Abstract
Quite fruitful studies of over-the-horizon radio wave propagation have been conducted since the 1940s. Nevertheless, because of the complexity of processes occurring in the atmosphere, solution of a basic problem remains relevant and of practical import determination of the relationship between signal characteristics and tropospheric structure. Studies of this phenomenon have generated an enormous amount of experimental material (see, for example, [1-6]),which has served as a basis for developing tropospheric communications links. It follows from the experimental data that significant variations in mean levels and statistical characteristics of signals exist in various geographic regions at different seasons. This presents definite difficulties to systematization of results and their analysis, and to development of effective and reliable methods for estimating signal levels and statistical characteristics for communications links, radar, and radio navigation, and for determination of electromagnetic compatibility of radio installations. Thus, together with continuing experiments it is desirable to develop theoretical studies of propagation mechanisms, since collection of statistical measurements in various regions and seasons requires large material expenditures.
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