Waveform Analysis of Whistlers

  • H. Hagino
  • T. Ogawa
  • S. Yano


Some of the whistlers displayed in the sonagram show that the signal amplitude changes with time and/or frequency. In order to explain this phenomenon the following theory is presented. It is concerned with the propagation of discrete whistler mode waves under the influence of energy flow direction differing from the direction of the wave normal and the earth’s magnetic field.

The whistler waveforms were calculated in an integral form by means of the law of inverse Fourier-Lap I ace transform pair via the saddle point method for the delta function source. The calculated waveforms by using ionospheric parameters are compared with the observed ones on the ground in the frequency range upto 10 kHz – 1 kHz. It is shown as the result that the analytical result of whistler waveforms with polarized fading can explain the observed characteristics.


Whistler Wave Saddle Point Method Whistler Mode Fading Pattern Group Refractive Index 
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Copyright information

© Springer-Verlag Tokyo 1991

Authors and Affiliations

  • H. Hagino
    • 1
  • T. Ogawa
    • 2
  • S. Yano
    • 3
  1. 1.Department of Electromechanical EngineeringKagawa Technical CollegeKagawaJapan
  2. 2.Department of PhysicsKochi UniversityKochiJapan
  3. 3.Department of Electrical EngineeringKochi National College of TechnologyKochiJapan

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