Spectra of tides and planetary waves from the data of ionosonde measurements near Saint Petersburg

Nikolai M. Gavrilov; Andrey V. Koval

doi:10.1117/12.2603285

15 December 2021 Spectra of tides and planetary waves from the data of ionosonde measurements near Saint Petersburg

Proceedings Volume 11916, 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics; 119167R (2021) https://doi.org/10.1117/12.2603285
Event: 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2021, Moscow, Russian Federation

Abstract

Spectra of the critical frequency of the F2 ionospheric layer in the range of periods 0.5 – 40 days are analyzed using the data of measurements with the ionosonde DPS-4 at the Peterhof scientific station of Saint Petersburg State University (60°N, 30°E). Spectral analysis is executed using the Lomb –Skargle method for 60-day running intervals. Spectra show maxima at periods of 1 day and 0.5 day corresponding to diurnal and semidiurnal changes, and maxima in the range of periods 2 – 40 days. These waves have frequently maximum amplitudes in spring and summer, which is opposite to the PW amplitudes observed in the lower and middle atmosphere. This may be caused by different mechanisms including possible PW propagation from the middle atmosphere of the winter hemisphere to the summer thermosphere along the waveguides crossing the equator at altitudes above 60 km.

Citation Download Citation

Nikolai M. Gavrilov and Andrey V. Koval "Spectra of tides and planetary waves from the data of ionosonde measurements near Saint Petersburg", Proc. SPIE 11916, 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 119167R (15 December 2021); https://doi.org/10.1117/12.2603285

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