Joint Data Analysis of Magnetospheric Phenomena

磁层现象联合数据分析

基本信息

批准号：
03044128
负责人：
SUGIURA Masahisa
金额：
$ 4.48万
依托单位：
Tokai University
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

项目摘要

This project consists of several elements of cooperative data analysis of magnetospheric phenomena. These include : (a) analysis of data from the EISCAT radar, the EISCAT Magnetometer Cross, and globally distributed magnetic observatories, (b) analysis of data obtained by Exporers (DE)-1 and -2, and (c) planning of coordinated analysis of data from the Automatic Geophysical Observatories (AGO) to be deployed in Antarctica. Under (a), a geomagnetic sudden commencement and a magnetic pulsation Pc5 event which occurred during a large magnetic storm of March 24, 1991 were investigated. Under (b), DE-1 magnetometer data for the period 1982 through 1985 have been transferred from NASA-Goddard Space Flight Center to the Data Analysis Center for Geomagnetism and Space Magnetism, Kyoto University. These data have been plotted, and copies of the plots have been sent to Goddard Space Flight Center for analyses by the Goddard members of our team. Examples of the results obtained from the analyses of these data and those from DE-2 which have already been transferred from Goddard to Kyoto include the following : (i) We have confirmed a mode conversion of Pc1 pulsations propagating along magnetic field lines. (ii) Quantitative relationships between the ionospheric Pedersen conductance estimated from the DE-2 electric and magnetic field data and the auroral luminosity observed from DE-1 were obtained. (iii) We have found and statistically analyzed mid-latitude electric field fluctuations in the DE-2 data, and compared them with ionospheric irregularities observed by the MU radar of the Kyoto University. (iv) New aspects of the IMF-BY effects on the field-aligned currents and particle precipitation near the polar cusp and cleft regions have been clarified. (v) We have found evidence for an ionospheric electron heating by Pc1 pulsations. Under (c), an active participation was made in the planning of joint analyses of AGO data at the SCAR meeting.

该项目由磁层现象合作数据分析的多个要素组成。其中包括：(a) 对来自 EISCAT 雷达、EISCAT 十字磁力计和全球分布的磁观测站的数据进行分析，(b) 对 Exporers (DE)-1 和 -2 获得的数据进行分析，以及 (c) 协调协调的规划对来自将部署在南极洲的自动地球物理观测站（AGO）的数据进行分析。在(a)下，对1991年3月24日大磁暴期间发生的地磁突然启动和磁脉动Pc5事件进行了研究。在(b)下，1982年至1985年期间的DE-1磁力计数据已从NASA-戈达德太空飞行中心转移到京都大学地磁和空间磁学数据分析中心。这些数据已被绘制出来，并且绘图的副本已发送到戈达德太空飞行中心，供我们团队的戈达德成员进行分析。对这些数据以及已经从戈达德转移到京都的 DE-2 数据进行分析获得的结果示例如下： (i) 我们已经确认了沿磁场线传播的 Pc1 脉动的模式转换。 (ii) 获得了根据DE-2电场和磁场数据估计的电离层Pedersen电导与从DE-1观测到的极光光度之间的定量关系。 (iii) 我们发现并统计了DE-2数据中的中纬度电场波动，并将其与京都大学MU雷达观测到的电离层不规则性进行了比较。 (iv) IMF-BY 对极尖和裂隙区域附近场对准电流和粒子降水影响的新方面已得到澄清。 (v) 我们发现了 Pc1 脉动电离层电子加热的证据。在(c)项下，积极参与了SCAR会议上AGO数据联合分析的规划。