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: 1261369
• 负责人: Seebany Datta-Barua
• 金额: $ 10.52万
• 依托单位: Illinois Institute of Technology
• 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: 2012-08-01 至 2017-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1261369&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阿尔伯塔部署一个二维全球定位系统闪烁接收器阵列。在2公里区域内部署大量的全球定位系统闪烁接收器，将能够调查观测到的振幅和相位闪烁的二维空间分布的时间演变。 将把全球定位系统闪烁二维随时间变化观测与电磁波通过随机介质的三维前向传播的综合理论-数值和反向衍射层析成像技术结合起来，以便在地面阵列观测和分析与引起闪烁观测的电离层不规则性的基本物理和结构之间建立定量联系。 此外，数据同化技术将被用来估计大规模梯度的电子密度，风和领域，并与闪烁的结果和极光成像调查到何种程度的知识，大规模的背景电离层提高我们的理解较小的规模结构。