Determining the full magnetic field gradient from two spacecraft measurements under special constraints

	Determining the full magnetic field gradient from two spacecraft measurements under special constraints
	Shen, C.; Rong, Z. J.; Dunlop, M.
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2012
卷号	117 页码:A10217
ISSN号	2169-9380
通讯作者	Shen, C (reprint author), Chinese Acad Sci, State Key Lab Space Weather, Ctr Space Sci & Appl Res, 1 Nanertiao, Beijing 100190, Peoples R China.
中文摘要	In this exploration, it is revealed for the first time that the full magnetic field gradient and current density distribution can be derived from two spacecraft magnetic field measurements under the assumptions that the magnetic field is approximately stationary and force-free, conditions which are particularly relevant to low altitude regions of the Earth's magnetosphere and in the regions containing the field aligned current systems. The magnetic field gradients along the spacecraft line, spacecraft velocity direction and the normal direction can be defined so that the full magnetic field gradient tensor is determined, projected into any coordinate system. One test for an ideal situation has been made, which confirms the validity of this approach with very high accuracy. This method can be applied to the determination of the magnetic field gradient tensor and current density for the forthcoming multispacecraft Swarm mission.
英文摘要	In this exploration, it is revealed for the first time that the full magnetic field gradient and current density distribution can be derived from two spacecraft magnetic field measurements under the assumptions that the magnetic field is approximately stationary and force-free, conditions which are particularly relevant to low altitude regions of the Earth's magnetosphere and in the regions containing the field aligned current systems. The magnetic field gradients along the spacecraft line, spacecraft velocity direction and the normal direction can be defined so that the full magnetic field gradient tensor is determined, projected into any coordinate system. One test for an ideal situation has been made, which confirms the validity of this approach with very high accuracy. This method can be applied to the determination of the magnetic field gradient tensor and current density for the forthcoming multispacecraft Swarm mission.
学科主题	空间物理
收录类别	SCI
资助信息	Ministry of Science and Technology of China [2011CB811404]; National Natural Science Foundation of China [41231066, 40974101, 41104114]; China Postdoctoral Science Foundation [20100480446]; ESA SSVO [10112]; Chinese Academy of Sciences (CAS) [2009S1-54]; Specialized Research Fund for State Key Laboratories of the CAS
语种	英语
公开日期	2014-12-15
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/3176]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Shen, C.,Rong, Z. J.,Dunlop, M.. Determining the full magnetic field gradient from two spacecraft measurements under special constraints[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2012,117:A10217.
APA	Shen, C.,Rong, Z. J.,&Dunlop, M..(2012).Determining the full magnetic field gradient from two spacecraft measurements under special constraints.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,117,A10217.
MLA	Shen, C.,et al."Determining the full magnetic field gradient from two spacecraft measurements under special constraints".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 117(2012):A10217.