Integral equation method for the attenuation factor calculation with consideration of the earth's surface impedance.

This paper presents a new integral equation to calculate the attenuation factor near the Earth's surface. An expression for the attenuation function computation at arbitrary heights is derived and the distance dependences of the attenuation factor are presented. The correspondence of the numerical results with analytical calculations for the planar and spherical surface is shown. The results for the real terrain profile are given.