Study on electromagnetic and particle environment variations in the magnetosphere.

磁层电磁和粒子环境变化研究。

基本信息

批准号：
02402015
负责人：
OGUTI Takasi
金额：
$ 24.45万
依托单位：
Nagoya University, Solar-Terrestrial Environment Laboratory
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (A)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

项目摘要

The solar wind interacts with the earth's magnetic fields, and creates the bow shock, magnetosheath, magnetopause, boundary layer, various complicated structure in the magnetosphere, and. many kinds of magnetospheric disturbances. In order to study the electromagnetic and particle environment variations caused by the solar wind changes and the transfer processes of energy, momentum and mass from the solar wind into the magnetosphere and ionosphere, globally coordinated observations and data analysis were carried out in this project. All-sky TV-camera, four channel meridian scanning photometers, and high-sensitive monochromatic all-sky TV camera were installed at cusp, high, and low latitudes to investigate global auroral dynamics. Imaging (2-dimensional multi-beam) riometer was also installed in the polar cap to understand the characteristics of movement and spatial formation of auroral absorption during the substorm. Simultaneous magnetic observations along the 2100 magnetic meridian were carried out to get unique information on ULF wave energy transfer process from high latitude to the 6, quatorial region. In order to elucidate propagation mechanis of LF/VLF wa#es, Japan-Australia conjugate observations of LF/VLF transmission signals were also carried out. The following results are newly obtained.(1) Low-latitude aurora can be detected at low latitude of L=1.6 during a usual magnetic storm, indicating that particle acceleration process occurs in the deep inner magnetosphere frequently.(2) The solar wind ULF wave energy easily couples into a field-line oscillation around L=1.6, where may be associated with the plasma wave turbulence disc observed by EXOS-D satellite in the deep inner magnetosphere.(3) The conjugate measurements of LF/VLF waves suggest the penetration of storm-related energetic electrons and magnetospheric electric fields into the low-L shell below 2.These results evidence the energy, mass penetrations into the deep inner region.

太阳风与地球的磁场相互作用，并产生弓形冲击，磁石，磁磁，边界层，磁层中的各种复杂结构，以及。许多磁层干扰。为了研究由太阳风变化以及能量，动量和质量转移过程从太阳能风变到磁层和电离层引起的电磁和颗粒环境变化，在该项目中进行了全球协调的观测值和数据分析。全天候的电视摄像机，四个通道子午线扫描光度计和高敏感的单色全sky电视摄像头在cusp，高纬度和低纬度安装，以研究全局的极光动力学。在极盖中还安装了成像（二维多光束）赖仪，以了解在实量过程中运动吸收的运动特征和空间形成的特征。进行了沿2100个磁性子午线的同时进行磁观测，以获取有关ULF波能量转移过程的独特信息，从高纬度到6，quatorial区。为了阐明LF/VLF WA＃的传播机制，还进行了日本 - 澳大利亚结合物的观测值LF/VLF传输信号。 The following results are newly obtained.(1) Low-latitude aurora can be detected at low latitude of L=1.6 during a usual magnetic storm, indicating that particle acceleration process occurs in the deep inner magnetosphere frequently.(2) The solar wind ULF wave energy easily couples into a field-line oscillation around L=1.6, where may be associated with the plasma wave turbulence disc observed by EXOS-D satellite in the deep inner （3）LF/VLF波的共轭测量表明，与暴风雨相关的能量电子和磁层电场渗透到低于低位的低位壳中。