00739naa#a2200181#i#450# EN\\bibl\103805 20251216213146.2 2072-9502 20250902b2025####ek#y0engy0150####ca RU Development of a route map for monitoring the electromagnetic situation in the Astrakhan region for the radio frequency center of the Southern Federal District of the Russian Federation Journal article Astrakhan Astrakhan State Technical University 2025 8 с. Journal article local Аппаратура и методы радиосвязи. 621.396 Pishchin Oleg Nickolaevich Dattsky Alexandr Andreevich vestnik.astu.ru