I work in the OSS and PODPS Unified System (OPUS). The OSS acronym stands for the
Observation Support System and PODPS is the Post Observation Data Processing System. OSS
and PODPS were combined into one system late last year. My job was (and still is to some
point) to help in the merger of these two systems. A good part of this involved procedure
writing and computer programing. I also manage our local set of homegrown software that
we used to make our day to day work easier. In addition, I help manage the software
package, called IRAF (Image Reduction and Analysis Facility), that we use to calibrate
and assess HST science data.
On rare occasions I get to do some real-time commanding. This is done to support what
we call a mode one target acquisition, which is needed under certain circumstances.
During a mode one target acquisition, HST takes a picture of an astronomical target and
sends it down to us here in OPUS within seconds after it leaves HST. Once the picture is
displayed on a computer screen, we find the target and calculate how far we need to nudge
HST to center the target in an aperture. Then at a predetermined time, we send a command
to HST to move so that the target is centered.
Another type of real-time commanding that we do is to move or tilt the mirrors in the
COSTAR instrument. Remember that COSTAR is the instrument that has the little mirrors
that correct HST's primary mirror's aberration for 3 of HST's 5 science instruments. OSS
(now OPUS) did a lot of this type of commanding shortly after the first servicing mission
to HST, but now it is rarely needed.
I pretty much knew by the time that I was in the 5th grade that I wanted to have a
career in astronomy. Throughout school, I took all of the math and science courses I
could. After high school, I went to Indiana University and obtained a Bachelor of Science
degree in Astrophysics and Astronomy. Shortly after obtaining my degree, one of my
professor's (Dr. Hollis Johnson) recommended me for my current job.
I have a strong background in observational astronomy, but I would have been more
prepared for my job if I had more computer experience. I did not even start to play with
computers until I was a sophomore in college. Certainly, you must be comfortable with
working with computers in my line of work.
Certainly, the opportunity to actually command HST is one of the best things my job
has to offer. Just as fun is that I am able to see many of the HST images for the first
time. On several occasions, I remember seeing images that you just know will eventually
show up in press.
The worst thing about my job is that the location of STScI forces me to live near a
large city. I have often wished the Institute would have been built somewhere out in the
middle of nowhere. Since I do live near a city, light pollution has taken away much of
the night sky that I knew as a boy. I was lucky to have grown up where the stars were the
feature attraction every clear moonless night.
Jackie, Alex, Mike, and Forrest
Long before landing the job here with HST, I was an amateur astronomer (and still am)
since age 6. As far as I can remember, I have always been fascinated with the night sky.
One of the things that intrigued me most while growing up on a farm in north-central
Indiana (near the small town of Grass Creek), was this little luminous patch of sky that
was visible on spring evenings. It was no where near the Milky Way, so that was not the
answer. When I was 11, my dad purchased a small 40mm refractor telescope which he let me
use on occasion. With it I was able to look at this little patch of light. It turned out
that the patch was a cluster of stars called the Praesepe (also known as the Beehive
Cluster) in the constellation Cancer, the Crab.
By the time I was 12, I had most of the patterns of the northern hemisphere
constellations memorized. I would often go out and just look at the stars with just my
naked eye. Some of the more memorable events that kept me interested in astronomy were:
Comet West (March 1976)
several displays of northern lights
the views of the Moon, Venus, Jupiter, and Saturn through that little 40mm refractor
I have started to share my love of the night sky with my two sons Mike (age 12) and Alex
(age 6). Recently, I completed construction of a 6 inch reflecting telescope for them to
use as they wish. We can't wait to make a country run and use it to look at Comet
Hyakutake, which will hopefully be spectacular this spring.