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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 24, issue 8
Ann. Geophys., 24, 2151–2158, 2006
https://doi.org/10.5194/angeo-24-2151-2006
© Author(s) 2006. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 24, 2151–2158, 2006
https://doi.org/10.5194/angeo-24-2151-2006
© Author(s) 2006. This work is distributed under
the Creative Commons Attribution 3.0 License.

  13 Sep 2006

13 Sep 2006

An automatic method to determine the frequency scale of the ionospheric Alfvén resonator using data from Hylaty station, Poland

A. Odzimek*,1, A. Kułak2, A. Michalec2, and J. Kubisz2 A. Odzimek et al.
  • 1Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland
  • *now at: Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK
  • 2Astronomical Observatory, Jagiellonian University, Orla 171, 30-244 Kraków, Poland

Abstract. ULF/ELF magnetic field data recorded at the "Hylaty" station in Poland (49°19' N, 22°56' E; L≃2) are analysed to find the characteristics of spectral resonance structures (SRS) in the frequency range 1–5 Hz, related to the ionospheric Alfvén resonator (IAR). An automatic procedure is employed to SRS events observed at "Hylaty" during the nighttime in 2001–2003, to calculate the parameter which determines the separation between the harmonics of the resonator, termed the frequency scale. Diurnal and seasonal variations of the frequency scale within the range of 0.4–0.8 Hz have been found. The usefulness and disadvantages of this particular method of SRS analysis, and of other methods, are discussed.

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