Affiliation: | (1) Nizhni Novgorod State Pedagogical University, Nizhni Novgorod, Russia;(2) Radiophysical Research Institute, Bol’shaya Pecherskaya ul. 25, GSP-51, Nizhni Novgorod, 603600, Russia;(3) Institute of Terrestrial Magnetism, Ionosphere, and Radiowave Propagation, Russian Academy of Sciences, Troitsk, Moscow oblast, 142190, Russia |