The occurrence and wave properties of H+-, He+-, and O+-band EMIC waves observed by the Van Allen Probes
The occurrence and wave properties of H+-, He+-, and O+-band EMIC waves observed by the Van Allen Probes
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DOI：
10.1002/2015ja021358
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发表时间：
2015-09-01
影响因子：
2.8
通讯作者：
Jordanova, V. K.
中科院分区：
文献类型：
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作者：
Saikin, A. A.;Zhang, J. -C.;Jordanova, V. K.
我们对范艾伦探测器任务检测到的电磁离子回旋加速器 (EMIC) 波进行了统计研究，以研究其发生、波功率、椭圆率和法线角的空间分布。我们使用了范艾伦探测器来探索内部磁层（1.1 至 5.8 R-E）。范艾伦探测器上的电场和磁场仪器套件和综合科学的磁场测量用于识别任务运行前 22 个月（2012 年 9 月 8 日至 2014 年 6 月 30 日）的 EMIC 波事件。 EMIC 波在 H+、He+ 和 O+ 波段进行检查。已在三个不同波段（265H(+)波段事件、438 He+波段事件和68个O+波段事件）上识别了超过700个EMIC波事件。在 L=2-8 之间观察到 EMIC 波事件，在 L=4 以下观察到超过 140 个 EMIC 波事件。结果表明，H+波段EMIC波有两个峰值磁本地时间（MLT）发生区域：午前（09:00）
We perform a statistical study of electromagnetic ion cyclotron (EMIC) waves detected by the Van Allen Probes mission to investigate the spatial distribution of their occurrence, wave power, ellipticity, and normal angle. The Van Allen Probes have been used which allow us to explore the inner magnetosphere (1.1 to 5.8 R-E). Magnetic field measurements from the Electric and Magnetic Field Instrument Suite and Integrated Science on board the Van Allen Probes are used to identify EMIC wave events for the first 22months of the mission operation (8 September 2012 to 30 June 2014). EMIC waves are examined in H+, He+, and O+ bands. Over 700 EMIC wave events have been identified over the three different wave bands (265H(+)-band events, 438 He+-band events, and 68 O+-band events). EMIC wave events are observed between L=2-8, with over 140 EMIC wave events observed below L=4. Results show that H+-band EMIC waves have two peak magnetic local time (MLT) occurrence regions: prenoon (09:00