TY CONF TI LONGITUDINAL INHOMOGENEITIES OF THE IONOSPHERE ELECTRON CONCENTRATION OF THE EURASIA MIDDLE LATITUDES AND THEIR RELATION TO THERMOSPHERIC GAS DISTURBANCES DURING GEOMAGNETIC STORMS UNDER EQUINOX CONDITIONS KW ionosphere KW electron concentration KW magnetic storms JO The XXXI International Symposium "Atmospheric and Ocean Optics. Atmospheric Physics" AU Chernigovskaya, M.A. AU Khabituev, D.S. AU Medvedeva, I.V. PY 2025 PB V.E. Zuev Institute of Atmospheric Optics, Siberian Branch of the Russian Academy of Sciences