TY JOUR TI Spectral analysis of IAR oscillations to determine the value and variability of the peak electron density NmF2 KW ionospheric Alfvén resonator KW spectral bands KW oscillation harmonics KW electron density maximum KW diurnal variations KW regression analysis JO Solar-Terrestrial Physics AU Potapov, A.S. AU Polyushkina, T.N. AU Guglielmi, A.V. AU Ratovsky, K.G. AU Moskalev, I.S. PY 2023 IS 9 PB INFRA-M Academic Publishing LLC.