00638naa#a2200205#i#450# EN\\bibl\75258 20260315005720.7 2712-9640 20240625b2024####ek#y0engy0150####ca RU HF radio path modeling by waveguide approach Journal article Irkutsk Institute of Solar-Terrestrial Physics SB RAS 2024 9 с. Journal article local Физика. 53 Ponomarchuk Sergey Nikolaevich Kurkin Vladimir Ivanovich Ilyin Nikolay Viktorovich Penzin Maksim Sergeevich iszf.editorum.ru