00956naa#a2200265#i#450# EN\\bibl\39469 20260314004919.6 2500-0535 20200922b2020####ek#y0engy0150####ca ENG RU Amplitude variations of the reflected signal during vertical sounding of the ionosphere at middle latitudes Journal article Irkutsk Institute of Solar-Terrestrial Physics SB RAS 2020 8 с. Journal article local Геология. Геологические и геофизические науки. 55 ENG Yusupov Kamil Maratovich Mathews John D. Maruyama Takashi Akchurin Adel Dzhavidovich Tolstikov Maksim Valeryevich Sherstyukov Oleg Nikolaevich Filippova Elena Alekseevna Safiullin Anvar Subanovich ras.editorum.ru