Conjugate study on electromagnetic dynamics of polar ionosphere using SuperDARN HF radars and ground-based observations

双极光雷达网是一个全球范围的高频雷达网络，能够监测高纬度电离层E区和F区电离层不规则性引起的后向散射。这种高频雷达网已部署在北极和南极地区。南极洲的锡奥瓦东部和南部雷达组成了这个雷达网。后向散射信号中包含的高频雷达多普勒信息结合在一起，得到了高纬度等离子体对流和对流电场图。利用SuperDARN网络数据，我们研究了磁层-电离层系统中的大尺度动力学过程，如在变化的IMF条件下对流电场的全球构型的演变，以及磁层-电离层空穴中大尺度MHD波的发展和全球范围。极光现象的共轭和非共轭的观测为我们提供了关于极光产生和传播机制的有用信息。有一个…然而，在北极和南极地区，观测到的共轭对很少。幸运的是，南极的Syowa站距离冰岛的Husafell地磁共轭站非常近(~不到100公里)，这是极光地带理想的一对共轭站。极光区位于开放场线和闭合场线的交界处，出现了许多强烈的极光现象。在我们的研究中，共轭观测，如研究共轭点的确切位置及其运动，共轭极光的运动，脉动极光的开关相位关系，共轭点处的极光起始时间差或极光分裂和亚暴等，应有助于我们推断发生在磁层和电离层之间的极光现象的物理性质。我们还考察了SuperDARN雷达之间的多仪器观测，南极中山站和南极站的光学观测，Geoail卫星和EISCAT雷达，较少

The Dual Auroral Radar Network (DARN) 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. Syowa East and South radars in Antarctica consist of this radar network. The HF radar Doppler 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 on large-scale dynamical processes in the magnetosphere-ionosphere system, such as the evolution of the global configuration of the convection electric field under changing IMF conditions and the development and global extent of large-scale MHD waves in the magnetosphere-ionosphere cavity.Observations of conjugacy and non-conjugacy of auroral phenomena give us useful information on the generation and propagation mechanism of aurora. There a … More re however very few conjugate pairs of observations in the northern and southern polar regions. Fortunately, Syowa Station in Antarctica is located very close to (〜 less than 100 km) the geomagnetically conjugate station of Husafell in Iceland, making an ideal pair of conjugate stations in the auroral zone. The auroral zone is located in the boundary region between open and closed field lines, where many intense auroral phenomena occur. Conjugate observations in our study, such as studies ot the exact location of conjugate points and their movements, the movement of conjugate auroras, on-off phase relation of pulsation aurora, the onset time difference or auroral breakup and substorm at conjugate points etc., should help us to infer the physical nature of auroral phenomena which occur between the magnetosphere and the ionosphere.We also examined the multi-instrument observations among SuperDARN radars, optical observation at Zhongshan and South Pole Stations in Antarctica, Geotail satellites, and EISCAT radars, Less