Studies of Plasma Structure in the Ionosphere Using Scintillation and Tomographic Techniques

使用闪烁和断层扫描技术研究电离层中的等离子体结构

• 批准号: 9121660
• 负责人: Steven Franke
• 金额: $ 30万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-05-15 至 1996-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9121660&HistoricalAwards=false
• 关键词: Studies; Plasma; Structure; Ionosphere; Using

We propose to investigate the ionospheric plasma structures using two techniques: tomographic technique and scintillation technique. Each is summarized in the following. 1. Tomographic technique: Our simulation studies over the past several years, as well as several studies by others, have demonstrated the potential and capability of imaging ionospheric structures of horizontal scales from tens of kilometers to hundreds of kilometers. We propose to set up a network of stations to receive Doppler shifted signals from the navigation satellites NNSS for the purpose of imaging the equatorial ionosphere using the tomographic technique to learn about the dynamics of the equatorial anomaly region. This project has associated tasks in repair and modification of donated JMR geodetic TRANSIT receivers, development of a low-cost PC based data acquisition system, development of receivers at selected field sites, data management and processing, further development of computer algorithm, and data interpretation. 2. Scintillation technique: This project is concerned with analyzing already collected scintillation data at various sites of geophysical interests. One station (Spitzbergen, 77.00oN, 15.55o, geomagnetic dip 73.43oN) is a polar cusp station. The small structures observed by the scintillation technique can be related to the presence of auroras, the configuration of the interplanetary magnetic field, electromagnetic omissions, etc. In the Pacific-Asia region data from a network of stations have been collected to analyze the relation of scintillation with the traveling ionospheric disturbances. At equator the scintillation data can be correlated with the radar data to investigate the relation between ionospheric motions and the production of small ionospheric structures.

我们建议使用 两种技术：层析成像技术和闪烁 法 每一个都总结在下面。 1. 层析成像技术：我们过去的模拟研究 几年来，以及其他人的几项研究， 展示了成像的潜力和能力 电离层结构的水平尺度从几十个 千米到几百千米。 我们建议设立 接收多普勒频移信号的台站网络 从导航卫星NNSS的目的， 成像赤道电离层使用层析成像 技术来了解赤道的动力学 异常区 此项目具有关联的修复任务 和修改捐赠的JMR大地传输接收器， 开发了一种低成本的基于PC的数据采集系统， 在选定的野外地点研制接收器， 管理和处理，计算机的进一步发展 算法和数据解释。 2. 闪烁技术：本项目涉及 分析已经收集的闪烁数据， 地球物理的兴趣点。 一站（Spitzbergen， 77.00oN，15.55o，磁倾角73.43oN）为极尖 站 通过闪烁观察到的小结构 技术可以与极光的存在， 行星际磁场的结构， 在太平洋-亚洲区域 收集了来自台站网络的数据， 分析了闪烁与行波的关系 电离层扰动 在赤道，闪烁数据 可以与雷达数据相关联， 电离层运动与电离层产生之间的关系 小的电离层结构。