Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 38, issue 5
Articles | Volume 38, issue 5
https://doi.org/10.5194/angeo-38-953-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-38-953-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 38, issue 5
Regular paper
 | 
04 Sep 2020
Regular paper |  | 04 Sep 2020

Semiannual variation of Pc5 ultra-low frequency (ULF) waves and relativistic electrons over two solar cycles of observations: comparison with predictions of the classical hypotheses

Facundo L. Poblet, Francisco Azpilicueta, and Hing-Lan Lam

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Short summary
High-energy electrons in the magnetosphere can cause operational anomalies in satellites. We investigate regular variations in these electrons and in Pc5 low-frequency waves that are capable of generating the energetic electrons. We find that both variables present similar periods in every solar cycle phase. We focus the analysis on the semiannual variation of these parameters. The shape of the observational semiannual curves correlate very well with the profiles of the main theories.
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