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5 June 1995 FOPEN-SAR detection by direct use of simple scattering physics
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Foliage penetrating VHF/UHF SAR can image hidden ground vehicles, but numerous false alarms produced by residual tree trunk image spikes strongly impede automatic detection. This paper demonstrates at least 30 dB reduction in tree trunk false alarms through an approach that directly uses target and clutter scattering physics in a matched filter detector. The large improvement results because scattering is measured over wide angles. Yet, because of the long wavelength, few scatterers are involved, and modeling is both simple and robust. The target is modeled by the dihedral formed between its side and the ground, whereas trees are modeled by vertical cylinders. Since input experimental data is nearly complex-Gaussian, the detector is nearly optimal, and its implementation is made computationally efficient by filtering in two steps. Although the matching is demonstrated in terms of angle diversity, frequency, and polarimetry may be included, and the method fits into an efficient overall ATR search.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mark R. Allen, Julie M. Jauregui, and Lawrence E. Hoff "FOPEN-SAR detection by direct use of simple scattering physics", Proc. SPIE 2487, Algorithms for Synthetic Aperture Radar Imagery II, (5 June 1995);


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