Collaborative Research: CEDAR--The Space-time Properties of High Latitude Ionospheric Irregularities by a Two-dimensional Array of GPS Scintillation Receivers

合作研究：CEDAR——通过 GPS 闪烁接收器二维阵列研究高纬度电离层不规则性的时空特性

• 批准号: 1139121
• 负责人: Seebany Datta-Barua
• 金额: $ 10.52万
• 依托单位: San Jose State University Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-02-01 至 2012-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1139121&HistoricalAwards=false
• 关键词: Collaborative; Research; CEDAR; Space; time

The project entails the deployment of a two-dimensional (2D) array of GPS scintillation receivers in Calgary Alberta. The deployment of a large number of GPS scintillation receivers over a 2 km region will allow for the investigation of the temporal evolution of the 2D spatial distribution of observed amplitude and phase scintillations. The 2D time-evolving observations of GPS scintillations will be combined with comprehensive theoretical-numerical 3D forward propagation of electro-magnetic waves through random media, and inverse diffraction tomography techniques to provide quantitative linkage between the observations and analysis of the ground array, and the underlying physics and structuring of the ionospheric irregularities causing the scintillation observations. Furthermore, data assimilative techniques will be used to estimate large scale gradients in electron density, winds and fields, and compared with the scintillation results and auroral imaging to investigate to what degree knowledge of the large scale background ionosphere improves our understanding of smaller scale structuring.

该项目需要在卡尔加里艾伯塔省部署GPS闪烁接收器的二维(2D)阵列。在2公里范围内部署大量全球定位系统闪烁接收器，将能够调查观测到的幅度和相位闪烁的二维空间分布的时间演变。GPS闪烁的2D时间演变观测将与电磁波在随机介质中的全面理论-数值三维正向传播和反向绕射层析成像技术相结合，以提供地面阵列的观测和分析与导致闪烁观测的电离层不规则的基本物理和结构之间的定量联系。此外，数据同化技术将被用来估计电子密度、风和场的大尺度梯度，并与闪烁结果和极光成像相比较，以考察对大尺度背景电离层的了解在多大程度上改善了我们对小尺度结构的理解。