Cold electron temperature in the inner magnetosphere estimated through the dispersion relation of ECH waves from the Arase satellite observations

IF 1.6 4区地球科学 Q3 ASTRONOMY & ASTROPHYSICS

Radio Science Pub Date : 2024-06-01 DOI:10.1029/2023RS007927

Tomoe Taki;Satoshi Kurita;Hirotsugu Kojima;Yoshiya Kasahara;Shoya Matsuda;Ayako Matsuoka;Yoichi Kazama;Chae-Woo Jun;Shiang-Yu Wang;Sunny W. Y. Tam;Tzu-Fang Chang;Bo-Jhou Wang;Yoshizumi Miyoshi;Iku Shinohara

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引用次数: 0

Abstract

We have analyzed Electrostatic Electron Cyclotron Harmonic (ECH) waves observed using interferometry observation mode performed by the Arase satellite to estimate low-energy electron temperatures. Interferometry can be used to calculate velocities, but the Arase satellite can only perform interferometry observations in a one-dimensional direction. We proposed a method to estimate the wave vector of the observed ECH waves from the observed electric fields and calculated the phase velocity for each frequency. We determined the particle parameters from the particle detector and the upper hybrid resonance and estimated the unknown low-energy electron temperature from the agreement between the observed ECH dispersion relation and the theoretical dispersion curves. We performed our analysis for six events and found that the low-energy electron temperature in the observed region is on the order of 1 eV.

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通过 Arase 卫星观测的 ECH 波的弥散关系估算内磁层的冷电子温度

我们分析了利用Arase卫星进行的干涉测量观测模式观测到的静电电子回旋谐波（ECH），以估算低能电子温度。干涉测量可用于计算速度，但 Arase 卫星只能进行一维方向的干涉测量观测。我们提出了一种方法，从观测到的电场中估算出观测到的 ECH 波的波矢量，并计算出每个频率的相位速度。我们通过粒子探测器和上混合共振确定了粒子参数，并根据观测到的 ECH 色散关系和理论色散曲线之间的一致性估算了未知的低能电子温度。我们对六个事件进行了分析，发现观测区域的低能电子温度约为 1 eV。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Radio Science 工程技术-地球化学与地球物理

CiteScore

3.30

自引率

12.50%

发文量

112

审稿时长

1 months

期刊介绍： Radio Science (RDS) publishes original scientific contributions on radio-frequency electromagnetic-propagation and its applications. Contributions covering measurement, modelling, prediction and forecasting techniques pertinent to fields and waves - including antennas, signals and systems, the terrestrial and space environment and radio propagation problems in radio astronomy - are welcome. Contributions may address propagation through, interaction with, and remote sensing of structures, geophysical media, plasmas, and materials, as well as the application of radio frequency electromagnetic techniques to remote sensing of the Earth and other bodies in the solar system.