Semianalytic mode matching techniques for detecting nonmetallic mines buried in realistic soils

Ann W. Morgenthaler; Carey M. Rappaport

doi:10.1117/12.396200

22 August 2000 Semianalytic mode matching techniques for detecting nonmetallic mines buried in realistic soils

Ann W. Morgenthaler, Carey M. Rappaport

Proceedings Volume 4038, Detection and Remediation Technologies for Mines and Minelike Targets V; (2000) https://doi.org/10.1117/12.396200
Event: AeroSense 2000, 2000, Orlando, FL, United States

Abstract

The Ultra-Wideband detection of plastic land mines buried in lossy, dielectric soils is simulated design a new semi- analytic mode matching (SAMM) algorithm. Here, we apply SAMM to the 3D canonical problem of finding the nonspecular reflection of an obliquely-incident plane wave ona lossy dielectric half-space containing a small, shallowly-varying convex-shaped mines buried under modestly rough ground. In the SAMM algorithm, the frequency-dependent scattered fields are constructed form moderately rough ground. In the SAMM algorithm, the frequency-dependent scattered fields are constructed form moderately low-order modal superpositions of spherical waves, each satisfying the Helmholtz equation in its respective material. By least squares fitting, mode coefficients are found which optimally match all boundary conditions at designated points along the boundary surfaces. Spherical wave expansions are chosen at multiple coordinate centers so that small numbers of modes are needed to given convergent results.

Citation Download Citation

Ann W. Morgenthaler and Carey M. Rappaport "Semianalytic mode matching techniques for detecting nonmetallic mines buried in realistic soils", Proc. SPIE 4038, Detection and Remediation Technologies for Mines and Minelike Targets V, (22 August 2000); https://doi.org/10.1117/12.396200

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