Studies on the generation and propagation chracteristics of magnetospheric plasma waves in the inner plasmasphere based on the conjugate observations in Australia and Japan

基于澳大利亚和日本共轭观测的磁层等离子体波内层等离子体波产生和传播特性研究

• 批准号: 62043037
• 负责人: TANAKA Yoshihito
• 金额: $ 1.09万
• 依托单位: Research Institute of Atmospherics, Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Overseas Scientific Research
• 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-62043037/
• 关键词: Conjugate; LF; Whistler; Interaction; Geomagnetic; Pulsation; Plasmasphire; 磁気圏

Baxed on tne conjugate measurements in Australia and Japan, this projuct is composed of two research irems; studies on wave-particle interactions in the plasmasphere, and studies of the generation and propagation of geomagnetic pulsations. As for the first item, theconjugate measurements of lf Decca signals from Hokkaido at Birdsville(L=1.54) and its environs have indicated the dnhanced intensity of whistler-mode waces of the LF signals, due to interactions of the waves with enegetic electrons injected into inner magnetosphere in association with geomagnetic disturbances, and the Doppler shift of the received frequencies, due to storm-associated large-scale plasmaspheric electric lields. The conjugate measurements of VLF transmitter signals from an Alpha station in Eastern USSR at Ceduna (L=1.93) have identified the propagation mechanisms of whistler-mode waves and whistlers in the middle latitude magnetosphere.As for the second item, the simultaneous measurements were made at the conjugate points; Birdsville and Asahikawa, In order to investigate the Latitudinal and longitudinal effects of the internsity and polarization of geomagnetic pulsations of pc 3 type, simultaneous measurements were carried out at Adelaide(L=2.1) in the same meridian plane as for Birdsville, and also at Dalby(L=1.55) being apart 1,300 Km in tne longitudinal direction from Birdsville. And, the polarization and amplitude characteristics of pc 3 pulsations have been identified.

这个项目是在澳大利亚和日本的共轭测量基础上完成的，包括两个研究方向：等离子体中波粒相互作用的研究和地磁脉动的产生和传播的研究。关于第一项，在Birdsville对来自北海道的低频台卡信号进行了共轭测量（L=1.54）及其周围地区的观测结果表明，由于与地磁扰动有关的高能电子注入内磁层的相互作用以及接收频率的多普勒频移，低频哨声波强度增强，这是由于与风暴相关的大规模等离子体层电场。苏联东部Ceduna阿尔法站甚低频发射机信号的共轭测量（L=1.93）的观测结果，确定了中纬磁层哨声波和哨声的传播机制。Birdsville和Asahikawa，为了研究pc 3型地磁脉动强度和极化的纵向和纵向效应，同时在与伯兹维尔相同的子午面内的阿德莱德（L=2.1）和在纵向上与伯兹维尔相距1,300公里的达尔比（L=1.55）进行测量。并对pc 3脉动的偏振和振幅特征进行了识别。