NDT, Volume 3, Issue 4
2025 December - 6 articles
Cover Story: Migration is commonly used to focus the scattered energy within a Ground Penetrating Radar (GPR) section, using an electromagnetic (EM) velocity model. The accuracy and efficiency of such a velocity model are not guaranteed, when dealing with zero-offset (ZO) data. With the aid of an Artificial Intelligence (AI) algorithm, we generate a diffraction velocity model, which is further used to assign 2D weights for weighted multipath summation. The proposed multipath summation method effectively focuses the GPR diffractions even in the presence of moderate to high dielectric heterogeneity. We present its application on marble assessment GPR data for imaging cracks and discontinuities in the subsurface structure. View this paper
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