In this study, the possibility to describe the signals scattered by various physical objects such as underlying surfaces of land and sea, the segments of "clear sky," and processes of various physical natures, such as fluctuations of the refractive index of the troposphere and electromagnetic and acoustic radiation of a lithospheric nature, by enclosed semi-Markov processes is investigated. This approach makes it possible to construct statistic models for a broad class of signals and processes. In some cases, statistics based on atomic functions and WA systems of the Kravchenko–Rvachev functions show the best results.
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