00825naa#a2200229#i#450# EN\INFRA-M\bibl\20544 20241121200525.4 2712-9640 20180629b2018####ek#y0engy0150####ca RUS RU Diagnostics of HF radio channel: based on data from backscatter ionospheric sounding by continuous chirp signal Journal article Moscow INFRA-M Academic Publishing LLC. 2018 7 с. Journal article local Инженерное дело. Техника в целом. Транспорт. 62 RUS Ponomarchuk Sergey Nikolaevich Grozov Viktor Petrovich Kotovich Galina Vasilyevna Kurkin Vladimir Ivanovich Penzin Maksim Sergeevich zh-szf.ru