00624naa#a2200205#i#450# EN\INFRA-M\bibl\75258 20241121190518.4 2712-9640 20240625b2024####ek#y0engy0150####ca RU HF radio path modeling by waveguide approach Journal article Moscow INFRA-M Academic Publishing LLC. 2024 9 с. Journal article local Физика. 53 Ponomarchuk Sergey Nikolaevich Kurkin Vladimir Ivanovich Ilyin Nikolay Viktorovich Penzin Maksim Sergeevich zh-szf.ru