Effective diagnostics with ground penetrating radar (GPR) is strongly dependent on the amount and quality of available data as well\r\nas on the efficiency of the adopted imaging procedure. In this frame, the aim of the present work is to investigate the capability of a\r\ntypical GPR system placed at a ground interface to derive three-dimensional (3D) information on the features of buried dielectric\r\ntargets (location, dimension, and shape). The scatterers can have size comparable to the resolution limits and can be placed in\r\nthe shallow subsurface in the antenna near field. Referring to canonical multimonostatic configurations, the forward scattering\r\nproblem is analyzed first, obtaining a variety of synthetic GPR traces and radargrams by means of a customized implementation of\r\nan electromagnetic CAD tool. By employing these numerical data, a full 3D frequency-domain microwave tomographic approach,\r\nspecifically designed for the inversion problem at hand, is applied to tackle the imaging process. The method is tested here by\r\nconsidering various scatterers, with different shapes and dielectric contrasts.Theselected tomographic results illustrate the aptitude\r\nof the proposed approach to recover the fundamental features of the targets even with critical GPR settings.
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