TY JOUR TI Estimating antenna coupling factor for problem of topside ionosphere sounding from space with using chirp signals KW antenna coupling factor KW satellite KW ionosphere sounding KW HF JO Solar-Terrestrial Physics AU Podlesnyi, A.V. AU Naumenko, A.V. AU Cedrik, M.V. PY 2019 IS 5 PB INFRA-M Academic Publishing LLC.