Cassini Plasma Spectrometer Electron Spectrometer measurements during the Earth swing-by
Cassini Plasma Spectrometer Electron Spectrometer measurements during the Earth swing-by
复制标题
卡西尼等离子体能谱仪 电子能谱仪在地球绕转期间进行测量
DOI：
10.1029/2001ja900087
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发表时间：
2001
影响因子：
--
通讯作者：
D. Young
中科院分区：
文献类型：
--
作者：
A. Coates;K. Svenes;G. Abel;D. Linder;B. T. Narheim;M. Thomsen;D. Young
1999年8月18日，卡西尼号在飞往土星的途中飞越地球。卡西尼号地球绕转是迄今为止最快的地球磁层穿越。航天器以 9.1 R-E hr(-1) (16.1 km s(-1)) 速度行驶，并快速穿越了地球磁层的几个区域。在卡西尼号地球绕转期间，电子能谱仪 (ELS) 收集了近 9 小时的地球磁层数据和近 10 小时的地球上游太阳风数据。在穿越过程中，卡西尼号ELS对太阳风、弓形激波、磁鞘、磁层顶、辐射带、等离子体层、等离子体片、波瓣和尾部磁层顶交叉点中的电子进行了采样。本文的目的是 (1) 总结电子观测结果，包括磁气层边界交叉点的位置，以及 (2) 评估 ELS 在遇到的截然不同的等离子体状态下进行测量时如何发挥作用。结果显示与之前的观察结果基本一致，但有一些例外。除了预期的结果之外，我们还提供了等离子体片中低能场对准光束的证据以及白天和夜间等离子体层顶位置不对称的证据。还介绍了太阳风、磁鞘和等离子体片的密度和温度的初步计算。
On August 18, 1999, Cassini flew by the Earth on its way to Saturn. The Cassini Earth swing-by was the fastest traversal of the Earth's magnetosphere to date. The spacecraft was traveling at 9.1 R-E hr(-1) (16.1 km s(-1)) and made rapid traversals of several regions of the terrestrial magnetosphere. During the Cassini Earth swing-by the Electron Spectrometer (ELS) collected almost 9 hours of data in the Earth's magnetosphere and almost 10 hours of solar wind data upstream of the Earth. During the pass, Cassini ELS sampled electrons in the solar wind, bow shock, magnetosheath, magnetopause, radiation belts, plasmasphere, plasma sheet, lobes, and crossings of the tail magnetopause. The purpose of this paper is (1) to give a summary of electron observations including the locations of magnetosphere boundary crossings and (2) to assess how the ELS is functioning as it takes measurements in the greatly differing plasma regimes encountered. Results are shown to be mainly consistent with previous observations with a few exceptions. In addition to anticipated results we present evidence of a low-energy field-aligned beam in the plasma sheet and evidence of asymmetry on the dayside and nightside plasmapause position. Preliminary calculations of density and temperature for the solar wind, magnetosheath, and plasma sheet are also presented.