%0 Journal Article %T Amplitude variations of the reflected signal during vertical sounding of the ionosphere at middle latitudes %A Yusupov, K.M. %A Mathews, J.D. %A Maruyama, T.. %A Akchurin, A.D. %A Tolstikov, M.V. %A Sherstyukov, O.N. %A Filippova, E.A. %A Safiullin, A.S. %K ionosonde, ionogram, ionosphere, magnetoionic modes, A-maps %J Solnechno-Zemnaya Fizika %D 2020 %N 6 %P 10 %I INFRA-M Academic Publishing LLC.