Mathematical modeling of electromagnetic wave scattering by the complicated terrain relief

A calculation method for plane electromagnetic wave scattering by the complex terrain relief is proposed. The relief model is constructed on the basis of digital maps of the terrain using the finite element method. An approximated surface is divided by triangular elements. The scattering problem is solved for every relief element (physical optics approach). The resulting scattered field is calculated by adding the fields scattered by the separate relief elements. An example of calculation results for the field scattered by the portion of natural ground surface is presented.