| 2001年1月26日高纬磁层顶通量管事件的观测研究——空间电流密度计算及分析 |
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| 引用本文： | 肖池阶,濮祖荫,黄宗英,傅绥燕,谢伦,宗秋刚,T Fritz,K-H Glassmeier,刘振兴,曹晋滨,史建魁,沈超,路立,王迺权,陈涛.2001年1月26日高纬磁层顶通量管事件的观测研究——空间电流密度计算及分析[J].地球物理学报,2004,47(4):555-561. |
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| 作者姓名： | 肖池阶 濮祖荫 黄宗英 傅绥燕 谢伦 宗秋刚 T Fritz K-H Glassmeier 刘振兴 曹晋滨 史建魁 沈超 路立 王迺权 陈涛 |
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| 作者单位： | 1.北京大学地球与空间科学学院，北京 100871 2 Center for Space Physics, Boston University，USA 3 IGM, Technische University Braunschweig, Germany 4 中国科学院空间科学与应用研究中心，北京 100080 |
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| 基金项目： | 国家自然科学基金委重点项目 ( 4 983 40 40 )，重大项目 ( 4 0 3 90 15 0 )，国家重大基础科学项目 (G2 0 0 0 0 0 784) |
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| 摘 要： | 讨论了三种根据Cluster Ⅱ四颗卫星的磁场测量数据计算空间电流的方法及其误差，论证了这几种方法的内在一致性，并得到了完全相同的计算结果. 进而依据Cluster Ⅱ 磁场探测资料，计算了2001年1月26日多重磁通量管和FTE事件中高纬磁层顶边界层和磁鞘区的电流密度. 结果表明，磁通量管内电流密度较大，可达到约10-8A/m2；计算精度较高，结果可靠. 本文还应用最小方差分析法（MVA），发现电流方向与通量管的轴向基本一致；论证了电流MVA分析在研究通量管性质时的作用，同时提出了电流管的概念.
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| 关 键 词： | 电流密度 通量管 磁层顶 最小方差分析法 |
| 文章编号： | 0001-5733(2004)04-0555-07 |
| 收稿时间： | 2004-2-17 |
| 修稿时间： | 2004-4-12 |
MULTIPLE FLUX ROPE EVENTS AT THE HIGH-LATITUDE MAGNETOPAUSE ON JANUARY 26, 2001 :CURRENT DENSITY CALCULATING |
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| XIAO Chi Jie,PU Zu Yin,HUANG Zong Ying,FU Sui Yan,XIE Lun,ZONG Qiu Gang,T Fritz,K H Glassmeier,LIU Zhen Xing CAO Jin Bin SHI Jian Kui SHEN Chao LU Li WANG Nai Quan CHEN Tao.MULTIPLE FLUX ROPE EVENTS AT THE HIGH-LATITUDE MAGNETOPAUSE ON JANUARY 26, 2001 :CURRENT DENSITY CALCULATING[J].Chinese Journal of Geophysics,2004,47(4):555-561. |
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| Authors: | XIAO Chi Jie PU Zu Yin HUANG Zong Ying FU Sui Yan XIE Lun ZONG Qiu Gang T Fritz K H Glassmeier LIU Zhen Xing CAO Jin Bin SHI Jian Kui SHEN Chao LU Li WANG Nai Quan CHEN Tao |
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| Institution: | 1.School of Earth and Space Sciences, Peking University, Beijing 100871，China 2 Center for Space Physics, Boston University，725 Commonwealth Avenue, Boston MA 02215, USA 3 IGM, Technische University Braunschweig, Germany 4 Center for Space Science and Application Research, Chinese Academy of Sciences，Beijing 100080, China |
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| Abstract: | A systematic comparison is carried out for three Methods of current density calculating based on simultaneous magnetic field measurements of four-spacecraft Cluster mission. Analytically and numerically demonstrated that within the linear approximation, all these methods lead to the exactly the same results. As a case study, the current density of multiple flux rope events at the high-latitude magnetopause on January 26,2001 is investigated. It is showed that an intense current flows inside the ropes with the current density reaching as high as about 10 -8A/m 2. The current inside rope is valuable for the small relative calculating error. It is also found that the directory of current is almost parallel the axis of flux rope gotten by magnetic minimum variance analysis (MVA). It is supposed the current MVA method is useful and simply for the rope axis orientation. |
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| Keywords: | Current density Flux rope Magnetopause boundary layer Maximum/Minimum variation analy-sis |
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