00754naa#a2200205#i#450# EN\\bibl\39952 20260311195815.3 2500-0535 20210630b2021####ek#y0engy0150####ca ENG RU Behavior of electron density in the ionosphere over Norilsk during the period of declining solar activity Journal article Irkutsk Institute of Solar-Terrestrial Physics SB RAS 2021 3 с. Journal article local Геология. Геологические и геофизические науки. 55 ENG Yakovleva Olga Evgenyevna Kushnarenko Galina Petrovna Kuznetsova Galina Mihaylovna ras.editorum.ru