The distribution characteristics of the flows in the near-Earth region: TC-1 observational results  

作　　者：ZHANG LingQian LIU ZhenXing WANG JiYe MA ZhiWei PU ZhuYin SHEN Chao GUO JiuLing 

机构地区：[1]Center for Space and Applied Research, Chinese Academy of Sciences, Beijing 100080, China [2]College of Physics and Electronic Engineering, Central University for Nationalities, Beijing 100081, China [3]Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China [4]School of Earth and Space Science, Peking University, Beijing 100871, China [5]Modern Education Technology Center, Peking University, Beijiing 100871, China

出　　处：《Chinese Science Bulletin》2007年第23期3267-3271,共5页

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 40390150, 40536030 and 40674094)

摘　　要：TC-1 observational results clearly indicate that the velocity of the flows in the near-Earth region is de- pendent on the satellite location. The flow speed decreases while satellite moves close to the Earth. The plasma flow in the region close to the Earth tends to drift into the midnight region from the dawn and dusk region while the flow in the region away from the Earth shows an opposite drift. The obser- vational results also show that the tailward flows are mainly located in the plasma sheet boundary while the earthward flow becomes dominant in the plasma sheet. It is found that both the strong tailward and earthward flows are distributed in the region around X= -11Re, which coincides with the trigger region of the substorm onset. Hence, it may suggest that the flows are related with the trigger of the substorm onset. In addition, the BBFs coming from the mid-tail maily distributed in the region where X<-9RE and |Z|<3RE that differs from the convection.TC-1 observational results clearly indicate that the velocity of the flows in the near-Earth region is dependent on the satellite location. The flow speed decreases while satellite moves close to the Earth. The plasma flow in the region close to the Earth tends to drift into the midnight region from the dawn and dusk region while the flow in the region away from the Earth shows an opposite drift. The observational results also show that the tailward flows are mainly located in the plasma sheet boundary while the earthward flow becomes dominant in the plasma sheet. It is found that both the strong tailward and earthward flows are distributed in the region around X= -11 Re, which coincides with the trigger region of the substorm onset. Hence, it may suggest that the flows are related with the trigger of the substorm onset. In addition, the BBFs coming from the mid-tail maily distributed in the region where X〈-9R E a n d ｜Z｜ 〈 3 R E that differs from the convection.

关 键 词：地球 磁尾 地形分布 数据收集 

分 类 号：P3[天文地球—地球物理学]