00741naa#a2200205#i#450# EN\INFRA-M\bibl\39953 20241222141404.7 2712-9640 20210630b2021####ek#y0engy0150####ca RUS RU Behavior of electron density in the ionosphere over Norilsk during the period of declining solar activity Journal article Moscow INFRA-M Academic Publishing LLC. 2021 3 с. Journal article local Геология. Геологические и геофизические науки. 55 RUS Yakovleva Olga Evgenyevna Kushnarenko Galina Petrovna Kuznetsova Galina Mihaylovna zh-szf.ru