Field line resonances associated with MHD waveguides in the magnetosphere
Field line resonances associated with MHD waveguides in the magnetosphere
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DOI：
10.1029/92gl00116
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发表时间：
1992-03
影响因子：
5.2
通讯作者：
J. Samson;B. Harrold;J. Ruohoniemi;R. Greenwald;A. Walker
中科院分区：
文献类型：
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作者：
J. Samson;B. Harrold;J. Ruohoniemi;R. Greenwald;A. Walker
约翰霍普金斯大学/鹅湾应用物理实验室的高频雷达经常看到F区漂移或电场，这与地球磁层中的场线共振有关。这些共振出现在从当地午夜到早晨的时间间隔内，并且具有离散的、依赖于纬度的频率，大约为1.3、1.9、2.6-2.7和3.2-3.4 mHz。我们表明，这些频率是兼容的MHD波导模式，与antisunward的传播和反射在磁层顶和偶极场线上的转折点。
The Johns Hopkins University/Applied Physics Laboratory HF radar at Goose Bay often sees F-region drifts or electric fields which are associated with field line resonances in the Earth's magnetosphere. These resonances are seen in the interval from local midnight to morning, and have discrete, latitude-dependent frequencies at approximately 1.3, 1.9, 2.6–2.7, and 3.2–3.4 mHz. We show that these frequencies are compatible with MHD waveguide modes, with antisunward propagation and reflection at the magnetopause and at turning points on dipolar field lines.