Ground penetrating radar is often used for the detection of landmines but is limited by low signal-to-clutter ratios. We built and tested a forward-looking polarimetric GPR which measures the scattering matrix of targets and background. From the scattering matrix we calculated the polarizability angle, relative phase angle, and target magnitude. Measurements were made on dry sand without a target, sand with a buried polystyrene cylinder, and sand with a buried styrofoam cylinder. As frequency was swept the relative phase angle changed more rapidly when either cylinder was present compared to the sand alone. The relative phase may be a useful feature for detecting plastic objects and voids in sand
Biography
Cornell S.L. Chun, Ph.D., Physics, Princeton University; B.A. with Honors, Physics, Swarthmore College. Founder of Physics Innovations Inc. He has worked in signal processing and electronic materials, devices, and circuits. At Sperry Corp., he fabricating GaAs integrated circuits and photodetectors and developed processes for refractory metal superconductive integrated circuits. At Argonne National Laboratory, Dr. Chun researched thin films of refractory and magnetic materials. At McDonnell Douglas Corp., he developed algorithms for target discrimination using infrared focal plane arrays. He was the Principal Investigator in a NASA SBIR Phase II contract to develop a polarization-sensitive, thermal imaging camera head.
Sponsors
Sponsored by IEEE Aerospace and Electronics Systems Society
Directions
The meeting will be held in the Conference Room 1B at the Lockheed Martin Corporation, 3333 Polot Knob Road, in Eagan
