Professor Hale Bradt, MIT
All I can say is that the launch was incredibly impressive given my
knowledge of the many technical systems that had to work perfectly:
first stage, firing and jettisoning of 6 boosters, firing and jettison
of 3 more air-lit boosters, proper orientation of the second stage
with the vernier engines of the first stage, separation, second stage
firing, and shutdown - and of course the guidance systems through all of this. But that was not all: an hour later, the reorientation and
second burn had to go perfectly, followed by another reorientation,
separation of the spacecraft, and then deployment of the spacecraft
solar panels and high-gain antennas. After all the disappointments,
technical issues, delays and many launch attempts, I was just not
prepared for essentially unadulterated good news, but it happened!
I was in the control center listening to the circuits and watching the
videos. I did not try to go outside to see the real thing, preferring
to hear all the voice circuits and also the close-ups on the video
monitors. At ignition, I watched the close-up of the base of the rocket
and saw the flames from the main engines and watched to see the
solid ignitions. I did not see it as the flash apparently overloaded the
cameras momentarily, and after that the view was obscured by
smoke. I then took to watching the bird on another monitor; it was
already beyond the tower. One could see the smoke from all 6 solids,
and it was moving out like blazes. I looked at the little white nipple
on the front of this 12-story rocket and realized that our entire
spacecraft, so lovingly built and nurtured, was inside there getting
the ride of its life. I knew a whole lot was riding on these moments.
After one minute, the first 6 solid boosters were jettisoned, and this
was clearly visible in the telescopic view; the boosters were the long
white things in the image. The plumes from the second set of 3
boosters were as impressive as the first six, and their jettisoning at
the end of two minutes was clearly visible also, but here the bright
hot spots of their exhausts was most apparent. I did not follow the
image to see if I could see the second stage ignition. My attention
was alternately on the image, on the expected times of events (on
another monitor), and/or the audio.
I found the audio to be very exciting. The McDonnell Douglas person
calling out the performance at all stages with the words "nominal
performance" or some such during each stage was very very
reassuring. Hearing the audio from the SOC/MOC at GSFC that our
spacecraft broadcasting had been picked up by TDRSS was another
special moment. The continuing updating by Mike Bay (at GSFC) of
the status of the gyro readouts was much appreciated. Here was the
spacecraft telling us how the 2nd stage rocket was performing. At
this time, even before separation, it was like there were two heads.
The MacD. person telling us of the performance of the 2nd stage and
Mike telling us the perspective of the spacecraft. Then, after
separation, it was like two worlds. The second stage still had
numerous maneuvers and/or burns to get out of the way of the
spacecraft and to expend its fuel while the spacecraft was busy with
its own concerns (deployments, etc.) It was truly a birth process.
The spacecraft was on its completely on its own in this world of
extreme temperatures and no atmosphere. Would it succeed in its
appointed tasks; it appears that indeed it will!
I might add that, shortly after launch (30 sec?), I could hear the
roar of the engines through the walls of the building I was in. At the
same time I was watching the video of the rising rocket - very
impressive. I was probably 3 miles from the launch pad (maybe
more).
All of this, of course, was possible and successful because of heroic
efforts by a large number of dedicated people including the
McDonnell Douglas team, the Kennedy Space Center and Cape
Canaveral Air Force Station personnel, the numerous teams at
Goddard Space Flight Center, the science teams at UCSD, GSFC, and
MIT, and the many, many vendors of flight worthy hardware that
was provided to these groups. I came out of the control center into
the bright Florida sunlight very very grateful to hundreds of people,
many of whom I didn't even know. I trust the science from XTE will
be worthy of their great efforts.