Solar Wind Energy Transfer into the lnner Magnetosphere

为了了解全球磁层对太阳风变化的反应，并调查磁层扰动的转移或传播过程和纬度结构，正在与24个国际组织和4个国家组织合作，沿沿着210度磁子午线进行协调一致的地面观测。从210度MM计划获得的结果概述如下：（1）由于DP电场穿透低纬电离层，突然开始（SC）和突然脉冲（Si）的北方和南半球的不对称性。(2)低纬极光，强度不可见，与H和D磁分量的海湾型变化有关，也与大振幅Pi磁脉动有关; 3）由sc和si激发的空腔状和磁力线Pc 3 -4共振; 4）低纬Pc 3的特殊性，如振幅下降小于L= 1，5，低纬Pc 3的周期较长， ...更多信息 由于薄电离层模型理论假设的局限性和磁力线振荡的质量负荷效应，使Pi 2的纬度分布向赤道方向偏移; 5）Pi 2的纬度分布，如出现频率和振幅的相似性小于50度磁纬，以及在等离子体层顶纬度和磁赤道处的相位反转，（6）与磁扰动相关的低频哨声模式信号和穿透高能电子的强度增加。另一方面，沿着磁赤道地区的纵向坐标观测也在进行中，以阐明赤道电喷流和异常地磁脉动活动等赤道现象的机制。对所得数据进行了分析，初步结果如下：（1）在巴西和秘鲁磁赤道区域的多个观测点进行数据采集，（2）通过FMCW雷达同时测量地磁活动和电离层活动，（3）赤道磁脉动的幅度范围为0.1-1.0 nT，（4）赤道电喷流的空间结构以及逆电喷流与电离层电场的关系。少

In order to understand the global magnetospheric responses to solar wind changes and to investigate the transfer or propagation processes and latitudinal structures of magnetospheric disturbanoes, coordinated ground-based observations along the 210 degree magnetic meridian (MM) are being conducted in cooperation with 24 international and 4 national organizations. The results obtained from the 210 degree MM project are outlined as follows ; (1) a northern and southern hemisphere asymmetry for sudden commencements (SC) and sudden impulses (Si), due to DP-electric fields penetrating to the low-latitude ionosphere. (2) low-latitude auroras, occurring with invisible intensity in association with bay-type variation of H and D magnetic components and also large amplitude Pi magnetic pulsations, 3) cavity-like and field line Pc3-4 resonances stimulated by sc and si, (4) peculiarities of Pc 3 at low latitudes, such as larger amplitude decrease less than L=1,5, and longer period at lower latitud … More es towards the equator, due to the limitation of theoretical hypothesis of the thin ionosphere model and the mass loading effects of the field line oscillation, 5) latitudinal profile of Pi2, such as similarity in occurrence and amplitude less than 50 degree magnetic latitude, and phase reversal at the plasmapause latitude and the magnetic equator, and (6) intensity increase of LF whistler-mode signals and penetrating energetic electrons associated with magnetic disturbances.On the other hand, longitudinally coordinated observations along the magnetic equator region are also being carried out, in order to elucidate the mechanisms of equatorial phenomena such as equatorial electro-jet currents and anomalous geomagnetic pulsation activities. The obtained data are being analyzed, and the initial results are in the followings ; (1) data acquisition at multiple observation sites in the magnetic equator region in Brazil and Peru, (2) simultaneous measurement of geomagnetic activities with ionospheric activities by FMCW radar, (3) amplitude range of 0.1-1.0 nT of equatorial magnetic pulsations, (4) spatial structures of equatorial electro-jet currents and relation between counter electro-jet currents and ionospheric electric fields. Less