Today
I work on many projects at the Lunar and Planetary Lab at the University of Arizona,
but right now my main focus is sending cameras to Mars. I designed the Imager for Mars
Pathfinder (IMP), which will land on Mars this summer on July 4! The camera will not just
take one kind of picture. It contains 24 filters that will allow it to examine the
geology, the dusty atmosphere and even the weather on Mars. Some of the pictures of Mars
will even be stereoscopic, or "3-D," because this enables us to calculate the distance to
objects in the picture. I am also working on another Mars camera, the Surface Stereo
Imager (SSI), which will be launched in January 1999.
How I Got Here
While majoring in physics at the University of California at Berkeley in the late 60s,
I became fascinated by optics. Optics is the study of light and its interaction with
matter. Have you ever wondered when you turn on the electricity to a light bulb, where
the light comes from and where does it go when you switch off the light?
I studied the way light is separated into its composite colors and become a
spectroscopist. I got a job in Hawaii helping to build an instrument to study ultraviolet
radiation from the sun. Ultraviolet light does not penetrate to the Earth's surface, so
we flew the instrument on an Aerobee rocket outside the Earth's atmosphere. Each launch
took place in White Sands, New Mexico, and a mission lasted less than 20 minutes. We
would find the broken shell of the spacecraft 50 miles away in a remote area of the New
Mexico desert near the White Sands monument. Then we would recover the special film from
the instrument to obtain our spectral data for future analysis. Although we had high hopes
of learning some new secret about the energy sources powering the structures in the sun's
outer layers, in fact, after many years of effort, little knowledge was gained. These
secrets are just now being discovered, 25 years later, from the SOHO mission now in orbit
monitoring the sun's atmosphere.
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