TY JOUR TI Ionospheric effects of two solar flares in the maximum of solar cycle 23 and in the minimum of solar cycle 24 KW ionosphere KW solar flares KW navigation satellite systems KW radio translucence method KW electron content JO Solar-Terrestrial Physics AU Smirnov, V.M. AU Smirnova, E.V. PY 2019 IS 5 PB INFRA-M Academic Publishing LLC.