TY JOUR TI Analyzing existing applied models of the ionosphere for calculating radio wave propagation and possibility of their use for radar systems. I. Classification of applied models and the main requirements imposed on them for radar aids KW radar aids KW ionospheric models JO Solar-Terrestrial Physics AU Aksenov, O.J. AU Kozlov, S.I. AU Lyakhov, A.N. AU Trekin, V.V. AU Perunov, Y.M. AU Yakubovsky, S.V. PY 2020 IS 6 PB INFRA-M Academic Publishing LLC.