3-D short pulse scattering by moderately rough dielectric interfaces via quasi-ray Gaussian beams

In the context of ground penetrating radar illumination of moderately rough interfaces, we have recently developed a number of physics-based, computationally efficient, forward scattering models for both time-harmonic and pulsed excitations, using Gabor-based narrow-waisted Gaussian beam algorithms. These forward solvers, so far restricted to two-dimensional configurations, have subsequently been incorporated into adaptive subsurface sensing techniques aimed at detecting, localizing and classifying shallow-buried low-contrast targets. In this paper, we extend the 2D short-pulse physical-optics (PO)-based forward scattering model to the more challenging and realistic case of 3D (vector) configurations.