Comprehensive resarch on magnetoshere-ionosphere-thermosphere-mesosphere using the EISCAT Svalbard radar

斯瓦尔巴群岛BISCAT雷达（ESR）是世界上最伟大的观测电离层现象的工具之一。EISCAT雷达系统与BISCAT UHF和VHF （KST）雷达一起，为我们提供了基本的物理参数，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，分别于1981年和1987年开始运行。日地环境实验室（STEL）一直在利用ESR和KST雷达推动各种研究项目方面发挥着核心作用。1996年4月，日本以NIPR为代表加入了EISCAT科学协会，成为第七个协约国。STEL与全国各地的研究人员合作，一直在进行特殊计划（SP）实验，并创建共同计划（CP）数据档案。EISCAT数据库可通过网络提供给合作研究人员。通过VHF和ESR雷达的同步观测，发现了离子流出过程中场向和垂直分量温度的不均匀性。这个刚刚提交给《地球物理研究快报》（Geophysical Research Letters）的研究结果，肯定有助于阐明极地电离层中的离子外流。利用EISCAT CP数据库，正在进行各种研究。为了推进这些不同的研究，我们安装了一个由finish-EISCAT小组开发的名为GUISDAP的软件。该软件能够在我们自己的计算机上分析IS光谱数据。利用GUISDAP对大量CP数据进行了综合分析。

Svalbard BISCAT radar (ESR) is one of the greatest tools in the world for observing ionospheric phenomena in (lie polar cusp and cap regions. Together with BISCAT UHF and VHF (KST) radars in northern Scandinavia, which have been operated since 1981 and 1987 respectively, EISCAT radar systems provide us with essential physical parameters such as ion velocity, ion and electron temperatures, and electron density over the polar ionosphere. Solar-Terrestrial Environment Laboratory (STEL) has been playing a central role in promoting a variety of research projects using the ESR and KST radars of the EISCAT Scientific Association. Japan, represented by NIPR, joined the EISCAT Scientific Association as the seventh associate country in April 1996. STEL, in collaboration with researchers across the nation, has been conducting Special Program (SP) experiments and creating Common Program (CP) data archives. The EISCAT database is available to collaborative researchers through network.Based on simultaneous observations by VHF and ESR radars, we found the temperature inhomogencities 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 going on. To advance such various studies, we have installed a software named GUISDAP developed by the finish-EISCAT group. This software enables its to analyze IS spectra data on our own computer. Using GUISDAP, a comprehensive analysis of huge amount of CP data are carried on.