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2001年9月15日Cluster卫星对电流片的观测研究
Alternative TitleCurrent Sheet Structure and Motion Observed by Cluster on September 15,2001
雷建国; 路立; 李中元; 刘振兴; Balogh; A H. Me; R Amp; 北京8701信箱
Department空间天气学国家重点实验室
Source Publication空间科学学报
2006
Volume26Issue:1Pages:21-27
ISSN0254-6124
Language中文
Keyword电流片 cluster 磁场重联 电流片摆动
Abstract2001年9月15日0430-0515UT期间,Cluster卫星多次穿越磁尾电流片.由FGM,CIS等仪器获得了电流片磁场,粒子速度等数据变化情况,并得到了磁尾高速流的两次明显反转.本文采用GSM坐标系.利用求磁场空间梯度张量的方法获得了越尾电流,其电流密度的峰值为28nA/m^2.并对电流片在垂直方向上的摆动和在晨昏方向的波动现象进行了分析.数据显示此时电流片为薄电流片并有一个变薄的趋势,其厚度大约为0.20-3Re.磁场重联时地向流与尾向流均超过了1000km/s,并测得了电流片的法线方向和运动速度,从而得到了磁尾电流片的结构和运动情况.
Other AbstractMultiple crossings of the neutral sheet were observed by the Flux Gate Magnetometer(FGM) and the Cluster Ion Spectrometry experiment (CIS) onboard the Cluster II at(-19,4,-1) Refrom 0430 UT to 0515 UT on September 15,2001.The high-speed proton flow, which reversed from tailward to Earthward, was detected during the multi-crossings.Using a linear gradient/curl estimator technique the cross-tail current was obtained.The peak of the current density reached 28 nA/m2.A large-scale wave propagating duskward and the thin current sheet flapping in the vertical direction were investigated, the thickness of the current sheet ranged from 0.3 Re to 0.2 Re,and had a tendency of being thinner.The velocity of the proton bulk flow in the } direction exceeded 1000 km/s during the magnetic field reconnection. By using the mufti-point timing analysis and Minimum Variance Analysis, the structure and motion of the magnetotail current sheet were estimated.
Indexed ByCSCD
Funding Project中国科学院空间科学与应用研究中心
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1302
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
雷建国,路立,李中元,等. 2001年9月15日Cluster卫星对电流片的观测研究[J]. 空间科学学报,2006,26(1):21-27.
APA 雷建国.,路立.,李中元.,刘振兴.,Balogh.,...&北京8701信箱.(2006).2001年9月15日Cluster卫星对电流片的观测研究.空间科学学报,26(1),21-27.
MLA 雷建国,et al."2001年9月15日Cluster卫星对电流片的观测研究".空间科学学报 26.1(2006):21-27.
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