A high speed adaptive methodology for calculating UHF propagation loss over terrain

A fast new methodology for solving the matrix equation that arises from an integral equation description of UHF propagation over terrain is presented. The method combines the fast far field approximation with the Green´s function perturbation method to produce a fast solution technique with a strong physical basis. Results of numerical experiments are presented and compare favourably with both published measured data and slower more exact reference solutions. The effect of small scale surface roughness is also discussed