Development of Models of Electron Density in the Magnetosphere from Ground and Satellite-Based Radio Data

根据地面和卫星无线电数据开发磁层电子密度模型

• 批准号: 8720411
• 负责人: Donald Carpenter
• 金额: $ 13.5万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-02-01 至 1991-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8720411&HistoricalAwards=false
• 关键词: Development; Models; Electron; Density; Magnetosphere

The purpose of this grant is for the development and interpretation of empirical models of electron density in the equatorial plane of the earth's magnetosphere. When available, these models will provide a substantially improved basis for studies of magnetospheric convection, wave-particle interactions, and plasma interchange between the magnetosphere and ionosphere. The models would be based primarily upon a combination of results from whistlers recorded be Stanford University at Antarctic stations and from the University of Iowa Plasma Wave Experiment Sweep Frequency Receiver on the ISEE-1 satellite. Magnetospheric research has reached a point of increasing emphasis upon the development of theoretical and empirical models of the plasma distribution and dynamics, an example of this emphasis being the October 1986 Huntsville Workshop on Magnetosphere-Ionosphere Plasma Models. Among the magnetospheric plasma parameters which one can model empirically, equatorial electron density neq now appears to be one of the most important and most accessible. This parameter is of scientific interest for many reasons. It depends upon a number of fundamental physical processes that are difficult to observe, such as solar wind induced convection and relate substorm morphology and the interchange of ionization with the spatially and temporally variable ionosphere. neq represents the equatorial propagation medium and hence the conditions on wave refractive index under which resonant wave particle interactions take place, including particle scattering from the radiation belts. The equatorial plasma is also an important part of the medium through which ULF waves must propagate in carrying energy form either the solar wind or the magnetopause regions where wave-particle interactions may be modulated at ULF frequencies.

该补助金的目的是发展和 电子密度经验模型的解释 地球磁层的赤道平面。 如果可以的话， 这些模型将为以下方面提供实质性改进的基础： 磁层对流、波粒相互作用、 以及磁层和电离层之间的等离子体交换。 这些模式将主要基于各种结果的组合 南极洲斯坦福大学记录的哨声 爱荷华州大学等离子体波实验 ISEE-1卫星上的扫频接收机。 磁层研究已经达到了一个不断增长的点， 强调理论和经验模型的发展 等离子体分布和动力学的一个例子， 重点是1986年10月亨茨维尔研讨会， 磁层-电离层等离子体模型。 在磁层中 等离子体参数，其中一个可以模拟经验，赤道 电子密度neq现在看来是最重要的 也是最容易接近的 这个参数具有科学意义 有很多原因 这取决于一些基本的 难以观察的物理过程，如太阳能 风引起的对流和相关的亚暴形态以及 电离与空间和时间的交换 可变电离层 neq代表赤道传播 介质，因此条件下的波折射率 发生哪些共振波粒子相互作用，包括 辐射带的粒子散射 赤道 等离子体也是超低频传播介质的重要组成部分， 波必须以携带能量的方式传播， 风或磁层顶区域， 可以在ULF频率下调制。