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22 July 1997 Modeling GPR echoes from land mines using linear combinations of exponentially damped sinusoids
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Ultra-wideband returns from surface-scattered and buried land mines give distinctive echoes that depend on the target type and soil environment. These echoes remain relatively stable for land mines with non-metallic casings but vary with the soil environment for land mines with metallic casings. This fact indicates that the signature resulting from the non-metallic-cased land mine is due to internal structure, whereas the signature of the metallic-cased target is due to interaction of the illuminating pulse with the metal case and the surrounding medium. The shape of these echoes can be described by a series of damped sinusoids. Certain parameters of the functions are believed to be stable for the same target in a variety of environments. Thus the echo can theoretically be used to identify targets with non-metallic casings by determining the position of the fixed poles that describe the exponential dampled sinusoids associated with a particular target type. This paper examines extraction of these poles, by the Prony method, for different types of non-metallic land mines and land-mine-like targets.
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Dragana Carevic, Maurice Craig, and Ian J. Chant "Modeling GPR echoes from land mines using linear combinations of exponentially damped sinusoids", Proc. SPIE 3079, Detection and Remediation Technologies for Mines and Minelike Targets II, (22 July 1997);


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