19 July 2000 Detection of unexploded ordnance using physical optics simulated images as templates
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We present results of an unexploded ordnance (UXO) detection algorithm based on template matching in ultra-wideband (130 MHz to 1.2 GHz) synthetic aperture radar (SAR) data. We compute scattered fields of UXOs in different orientations, both on the surface and buried at different depths, using a physical optics (PO) approximation for perfectly conducting targets in a half space via the half-space Green's function. The PO code that we developed computes the scattered fields in a lossy and dispersive material. This permits simulation of targets in real soil. The frequency-domain scattered fields are transformed into time-domain. SAR images of the UXOs at different aspect angles are generated by a standard backprojection technique, with the same resolution as the ground-penetrating ultra-wideband SAR. These SAR images form the templates for detection of the UXOs.
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Thyagaraju Damarla, Thyagaraju Damarla, Anders J. Sullivan, Anders J. Sullivan, Karl A. Kappra, Karl A. Kappra, Jeffrey Sichina, Jeffrey Sichina, David C. Wong, David C. Wong, } "Detection of unexploded ordnance using physical optics simulated images as templates", Proc. SPIE 4033, Radar Sensor Technology V, (19 July 2000); doi: 10.1117/12.391856; https://doi.org/10.1117/12.391856

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