Electromagnetic modeling of buried objects

Check F. Lee

doi:10.1117/12.179936

22 July 1994 Electromagnetic modeling of buried objects

Check F. Lee

Proceedings Volume 2217, Aerial Surveillance Sensing Including Obscured and Underground Object Detection; (1994) https://doi.org/10.1117/12.179936
Event: SPIE's International Symposium on Optical Engineering and Photonics in Aerospace Sensing, 1994, Orlando, FL, United States

Abstract

In this paper, radar cross section (RCS) models of buried dipoles, surface steel pipe, and buried steel pipes are dicussed. In all these models, the ground is assumed to be a uniform half space. The calculated results for the buried dipoles and the surface steel pipe compare favorably with those measured in the 1993 Yuma ground penetration radar (GPR) experiment. For the buried dipoles, a first-order RCS model is developed. In this model, a solution for an infinitely long conducting cylinder, together with a mirror image approximation (which accounts for the coupling between the dipole and the ground-air interface) is used to calculate the dipole RCS. This RCS model of the buried dipoles explains the observed loss of dipole RCS. For the surface steel pipe, a geometrical optics model, which includes the multipath interaction, is developed. This model explains the observed multipath gain/loss. For the buried steel pipes, a zero order physical optics model is developed. Also discussed is desert radar clutter statistics as a function of depression angle. Preliminary analysis, based on samples of Yuma desert suface profiles, indicates that simple rough-surface models cannot explain the observed average backscatter from desert clutter.

Citation Download Citation

Check F. Lee "Electromagnetic modeling of buried objects", Proc. SPIE 2217, Aerial Surveillance Sensing Including Obscured and Underground Object Detection, (22 July 1994); https://doi.org/10.1117/12.179936

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