Institution: | 1.Kislovodsk Mountain Astronomical Station, Central Astronomical Observatory of the Russian Academy of Sciences, Kislovodsk, 357700, Russia ;2.Kalmyk State University, Elista, 358000, Russia ;3.St. Petersburg State University, St. Petersburg, 199034, Russia ;4.Institute of Applied Geophysics, Moscow, 129128, Russia ;5.Institute of Solar-Terrestrial Physics, Siberian Branch of the Russian Academy of Sciences, Irkutsk, 664033, Russia ; |