Dielectric oblate spheroidal model of buried landmines

Scott F. Gruber; John D. Norgard

doi:10.1117/12.445460

18 October 2001 Dielectric oblate spheroidal model of buried landmines

Scott F. Gruber, John D. Norgard

Proceedings Volume 4394, Detection and Remediation Technologies for Mines and Minelike Targets VI; (2001) https://doi.org/10.1117/12.445460
Event: Aerospace/Defense Sensing, Simulation, and Controls, 2001, Orlando, FL, United States

Abstract

To approximate buried miens with electrical characteristics similar to their surroundings, an analytical model is chosen over a more computationally time consuming numerical model. A curved volume best approximates some mine types and an analytical model of a buried sphere using the Born Approximation has been developed. When modeling a mine, the sphere offers only one degree of freedom, its radius. The oblate spheroid is a more versatile model since it provides two degrees of freedom: major axis and eccentricity. The analytical solution for the current induced into a dielectric scatterer is developed for the oblate spheroid in the spectral domain and its resulting scattered electric field is determined by solving for all transverse components and transforming the result to the spatial domain via a 2D FFT. Favorable results are achieved by comparing this oblate spheroidal modeled Moment Method results derived by partitioning three different land mines. It is also shown to be superior to the sphere model. A method of inertia is also presented.

Citation Download Citation

Scott F. Gruber and John D. Norgard "Dielectric oblate spheroidal model of buried landmines", Proc. SPIE 4394, Detection and Remediation Technologies for Mines and Minelike Targets VI, (18 October 2001); https://doi.org/10.1117/12.445460

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