George Diller/GOES-O Launch Commentator: This is Delta Launch Control at T-115 minutes, 47 seconds and counting.
The countdown for the launch of the GOES-O weather satellite for NASA and NOAA is now in its final phase this afternoon.
Right now, we're in the middle of fueling the second stage with liquid hydrogen and liquid oxygen.
First-stage fueling operations are complete.
Our fueling should be complete in about 45 minutes, at 4:45 this afternoon.
And that will finish the loading of the rocket when we complete the second stage, or the upper stage.
Activities at Launch Complex 37 began early this morning when the mobile service tower,
or the gantry, was pulled away from the Delta IV rocket.
That procedure was kicked off at about 6:14 a.m. and finished shortly after 7:30 this morning.
The launch team manned their stations for the terminal countdown at about 12:15 this
afternoon at the Delta Operations Center and Mission Director's Center
in preparation for the start of loading the liquid hydrogen and liquid oxygen propellants aboard the rocket.
Fueling began with the liquid oxygen into the first stage at 1:34 p.m. and was finished at 2:32 p.m.
And then the liquid-hydrogen fueling began at 2:04 p.m. and was finished at 2:50 p.m. on the first stage, or core booster stage.
Loading of the upper stage then began with the liquid oxygen at 2:45 p.m., followed by the start of liquid hydrogen
30 minutes later at 3:15 p.m. -- and that's what we'll be wrapping up here in another 45 minutes or so.
Upcoming in the launch countdown, some of the activities we'll also hear at that point,
will be the test of the range safety systems aboard the rocket,
and later we'll hear and see the gimbal slew checks -- these are the steering checks of
the main engines aboard each of the two stages of the Delta IV.
At T-113 minutes, 30 seconds and counting, this is Delta Launch Control.