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On the frequency shift in modulated VLF emissions
Affiliation:1. Faculty of Engineering, First Technical University, Ibadan, Oyo State, Nigeria;2. Space Science Centre (ANGKASA), Institute of Climate Change, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia;3. School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia;4. Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Japan;1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China;2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;3. University of Chinese Academy of Sciences, Beijing 100049, China
Abstract:The nature of the shift between the frequency of geomagnetic pulsations registered on the Earth and the modulation frequency of VLF emissions registered on board satellites is analyzed. The results obtained are compatible with the mechanism of VLF emissions modulations founded on the interaction between magnetosonic waves propagating perpendicular to the geomagnetic field and the energetic electrons exciting VLF emissions. It is shown that the frequency shift considered can be used for pulsations source localization in the magnetosphere.
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