Detection of a scatter target over a randomly rough surface by using the angular correlation function in a finite-element approach

It is known that the angular correlation function of scattered fields from a randomly rough surface has a conspicuous enhancement on the memory line, and becomes much smaller away from the line. The finite-element method is e mployed to solve the problem of scattering from a scatter target situated o ver a randomly rough surface. Numerical results show that the width of the angular correlation function becomes broadened owing to the presence of the target. It can be used to detect the presence of a target placed over the rough surface.