Solar Wind Energy Transfer into the lnner Magnetosphere

为了了解全球磁层对太阳风变化的响应，并调查磁层扰动的传输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，沿着210度磁子午线进行协调的地面观测。210度MM项目取得的结果概述如下：(1)由于DP电场穿透到低纬电离层，突然开始(SC)和突然脉冲(Si)的南北半球不对称。(2)低纬极光具有不可见的强度，与H和D磁分量的湾型变化以及大幅度的PI磁脉动有关；(3)由Sc和Si激发的腔状和场线Pc_3-4共振；(4)Pc_3在低纬地区的特性，如较大的幅度下降小于L=1，5，并且在低纬度…具有较长的周期由于薄电离层模型理论假设的局限性和场线振荡的质量负荷效应，PI2在赤道的位置和幅度相似于磁纬50度以下，在等离子体顶纬度和磁赤道发生位相反转，以及(6)与磁扰相关的低频哨声模信号和穿透高能电子的强度增加。另一方面，还开展了沿磁赤道区的纵向协调观测，以阐明赤道电喷流和异常地磁脉动等赤道现象的机制。(1)巴西和秘鲁磁赤道区多个观测点的数据采集；(2)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；(4)赤道电喷流的空间结构和反电喷流与电离层电场的关系。较少

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