Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 43, issue 1
Articles | Volume 43, issue 1
https://doi.org/10.5194/angeo-43-319-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-43-319-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 43, issue 1
Regular paper
 | 
17 Jun 2025
Regular paper |  | 17 Jun 2025

Deterministic chaos in modulated multi-cell drifts of localized lower-hybrid oscillations excited by high-frequency waves in the ionosphere

Thomas B. Leyser

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Short summary
Electromagnetic emissions stimulated by powerful radio waves in the ionosphere exhibit an exponential power spectrum. Such a spectrum is a characteristic of deterministic chaos. A relevant model of parametrically excited localized lower-hybrid oscillations is derived. Numerical simulations show that, for parameter values typical of the ionospheric experiments, the temporal evolution may exhibit deterministic chaos, with an exponential spectrum that is consistent with the experimental results.
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