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Study on the characteristics of polar ionosphere, thermosphere and mesosphrere using SuperDARN HF radars

利用SuperDARN HF雷达研究极地电离层、热层和中层特征

基本信息

批准号：
16340148
负责人：
SATO Natsuo
金额：
$ 10.79万
依托单位：
National Institute of Polar Research
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16340148/
关键词：
Super DARN HF radar aurora plasma convection polar region ionosphere mesosphere polar mesosphere summer echo(PMSE)極域撹乱

项目摘要

The Super Dual Auroral Radar Network (SuperDARN) is a global-scale network for HF radars capable of sensing backscatter from ionospheric irregularities in the E and F-regions of the high-latitude ionosphere. Such HF radar network has been deployed in Arctic and Antarctic regions. SENSU Syowa East and South radars in Antarctica consist of this radar network. The HF radar Doppler velocity information contained in the backscattered signals has combined to yield maps of high-latitude plasma convection and the convection electric filed. Using the SuperDARN network data we studied various large-scale and meso-scale phenomena/dynamics observed in the polar ionosphere, which occur by the processes of the magnetosphere-ionosphere coupling, and produced following results; 1) Polar mesospheric summer echo (PMSE) phenomena has been detected in Antarctic region using the near range echo obtained by the SUNSE Syowa radars and we analyzed their statistical characteristics, 2) Finding new evidences that optical pulsating auroras are associated with the same period E-region electric fluctuations, 3) EISCAT heating experiment has 'conducted in association with Finland SuperDARN radar and EISCAT, and found fine interesting temporal-spatial characteristics, 4) Optical auroras in the Cusp region showed different types for generation region and generation condition, 5) We examined Ionospheric disturbances in conjugate hemispheres during the 23 November 2003 solar eclipse using magnetometer data obtained at Syowa and Dome-Fuji in Antarctica and their conjugate observatories in Iceland, Scandinavia and Greenland together with the SuperDARN BF radars, 7) Stereo-type radar system has been installed at Syowa radar.These scientific results have been presented in the international workshops/meetings and also published to international scientific journals.

超级双极光雷达网络（SuperDARN）是一个全球范围的高频雷达网络，能够感测高纬度电离层 E 和 F 区域电离层不规则性的反向散射。这种高频雷达网络已部署在北极和南极地区。南极洲的 SENSU Syowa East 和 South 雷达由该雷达网络组成。包含在反向散射信号中的高频雷达多普勒速度信息结合起来产生高纬度等离子体对流和对流电场的图。利用SuperDARN网络数据，我们研究了在极地电离层中观察到的各种大尺度和中尺度现象/动力学，这些现象/动力学是由磁层-电离层耦合过程发生的，并产生了以下结果； 1）利用SUNSE昭和雷达获得的近距离回波在南极地区探测到了极地中层夏季回波（PMSE）现象，并分析了其统计特征，2）找到了光学脉动极光与同期E区电波动相关的新证据，3）EISCAT加热实验“与芬兰SuperDARN雷达联合进行” EISCAT，并发现了有趣的时空特征，4）尖点区域的光学极光显示出不同类型的生成区域和生成条件，5）我们使用在南极洲昭和和圆顶富士及其在冰岛、斯堪的纳维亚和格陵兰的共轭天文台获得的磁力计数据检查了2003年11月23日日食期间共轭半球的电离层扰动与SuperDARN BF雷达一起，7）Syowa雷达安装了立体雷达系统。这些科学成果已在国际研讨会/会议上发表，并发表在国际科学期刊上。