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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.

本项目包括磁层现象合作数据分析的几个要素。这些包括：(a)分析来自EISCAT雷达、EISCAT磁力计交叉和全球分布的磁观测站的数据，(b)分析出口者(DE)-1和-2获得的数据，以及(c)规划协调分析将部署在南极洲的自动地球物理观测站（AGO）的数据。在(a)项下，研究了1991年3月24日大磁暴期间发生的一次地磁突然启动和一次磁脉动Pc5事件。在(b)项下，DE-1磁力计1982年至1985年期间的数据已从美国宇航局-戈达德空间飞行中心转移到京都大学地磁和空间磁学数据分析中心。这些数据已经被绘制出来了，这些图的副本已经被送到戈达德太空飞行中心，供我们戈达德团队的成员进行分析。从这些数据和已经从戈达德转移到京都的DE-2数据分析得到的结果的例子包括：(i)我们已经证实了沿磁力线传播的Pc1脉冲的模式转换。（ii）得到了DE-2电场和磁场数据估算的电离层Pedersen电导与DE-1观测到的极光光度之间的定量关系。（三）我们在DE-2数据中发现并统计分析了中纬度电场波动，并将其与京都大学MU雷达观测到的电离层不规则现象进行了比较。澄清了国际货币基金组织对极尖和两极裂区附近的场向流和粒子降水的影响的新方面。(5)我们已经发现了由Pc1脉动引起电离层电子加热的证据。在(c)项下，积极参与规划非洲经委会会议上对非洲经委会数据的联合分析。