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Simplified model for EM inverse scattering by longitudinal subterranean inhomogeneities exploiting the dawn/dusk ionospheric ridge

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2 Author(s)
C. A. Valagiannopoulos ; School of Electrical Engineering, Aalto University, Otakaari 5A, FIN-02105 Espoo, Finland ; N. K. Uzunoglu

It is well known that the ionospheric height varies substantially during the transition from day to night and vice versa; the same happens for the field on both sides of the discontinuity. The moving ionospheric ridge is employed to develop a method treating the inverse scattering problem for a buried inhomogeneous dielectric strip, based on accurate ground field measurements. The incident field and Green's function are determined with the use of spectral integrals and the implementation of a mode-matching technique. The effect of a subterranean obstacle is evaluated via scattering integral discretisation, which leads to a guess about its permittivity profile. The prediction error of the proposed method is represented as a function of the problem parameters in various graphs and the technique's robustness against inaccurate guesses has been tested.

Published in:

IET Microwaves, Antennas & Propagation  (Volume:5 ,  Issue: 11 )