The engine control is enabled.
Liquid oxygen tanking now at 99%.
And T-minus 45 seconds
liquid oxygen now reported at 100%.
Topping is complete.
And coming up now on 30 seconds,
T-minus 30 seconds and counting
T-minus 20 seconds and counting.
Battery systems are now reporting go for launch.
T-minus 15. Locks reported go.
11. ten. nine. eight. seven. six.
five, four, three, two, we have
main engine start and liftoff.
Liftoff of Delta 189
and the Cosmic Observation Background Explorer.
And the vehicle has cleared the tower.
Vehicle now moving down range.
Roll program is in, pitch program is in
Roll program is in. Vehicle now moving downrange.
All events continuing
to look good on the Delta vehicle.
Coming up now on one minute into flight, solid motors continue to burn well.
Vehicle now 8.2 miles high, 5.3 miles downrange.
Solid motor burn out of all six solids. Other three solids have ignited now.
Velocity 1478 miles per hour.
Engines look good.
The Delta vehicle continuing to perform nominally.
Altitude now
solid rocket boosters have been jettisoned on time.
All events continue to look normal.
Attitude disturbances very low level, very good flight of the vehicle going.
Altitude 14.9 miles, 13.9
miles down range, 2074 miles per hour.
Still a very good flight of Delta COBE.
Coming up now on 2 minutes into the flight
Very smooth first stage performance
right now, second set of solids have now burned out.
Standing by for jettison,
Solid motor jettison,
and the other three have been jettisoned.
So the delta now flying on its first stage.
Guidance system reported
supplying good data
Altitude, now
29.9 miles. 49.7 miles
downrange, velocity 4598 miles per hour.
Little bit of
oscillations reported by the vehicle called Pogo Effect,
however, this is not significant.
Verniers still burning good,
guidance looks good.
We don't see anything amiss here in the data.
We have a very good flight going here.
Very little to report here;
our data all looks very satisfactory.
The first stage continues to burn very well.