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The analysis of scattering of objects buried below a random rough surface is of practical interest. In reality, the random rough surface may be of an extensive periodic structure. To deal with this more realistic situation, this paper presents a Monte-Carlo MPSTD numerical technique developed for investigating the scattering of a cylinder buried below a random periodic rough surface. The computation model is formulated in two steps. In the flrst step, only the random rough surface is considered and the periodic boundary condition (PBC) is enforced at the two ends of a period of the rough surface. Then, in the second step, a cylinder is placed below the random rough surface and the interaction between the buried cylinder and the rough surface is taken into account. In each of the two steps, the flelds are computed employing the MPSTD algorithm developed in the authors' previous work. Sample numerical results are presented and validated.

A MONTE-CARLO MPSTD ANALYSIS OF SCATTERING FROM CYLINDERS BURIED BELOW A RANDOM PERIODIC ROUGH SURFACE