Collaborative Research: CEDAR: Comparative Investigation of Kilometer-scale Auroral E and F Region Irregularities with a Global Positioning System (GPS) Scintillation Array

合作研究：CEDAR：使用全球定位系统 (GPS) 闪烁阵列对公里级极光 E 和 F 区域不规则现象进行比较研究

• 批准号: 1651466
• 负责人: Donald Hampton
• 金额: $ 4.87万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-09-01 至 2021-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1651466&HistoricalAwards=false
• 关键词: Collaborative; Research; CEDAR; Comparative; Investigation

Ionospheric irregularities diffract and refract radio waves. These effects present as Global Positioning System (GPS) signal phase and/or amplitude scintillation. The proposed activities consist of analyzing ionospheric irregularities sensed by a GPS scintillation array at the Poker Flat Research Range (PFRR) in Alaska that can resolve horizontal scales as small as 10 km. The Principal Investigators (PIs) will recover properties of the plasma structures such as electron content, drift velocity, and the horizontal dimensions of the irregularities. A primary research goal is to use the spatial structuring information to characterize the E- and F-region turbulence energy cascades. These tasks will clarify whether turbulence explains observed GPS scintillations, and enhance understanding of the role of turbulence in magnetosphere-ionosphere coupling. Broader impacts include career development of 2 junior faculty - at least one of them female - and graduate student support. This research is also highly pertinent to the National Space Weather Action Plan. During extreme events, the E- and F-region irregularities that are the focus of this research's science can migrate to lower latitudes and significantly affect communications and navigation systems. Through its support and utilization of GPS, radio and optical data, this research maintains observational capability for space-weather operations.

电离层的不规则性绕射和折射无线电波。这些影响表现为全球定位系统(GPS)信号的相位和/或幅度闪烁。拟议的活动包括分析位于阿拉斯加扑克平原研究靶场的全球定位系统闪烁阵列探测到的电离层不规则性，该阵列可以分辨出小至10公里的水平尺度。首席调查员(PI)将恢复等离子体结构的性质，如电子含量、漂移速度和不规则的水平尺寸。一个主要的研究目标是利用空间结构信息来表征E区和F区的湍流能量级联。这些任务将澄清湍流是否解释观测到的GPS闪烁，并加强对湍流在磁层-电离层耦合中的作用的理解。更广泛的影响包括两名初级教员的职业发展--其中至少有一名女性--以及研究生支持。这项研究也与国家空间天气行动计划高度相关。在极端事件期间，E区和F区的不规则性是这项研究科学的重点，可能会迁移到较低的纬度，并显著影响通信和导航系统。通过对全球定位系统、无线电和光学数据的支持和利用，这项研究保持了空间气象作业的观测能力。