORGE DILLER: Pad water system is now on. T-15 seconds.
Launch vehicle armed.
Nine, eight, seven, six, five, four,
go for main engine start, three, two, one, zero and liftoff of the Delta II rocket with STEREO,
giving us a three-dimensional look at the physics of our sun.
And the vehicle is working its way through the liftoff's, liftoff transients.
Power motor chamber pressures all looking symmetrical.
Main engine burning verniers continue to do well.
T plus 30 seconds, approaching mach 1.