Research on Electromagnetic Radiation and Propagation from the Earth

地球电磁辐射及其传播研究

• 批准号: 61540309
• 负责人: HASHIMOTO Kozo
• 金额: $ 0.83万
• 依托单位: Tokyo Denki University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1986
• 资助国家: 日本
• 起止时间: 1986 至 1987
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-61540309/
• 关键词: Ray Tracing; Hot Plasma; Nonthermal Continuum; Electrostatic Cyclotron Waves; Z mode; Polarization; Arrival Directions; オーロラ波; DEー1; AKR; Oモード; ホイスラーモード; 偏波レイトレイシング; DE-1; グラフィッ端末; 静電波; 電磁波

This research covers the following two topics.1. Ray tracing in a hot plasmaRay tracing code in a hot plasma which can calculate ray paths of both electrostatic and electromagnetic waves was developped. This is applied to propagation of the electrostatic cyclotron waves near the equator and observed areas of the waves by scientific satellites are explained. Propagation processes and continuous conversions of the electrostatic waves to the Z mode and its mode conversion to the O mode through the Radio Window are clarified. This result is valuable for the generation mechanism of the nonthermal continuum radiation.2. Analysis of plasma waves observed by a scientific satelliteElectromagnetic plasma waves observed by the DE-1 satellite are analyzed. Observed areas of the Z mode are surveyed and the results are compared with ray tracing calculations. Possibility of a new generation mechanism of the Z mode is suggested. Another paper analyzes auroral waves observed by the same satellite. This discriminates wave propagation modes by polarizations, arrival directions as well as wave spectra. Ray tracing confirms these results.

本研究涵盖以下两个主题。热等离子体中的光线追迹编制了热等离子体中的光线追迹程序，可计算静电波和电磁波的光线路径。这是适用于赤道附近的静电回旋波的传播和观测区域的波的科学卫星进行了解释。阐明了静电波通过射电窗口向Z模和O模的连续转换和传播过程。这一结果对非热连续辐射的产生机制有一定的参考价值.对DE-1卫星观测到的电磁等离子体波进行了分析。Z模式的观测区域进行了调查，并将结果与光线追迹计算进行了比较。提出了一种新的Z模产生机制的可能性。另一篇论文分析了同一颗卫星观测到的极光波。这区分波传播模式的偏振，到达方向以及波谱。光线追踪证实了这些结果。

项目成果

K.Hashimoto;W.Calvert: J.Geophysical Research. (1988)

K.Hashimoto；W.Calvert：J.地球物理研究。

K.Yamaashi,K.Hashimoto,I.Kimura.: Memoirs of National Institute of the Polar Research. No.47. 97-108 (1987)

K.Yamaashi、K.Hashimoto、I.Kimura.：国立极地研究所回忆录。

W.Calvert,K.Hashimoto.: Journal of Geophysical Research. (1988)

W.Calvert，K.Hashimoto。：地球物理研究杂志。

K. Yamaashi,; K. Hashimoto,; I. Kimura.: "3-D Electrostatic and Electromagnetic ray tracing in the Magnetosphere" Memoirs of National Institute of Ploar Research. No.47. 97-108 (1987)

K.山石，；

K.Yamaashi;K.Hashimoto;I.Kimura: Memoirs of National Institute of Polar Research. (1987)

K.Yamaashi；K.Hashimoto；I.Kimura：国家极地研究所回忆录。