Study of electrodynamics in the magnetosphere and the ionosphere based on a generic auroral pattern.

本研究的目的是通过一种独特的分析，将电离层测量的这些参数置于从全球极光图像确定的一般亚暴的背景下，从而获得与极光亚暴事件相关的大尺度电动力学参数、场向电流、电场和等离子体的特征。在第一年，即1993财政年度，我们存档了卫星和EISCAT雷达数据，并在国际和国家合作研究下建立了它们的数据库。1994财年，我们引进了新的硬盘工作站，并进一步开展了数据归档工作。这些数据通过网络（internet）向全国合作科学家开放。研究结果表明：1)明确了亚暴期间大尺度电动力学参数的特征；2)确定了利用EISCAT雷达观测得到的电子密度曲线推导能谱的可靠方法；3)定量地了解了中性风速与地磁活动的关系。

The research has aimed at obtaining the characteristics of the large-scale electrodynamic paramenters, field-aligned currents, electric fields, and plasmas, which are associated with auroral substorm events, through a unique analysis which places the ionospheric measurements of these parameters into the context of a generic substorm determined from global auroral images. In the first year, FY1993, we archived satellites' and EISCAT radar data and constructed their database under international and national collaborative research. In FY1994, we introduced a new workstation with hard disks and further proceeded data archives. These data have been opened to nationwide collaborative scientists through network (internet). The results gained from this research are : 1) characteristics of the large-scale electrodynamic parameters during substorms were made clear, 2) A reliable procedure to derive energy spectra using electron density profiles obtained from EISCAT radar observations was confimed, and 3) Relationships between neutral wind velocity and geomagnetic activity was quantitatively understood.