Study of Particle Precipitation and Wave-Particle Interactions in the Magnetosphere-Ionosphere Coupling System

为了有效地分析在1985-86年多站战役和航天器上获得的大量数据，在VAX3200工作站上安装了图形软件[UNIRAS]。我们开发了几个软件，用于极光图像数据的处理和各种时间序列的光谱的频率-时间显示等。这些软件已用于分析1989年2月发射的EXOS-D卫星的紫外极光图像和三轴搜索线圈数据。我们获得了扩展椭圆形的全球图像和大型磁暴期间扩展椭圆形中极光亚暴初始变亮的高时间分辨率图像。极光电磁噪声的搜索线圈测量揭示了在赤道L值为1.52.5的等离子体层附近以及沿极光场线存在各种极低频等离子体波。对ISEE和AMPTE/CCE航天器的磁场数据进行了分析，以研究场定向…的特征在等离子体片边界和近尾区有更多的电流，并且在日侧磁层顶附近有类似通量传输事件的双峰磁脉冲的性质。对ISEE资料的统计分析表明，近尾区的场向电流特征与低海拔的观测结果是一致的。从理论上研究了磁层中气球不稳定性与压缩Pc5波激发机制的关系，发现压缩Pc5波仅限于磁赤道附近的局域区.利用几个地面站同时获得的高分辨率电视数据研究了极光的动力学形态.结果表明，南北排列弧线的发展是极光亚暴中心区域的一个基本特征，与地球同步轨道上出现的无色散电子注入现象相对应。同步轨道上的色散电子注入是在与脉动极光区共轭的当地时间段内观测到的。较少

In order to analyze a plenty of data efficiently, which were obtained in the multi-station campaign in 1985-86 and with spacecraft, a work station, VAX 3200, was installed with a graphic software [UNIRAS]. We developed several software for processing of aurora image data and for frequency-time displays of spectra of various time series, etc.. These software have been used for the analyses of UV auroral images and triaxial search coil data from the EXOS-D satellite launched in February, 1989. We obtained global pictures of expanded oval and high-time resolution images for the initial brightening of auroral substorm in an expanded oval during large magnetic storms. Search coil measurements of ELF electromagnetic noises reveal the existence of a variety of ELF plasma waves near the equatorial plasmasphere of L values, 1.5-2.5 as well as along the auroral field lines.Analyses of magnetic field data from ISEE and AMPTE/CCE spacecraft have been made to investigate signatures of field-aligned … More currents in the boundary of the plasmasheet and in the near-tail region, and properties of bimodal magnetic impulses like flux transfer events near the dayside magnetopause. The statistical analysis of ISEE data indicates that the field-aligned current signatures in the near-tail region are consistent with observations at low-altitudes. The ballooning instability in the magnetosphere was theoretically examined in relation to the excitation mechanism of compressional Pc 5 waves, which are shown to be confined to a localized region near the magnetic equator.Dynamic morphology of auroras has been studied by using high-resolution TV data obtained simultaneously at several ground stations. It is found that development of north-south aligned-arcs is an essential feature in the central region of auroral substorm and that correspond to appearances of dispersionless electron injections at geosynchronous orbit. Dispersive electron injections at synchronous orbit are observed in local time sector conjugate to the region of pulsation auroras. Less