00943naa#a2200265#i#450# EN\INFRA-M\bibl\39469 20241122003614.5 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 Moscow INFRA-M Academic Publishing LLC. 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 zh-szf.ru