Electromagnetic waves over stratified media in natural conditions

Experimental data of the radio wave propagation over high inductive structure “ice-salt water” in the decameter range of a field radiated by vertical dipole on a distance of up to 1.2 km are considered. It is shown that the surface electromagnetic waves (SEW) were attenuated less than the “ground” ray. An analysis of the field of radiation from the vertical dipole reveals the presence of a wave with the amplitude decaying with the distance R approximately as 1/R^1/2, which corresponds to the SEW divergence. The absolute values of the radiation attenuation function |W| are significantly greater than unity and reach |W|=2, which also corresponds to the SEW. Experimental data on the SEW damping agree with the results of numerical calculations of the electromagnetic field in the system under consideration.