Ultralow Frequency Waves in the Era of Solar Terrestrial Prediction

日地预报时代的超低频波

• 批准号: 9820106
• 负责人: Margaret Kivelson
• 金额: $ 29万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-05-15 至 2002-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9820106&HistoricalAwards=false
• 关键词: Ultralow; Frequency; Waves; Era; Solar

This project will examine several important topics in ULF wave theory. These waves have periods that range from about 0.5 seconds to 10s of minutes. Five specific major topics will be addressed: (1) the damping of low azimuthal wave-number Alfven waves in the ionosphere, (2) frequency doubled compressional waves in the ring current, (3) giant pulsations, (4) the relationship of Pi2 pulsations to magnetospheric flow bursts and substorm onets, and (5) phase skipping in quasi-monochromatic wave. All these topics involve the interaction of waves and particles in either the magnetosphere of the ionosphere. Understanding these phenomena may lead to new ways of using ULF waves as a method of remote sensing of magnetopsheric phenomena.

本计画将探讨超低频波理论中的几个重要课题。 这些波的周期从0.5秒到10秒不等。 将讨论五个具体的主要课题：（1）电离层中低方位波数阿尔芬波的衰减，（2）环电流中的倍频压缩波，（3）巨脉动，（4）Pi 2脉动与磁层流动爆发和亚暴爆发的关系，以及（5）准单色波中的相位跳跃。 所有这些主题都涉及波和粒子在磁层或电离层中的相互作用。 了解这些现象可能会导致使用超低频波作为磁层现象遥感方法的新途径。