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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Westward tilt of low-latitude plasma blobs as observed by the Swarm constellation
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Westward tilt of low-latitude plasma blobs as observed by the Swarm constellation

机译：向西倾斜的低纬度等离子团观察到蜂群星座

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摘要

In this study we investigate the three-dimensional structure of low-latitude plasma blobs using multi-instrument and multisatellite observations of the Swarm constellation. During the early commissioning phase the Swarm satellites were flying at the same altitude with zonal separation of about 0.5° in geographic longitude. Electron density data from the three satellites constrain the blob morphology projected onto the horizontal plane. Magnetic field deflections around blobs, which originate from field-aligned currents near the irregularity boundaries, constrain the blob structure projected onto the plane perpendicular to the ambient magnetic field. As the two constraints are given for two noncoplanar surfaces, we can get information on the three-dimensional structure of blobs. Combined observation results suggest that blobs are contained within tilted shells of geomagnetic flux tubes, which are similar to the shell structure of equatorial plasma bubbles suggested by previous studies.
机译：在这项研究中我们调查三维低纬度等离子团使用的结构multi-instrument和多卫星观测群的星座。调试阶段,群卫星飞行的高度与纬向分离地理经度的约0.5°。密度三个卫星的数据约束blob形态投射到水平的飞机。这源自field-aligned电流附近吗不规则边界,限制blob结构投射到平面垂直周围的磁场。给出了两个noncoplanar约束表面,我们可以得到的信息气泡的三维结构。观察结果表明,气泡包含在倾斜的地磁的外壳磁流管中,类似于壳赤道等离子体泡沫结构建议先前的研究。

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