Simultaneous field-aligned currents at Swarm and Cluster satellites

被引：33

作者：

Dunlop, M. W. ^{[1
,2
,3
]}

Yang, J. -Y. ^{[1
,4
]}

Yang, Y. -Y. ^{[5
,6
]}

Xiong, C. ^{[7
]}

Luehr, H. ^{[7
]}

Bogdanova, Y. V. ^{[2
]}

Shen, C. ^{[5
]}

Olsen, N. ^{[8
]}

Zhang, Q. -H. ^{[9
]}

Cao, J. -B. ^{[1
]}

Fu, H. -S. ^{[1
]}

Liu, W. -L. ^{[1
]}

Carr, C. M. ^{[3
]}

Ritter, P. ^{[7
]}

Masson, A. ^{[10
]}

Haagmans, R. ^{[10
]}

机构：

[1] Beihang Univ, Sch Astronaut, Space Sci Inst, Beijing 100191, Peoples R China

[2] STFC, RAL Space, Chilton, England

[3] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London, England

[4] Chinese Acad Sci, Key Lab Earth & Planetary Phys, Beijing, Peoples R China

[5] Chinese Acad Sci, State Key Lab Space Weather, NSSC, Beijing, Peoples R China

[6] Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China

[7] GFZ, Potsdam, Germany

[8] DTU Space, Lyngby, Denmark

[9] Shangdong Univ, Inst Space Sci, CSW, Weihai, Peoples R China

[10] ESA ESTEC, Noordwijk, Netherlands

来源：

GEOPHYSICAL RESEARCH LETTERS | 2015年 / 42卷 / 10期

关键词：

field-aligned currents; multispacecraft analysis; AURORAL OVAL; MAGNETIC DISTURBANCES; CURRENT SIGNATURES; 1100; KILOMETERS; MODEL; MISSION; CONSTELLATION;

D O I：

10.1002/2015GL063738

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We show for the first time, with direct, multispacecraft calculations of electric current density, and other methods, matched signatures of field-aligned currents (FACs) sampled simultaneously near the ionosphere at low (similar to 500km altitude) orbit and in the magnetosphere at medium (similar to 2.5 R-E altitude) orbits using a particular Swarm and Cluster conjunction. The Cluster signatures are interpreted and ordered through joint mapping of the ground/magnetospheric footprints and estimation of the auroral zone boundaries (taken as indication of the boundaries of Region 1 and Region 2 currents). We find clear evidence of both small-scale and large-scale FACs and clear matching of the behavior and structure of the large-scale currents at both Cluster and Swarm. The methodology is made possible through the joint operations of Cluster and Swarm, which contain, in the first several months of Swarm operations, a number of close three-spacecraft configurations.

引用

页码：3683 / 3691

页数：9

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