GEOS-1 observation of hiss-triggered chorus emissions in the outer magnetosphere and their generation model

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概要

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• The co-existence of hiss and chorus is frequently observed on board satellites in the outer magnetosphere, and chorus emissions are observed in the data from GEOS-1 satellite to start nearly at the uppermost frequency of the hiss band. The direction finding measurements have been made for these hiss-triggered chorus events. On the basis of the direction finding results and detailed analysis of the fine structures in the hiss band, we have suggested a generation model how a chorus is triggered by a hiss such that some coherent wavelets near the top of the hiss band phase-bunch electrons at the equator, and these phasebunched electrons radiate a coherent signal as they move away from the equator. Also, theoretical computations have been carried out in order to explain the df/dt, θ value (the polar angle between the wave normal direction and the Earth's magnetic field) and other factors by means of a two-dimensional ray-tracing method. The differences between the experimental and theoretical values are pointed out, and some possibilities to remedy these discrepancies are discussed.

• 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

• Hattori Katsumi

  Solar-terrestrial Environmental Laboratory Nagoya University

• Hattori Katsumi

  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

関連論文

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