4 September 1998 Extraction of complex resonances associated with buried targets
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Early time returns affect the estimation of complex natural resonance (CNR) frequencies associated with a target. This is especially true when there is a small separation between the early time returns and the late time response of the target and the CNRs are low Q mechanisms. A good example of this scenario is antipersonnel mines. In this situation, it helps to remove the early time returns from the total scattered field. A new technique to accomplish this is presented here. Using some numerical data and some experimental data, it is demonstrated that this technique is very effective in removing the early time returns. The modified scattered field data then yields better estimates of CNR frequencies.
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Inder Jiti Gupta, Inder Jiti Gupta, Andria van der Merwe, Andria van der Merwe, Chi-Chih Chen, Chi-Chih Chen, } "Extraction of complex resonances associated with buried targets", Proc. SPIE 3392, Detection and Remediation Technologies for Mines and Minelike Targets III, (4 September 1998); doi: 10.1117/12.324149; https://doi.org/10.1117/12.324149

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