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Research on polar upper atmosphere using the EISCAT Svalbard radar

使用 EISCAT 斯瓦尔巴雷达研究极地高层大气

基本信息

批准号：
08454135
负责人：
FUJII Ryoichi
金额：
$ 4.8万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

项目摘要

Svalbard EISCAT radar (ESR) is one of the greatest tools in the world for observing ionospheric phenomena in the polar cusp and cap regions. Together with EISCAT UHF and VHF (KST) radars in northern Scandinavia, which have been operated since 1981 and 1987 respectively, BISCAT radar systems provide us with essential physical parameters such as ion velocity, ion and electron temperatures, and electron density over the polar ionosphere.Based on simultaneous observations by VHF and ESR radars, we found the temperature inhomogeneities between temperatures of the field-aligned and its vertical components during ion-outflow event. This result, just submitted to Geophysical Research Letters, is sure to contribute to throwing light on the ion-outflow in the polar ionosphere.Using EISCAT CP database, various kinds of studies are made such as (1) seasonal variation as well as solar cycle dependence of the auroral E-region wind, (2) energy coupling between the thermosphere, ionosphere, and magnetosphere, (3) the ion motion relative to the local magnetic field line, (4) ion and electron heating, (5) ion outflow events, (6) ionospheric currents.To advance such various studies, we have installed a software named GUISDAP developed by the finish-EISCAT group. This software enables us to analyze IS spectra data on our own computer. Using GUISDAP, a comprehensive analysis of huge amount of CP data are carried on.

斯瓦尔巴群岛 EISCAT 雷达 (ESR) 是世界上观测极尖和帽盖区域电离层现象的最强大工具之一。与斯堪的纳维亚半岛北部分别自 1981 年和 1987 年开始运行的 EISCAT UHF 和 VHF (KST) 雷达一起，BISCAT 雷达系统为我们提供了必要的物理参数，例如离子速度、离子和电子温度以及极地电离层上的电子密度。基于 VHF 和 ESR 雷达的同时观测，我们发现了极地电离层上的离子速度、离子和电子温度以及电子密度等基本物理参数。离子流出事件期间场对准及其垂直分量的温度。这一成果刚刚提交给《地球物理研究快报》，必将为揭示极地电离层中的离子流出做出贡献。利用EISCAT CP数据库，进行了各种研究，例如（1）极光E区风的季节变化和太阳周期依赖性，（2）热层、电离层和磁层之间的能量耦合，（3）相对于电离层的离子运动局部磁场线，（4）离子和电子加热，（5）离子流出事件，（6）电离层电流。为了推进这些各种研究，我们安装了由finish-EISCAT小组开发的名为GUISDAP的软件。该软件使我们能够在自己的计算机上分析 IS 光谱数据。利用GUISDAP对海量CP数据进行综合分析。