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Determining the full magnetic field gradient from two spacecraft measurements under special constraints
Shen, C.; Rong, Z. J.; Dunlop, M.; Shen, C (reprint author), Chinese Acad Sci, State Key Lab Space Weather, Ctr Space Sci & Appl Res, 1 Nanertiao, Beijing 100190, Peoples R China.
Department空间科学部
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2012
Volume117Pages:A10217
ISSN2169-9380
Language英语
AbstractIn 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.; 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.
Indexed BySCI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/3176
Collection空间科学部
Corresponding AuthorShen, C (reprint author), Chinese Acad Sci, State Key Lab Space Weather, Ctr Space Sci & Appl Res, 1 Nanertiao, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Shen, C.,Rong, Z. J.,Dunlop, M.,et al. 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.,&Shen, C .(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.
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