E.V. Naidenov - Post-graduate Student, Smolensk Branch of the National Research University Moscow Power Engineering Institute. E-mail: nzettez@gmail.com M.V. Zhendarev - Associate Professor, Military Academy of the Armed Forces VPVO named after Marshal A.M. Vasilevski (Smolensk). E-mail: russian2112@yandex.ru I.V. Yakimenko - Associate Professor, Smolensk Branch of the National Research University Moscow Power Engineering Institute. E-mail: jakigor@rambler.ru