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, Dragana Carevic, Maurice Craig, Maurice Craig, Ian J. Chant, 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); doi: 10.1117/12.280886; https://doi.org/10.1117/12.280886

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