EAGER: Investigation of High Precision Spaced GPS Measurement of Ionospheric Drift at Polar Latitudes

EAGER：极地纬度电离层漂移高精度间隔 GPS 测量研究

• 批准号: 0936985
• 负责人: Lars Dyrud
• 金额: --
• 依托单位: Center For Remote Sensing Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-06-15 至 2010-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0936985&HistoricalAwards=false
• 关键词: EAGER; Investigation; Precision; Spaced; GPS; EAGER; Investigation; Precision; Spaced; GPS

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).This project will investigate the possibility of using spaced Global Positioning System (GPS) receivers to measure overhead ionospheric drifts in the polar cap and auroral zone. Four high sensitivity and high data rate GPS receivers will be placed at the Poker Flat Rocket Range near Fairbanks, Alaska, and operated for one year. This site was selected for the availability of infrastructure and for coordination with observations from the Poker Flat Incoherent Scatter Radar, which will allow testing and validation of the inferred drifts. The primary goal of the project is to investigate different receiver spatial configurations and operating modes. This will allow cross-correlation of small fluctuations in the measured signal between each receiver in order to derive the overhead ionospheric flow vector. The scientific questions that will be addressed are: 1) At what scale sizes and frequencies are ionospheric structuring and irregularities primarily present in the auroral and polar cap ionosphere, 2) how does this structure relate to measurements of GPS phase, amplitude, and total electron content, and 3) to what extent can these data be used in a spaced receiver configuration to derive not only total electron content and scintillations but ionospheric plasma drift vectors. One broader impact of the project is that, if it's successful, it would provide a new method to measure vector ionospheric drifts at high latitudes that is easily deployable and relatively low cost. Ionospheric drifts are a fundamental space weather parameter directly related to magnetospheric convection and to magnetosphere-ionosphere coupling. A second broader impact is that the GPS receiver data obtained during the experiment will be made freely available to the community and the receivers will be left at Poker Flat as a community resource.

该奖项是根据2009年的《美国回收与再投资法》（公法111-5）资助的。本项目将调查使用间隔的全球定位系统（GPS）接收器来测量极地盖和极光区的高架离子层漂移的可能性。四个高灵敏度和高数据速率GPS接收器将放置在阿拉斯加费尔班克斯附近的扑克平面火箭范围内，并运行一年。选择该站点以提供基础架构的可用性和与扑克平面不连贯散点雷达的观测值的协调，这将允许测试和验证推断的漂移。该项目的主要目标是研究不同的接收器空间配置和操作模式。这将允许每个接收器之间测量的信号中的小波动互相关，以得出开销电离层流量载体。将要解决的科学问题是：1）在什么尺寸和频率下是电离层结构和不规则性，主要存在于极光和极性盖电离层中，2）这种结构与GPS阶段，振幅和总电子内容的测量以及这些数据的总体配置在哪些程度上与何种程度相关的gps阶段的测量以及3）在哪些程度上使用的范围，3）等离子体漂移向量。该项目的一个更广泛的影响是，如果成功的话，它将提供一种新的方法来测量高纬度的矢量电离层漂移，这很容易部署且成本相对较低。电离层漂移是与磁层对流和磁层 - 离子层耦合直接相关的基本空间天气参数。第二个更广泛的影响是，在实验期间获得的GPS接收器数据将免费提供给社区，并且接收器将留在扑克公寓作为社区资源。