Theory and Modeling of Discrete Auroral Radio Emissions

离散极光无线电发射的理论和建模

• 批准号: 0638638
• 负责人: Peter Yoon
• 金额: --
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-04-15 至 2009-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0638638&HistoricalAwards=false
• 关键词: Theory; Modeling; Discrete; Auroral; Radio

Observations of radio waves in the Earth's plasma environment, characterized by a discrete rather than continuous frequency pattern, are described with theoretical discrete eigenmodes trapped within a plasma with density structuring. Originally applied for modeling or auroral radio waves (auroral roar), the theory is here extended to describe auroral kilometric radiation (AKR), characterized by fine frequency structure, kilometric continuum radiation, and other in-situ observations of discrete radio emissions at F-region altitudes. This research stresses investigation of AKR fine-structure, described as electrostatic eigenmodes that mode-converted to electromagnetic waves, that can be detected at a distance from the source.

对地球等离子体环境中无线电波的观测，以离散而非连续的频率模式为特征，用密度结构等离子体中捕获的理论离散特征模式进行了描述。最初应用于极光无线电波（极光咆哮）的建模，该理论在这里被扩展到描述极光千米辐射（AKR），其特征是精细的频率结构，千米连续辐射，以及其他在f区域高度的离散无线电发射的原位观测。本研究着重于AKR精细结构的研究，该结构被描述为静电特征模式，该模式转换为电磁波，可以在距离源一定距离的地方检测到。