Simultaneous field-aligned currents at Swarm and Cluster satellites
Simultaneous field-aligned currents at Swarm and Cluster satellites
复制标题
Swarm 和 Cluster 卫星上的同步场对准电流
DOI：
10.1002/2015gl063738
复制
发表时间：
2015
影响因子：
5.2
通讯作者：
Haagmans R.
中科院分区：
文献类型：
--
作者：
Dunlop M. W.;Yang J. -Y.;Yang Y. -Y.;Xiong C.;Luehr H.;Bogdanova Y. V.;Shen C.;Olsen N.;Zhang Q. -H.;Cao J. -B.;Fu H. -S.;Liu W. -L.;Carr C. M.;Ritter P.;Masson A.;Haagmans R.
我们第一次显示，直接，多航天器计算电流密度，和其他方法，匹配的签名场向电流（FACs）同时采样附近的电离层在低（~500公里高度）轨道和磁层在中等（~ 2.5RE高度）轨道使用一个特定的群和集群连接。通过地面/磁层足迹的联合测绘和极光带边界的估计（作为区域1和区域2电流边界的指示），对星团特征进行了解释和排序。我们发现了小规模和大规模FACs的明确证据，以及Cluster和Swarm大规模电流行为和结构的明确匹配。该方法通过Cluster和Swarm的联合操作成为可能，其中包含在Swarm操作的前几个月中，一些紧密的三航天器配置。
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 (~500 km altitude) orbit and in the magnetosphere at medium (~2.5REaltitude) 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.