00826naa#a2200229#i#450# EN\INFRA-M\bibl\22243 20241123160538.6 2500-0535 20180629b2018####ek#y0engy0150####ca ENG 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 6 с. Journal article local Инженерное дело. Техника в целом. Транспорт. 62 ENG Ponomarchuk Sergey Nikolaevich Grozov Viktor Petrovich Kotovich Galina Vasilyevna Kurkin Vladimir Ivanovich Penzin Maksim Sergeevich zh-szf.ru