Affiliation: | 1.Immanuel Kant Baltic Federal University, 236041, Kaliningrad, Russia ;2.Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation (Kaliningrad Branch), Russian Academy of Sciences, 236016, Kaliningrad, Russia ;3.Obukhov Institute of Atmospheric Physics, Russian Academy of Science, 119017, Moscow, Russia ; |