TY JOUR TI Ionospheric disturbances over Eastern Siberia during April 12–15, 2016 geomagnetic storms KW ionosphere KW GNSS KW incoherent scatter radar KW geomagnetic storms KW ionospheric disturbances JO Solar-Terrestrial Physics AU Rubtsov, A.V. AU Maletckii, B.M. AU Danilchuk, E.I. AU Smotrova, E.E. AU Shelkov, A.D. AU Yasyukevich, A.S. PY 2020 IS 6 PB INFRA-M Academic Publishing LLC.