%0 Journal Article %T Seasonal variations in daily maximum of electron density in the F2 ionospheric layer depending on solar activity according to the Tomsk ionospheric station data %A Kolesnik, S.A. %A Borisevich, A.N. %K solar activity, F2 layer, regression models %J Solar-Terrestrial Physics %D 2026 %N 12 %P 6 %I INFRA-M Academic Publishing LLC.