The wave normal directions of chorus emissions in the outer magnetosphere

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概要

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• The GEOS-1 satellite wave data have been used to determine the wave normal directions of chorus emissions in the off-equatorial region of the outer magnetosphere based on the wave distribution function method. The wave normal directions with respect to the magnetic field have been discussed as functions of wave frequency normalized by the local gyrofrequency and of the slope, df/dt of an emission. Two different kinds of chorus structures (rising tone and impulsive one) have been treated. A comparison of the present behaviour of off-equatorial wave normal directions with the previous equatorial wave normal measurements has enabled us to discuss the generation and propagation mechanism of chorus emissions with different structures (rising tone, falling tone, constant frequency tone and impulsive one), and finally we suggest the future problems to study.

• 国立極地研究所の論文

著者

• Parrot Michel

  Laboratoire De Physique Et Chimie De L'environnement

• Hayakawa Masashi

  Research Institute of Atmospherics, Nagoya University

• Shimakura Shin

  Department of Electrical and Electronic Engineering, Faculty of Engineering, Chiba University

• Hattori Katsumi

  Research Institute of Atmospherics, Nagoya University

• HAYAKAWA Masashi

  University of Electro-Communications

• LEFEUVRE Francois

  Laboratoire de Physique et Chimie de l'Environnement

• Hattori Katsumi

  Solar-Terrestrial Environmental Laboratory, Nagoya University

• Muto Hiroyasu

  Research Institute of Atmospherics, Nagoya University

• Hattori Katsumi

  Solar-terrestrial Environmental Laboratory Nagoya University

• Hattori Katsumi

  Research Institute Of Atmospherics Nagoya University

• Muto Hiroyasu

  Research Institute Of Atmospherics Nagoya University

• Shimakura Shin

  Department Of Electrical And Electronic Engineering Chiba University

• Hayakawa M

  Univ. Electro‐communications Chofu‐shi Jpn

• Hayakawa Masashi

  Research Institute Of Atmospherics Nagaya University

• Lefeuvre F.

  Laboratoire De Physique Et Chimie De L'environnement

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