TY CONF TI REGRESSION MODELS ANALYSIS OF THE DEPENDENCES ELECTRON CONCENTRATION OF THE F2 LAYER IONOSPHERE MAXIMUM ON SOLAR ACTIVITY AND YEARLY SEASONS BASED ON THE TOMSK IONOSPHERIC STATION DATA KW ionosphere KW model KW solar activity JO The XXXI International Symposium "Atmospheric and Ocean Optics. Atmospheric Physics" AU Borisevich, A.N. AU Kolesnik, S.A. PY 2025 PB V.E. Zuev Institute of Atmospheric Optics, Siberian Branch of the Russian Academy of Sciences