00662naa#a2200217#i#450# EN\\bibl\75259 20260309113927.1 2500-0535 20240625b2024####ek#y0engy0150####ca ENG RU HF radio path modeling by waveguide approach Journal article Irkutsk Institute of Solar-Terrestrial Physics SB RAS 2024 8 с. Journal article local Физика. 53 ENG Ponomarchuk Sergey Nikolaevich Kurkin Vladimir Ivanovich Ilyin Nikolay Viktorovich Penzin Maksim Sergeevich ras.editorum.ru