Modeling targets in a forest at VHF and UHF frequencies

Anders J. Sullivan

doi:10.1117/12.488290

30 July 2002 Modeling targets in a forest at VHF and UHF frequencies

Anders J. Sullivan

Proceedings Volume 4744, Radar Sensor Technology and Data Visualization; (2002) https://doi.org/10.1117/12.488290
Event: AeroSense 2002, 2002, Orlando, FL, United States

Abstract

The utility of low frequency synthetic aperture radar (SAR) for detecting foliage-concealed targets is examined. A forest simulation has been created using a large set of randomly placed and oriented tree models over a lossy dielectric half-space. Given the size of the targets and the wideband frequencies of interest, it is shown that the problem size quickly grows beyond the capabilities of even supercomputers. As a result, an approximate linear superposition technique is developed to model the response from a large number of targets (T-72 tank plus forest model). Results in the SAR image domain show that the clutter response produced by the collection of trees is higher than the response from the T-72 in all cases except when the tank orientation is broadside to the radar aperture. Examination of the backscattered signature of the T-72 shows that there is a direct correlation between the target response and the physical layout of the vehicle. This connection between shape and response holds promise for future exploitation in ATR algorithm development.

Citation Download Citation

Anders J. Sullivan "Modeling targets in a forest at VHF and UHF frequencies", Proc. SPIE 4744, Radar Sensor Technology and Data Visualization, (30 July 2002); https://doi.org/10.1117/12.488290

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