Analysis of ionospheric parameters based on threshold wavelet filtering (from foF2 data of Paratunka (Russia) and Wakkanai (Japan) stations)

• DOI

In this paper we analyze the critical frequency of the ionospheric layer F2 (foF2) during magnetic storms from 2018 to 2022. The structure of the ionosphere is dynamically changing. It contains local inhomogeneities of different character and intensity. Anomalous changes in the regular course of ionospheric parameters have negative impact on various aspects of life, functioning of spacecrafts and the stable operation of radio communications. The foF2 data were analyzed using the method of adaptive threshold wavelet filtering developed by the authors. The results showed the presence of anomalies of different intensity and duration in foF2 variations during magnetic storms. The comparison of the results from different stations revealed significant dependence of ionospheric dynamics on the parameters of interplanetary medium and the magnetosphere, as well as on local factors. The effects of anomalous increase and anomalous decrease before magnetic storms of different intensities were detected.

Mandrikova, O., Polozov, Y. Analysis of ionospheric parameters based on threshold wavelet filtering (from foF2 data of Paratunka (Russia) and Wakkanai (Japan) stations). In: Solar-Terrestrial Relations and Physics of Earthquake Precursors. STRPEP 2023. Springer Proceedings in Earth and Environmental Sciences. Springer, Cham. 2023, pp. 141-149. Doi: https://doi.org/10.1007/978-3-031-50248-4_15