GNSS scintillation: detection, forecasting and mitigation

GNSS 闪烁：检测、预测和缓解

• 批准号: EP/H003304/1
• 负责人: Cathryn Mitchell
• 金额: $ 55.31万
• 依托单位: University of Bath
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2010
• 资助国家: 英国
• 起止时间: 2010 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FH003304%2F1
• 关键词: GNSS; scintillation; detection; forecasting; mitigation

Although GNSS systems now underpin a significant part of modern infrastructure, such as financial markets, telecoms, power generation and distribution as well as transport and emergency services, they suffer from a number of known vulnerabilities. One such shortcoming relates to an ionospheric disturbance known as scintillation. The phenomenon of scintillation is familiar to most people through the twinkling of star light as it crosses the atmosphere. Ionospheric scintillation causes amplitude and phase variations on signals from GNSS satellites when they cross the ionised upper atmosphere (the ionosphere). Currently, GNSS receivers are not robust against radio scintillation; effects range from degradation of positioning accuracy to the complete loss of signal tracking. During scintillation events, required levels of accuracy and continuity, as well as availability, may not be met, thus compromising commercial operations, such as maritime navigation, geophysical exploration and airplane navigation during airport precision approach. The project will quantify the problem of ionospheric scintillation over the forthcoming solar maximum (2010-2013) and develop algorithms to reduce the impact on the users. The research will lead to improved GNSS receiver design that will enable robust performance of receivers that are compromised by effects of the natural environment through ionospheric scintillation.

虽然全球导航卫星系统现在是金融市场、电信、发电和配电以及运输和应急服务等现代基础设施的重要组成部分，但它们存在一些已知的脆弱性。其中一个缺点与称为闪烁的电离层扰动有关。闪烁现象是大多数人熟悉的星星光闪烁，因为它穿过大气层。电离层闪烁会在GNSS卫星穿过电离高层大气（电离层）时引起信号的幅度和相位变化。目前，全球导航卫星系统接收器对无线电闪烁的抵抗能力不强;其影响从定位精度下降到信号跟踪完全丧失。在闪烁事件期间，可能无法满足所需的准确性和连续性以及可用性水平，从而影响商业运营，例如海上导航、地球物理勘探和机场精确进近期间的飞机导航。该项目将量化即将到来的太阳活动高峰期（2010-2013年）电离层闪烁问题，并制定算法以减少对用户的影响。这项研究将改进全球导航卫星系统接收器的设计，使接收器能够在受到电离层闪烁造成的自然环境影响的情况下保持稳健的性能。

项目成果

Imaging the topside ionosphere and plasmasphere with ionospheric tomography using COSMIC GPS TEC

• DOI: 10.1002/2015ja021561
• 发表时间: 2016-01
• 期刊: Journal of Geophysical Research: Space Physics
• 作者: Talini Pinto Jayawardena;A. Chartier;P. Spencer;C. Mitchell

Identification of scintillation signatures on GPS signals originating from plasma structures detected with EISCAT incoherent scatter radar along the same line of sight.

• DOI: 10.1002/2016ja023271
• 发表时间: 2017-01
• 期刊: Journal of geophysical research. Space physics
• 作者: Forte B;Coleman C;Skone S;Häggström I;Mitchell C;Da Dalt F;Panicciari T;Kinrade J;Bust G
• 通讯作者: Bust G

GPS satellite oscillator faults mimicking ionospheric phase scintillation

• DOI: 10.1007/s10291-011-0247-3
• 发表时间: 2012-10-01
• 期刊: GPS SOLUTIONS
• 影响因子: 4.9
• 作者: Benton, Christopher J.;Mitchell, Cathryn N.
• 通讯作者: Mitchell, Cathryn N.

Further observations of GPS satellite oscillator anomalies mimicking ionospheric phase scintillation

• DOI: 10.1007/s10291-013-0338-4
• 发表时间: 2014-07-01
• 期刊: GPS SOLUTIONS
• 影响因子: 4.9
• 作者: Benton, Christopher J.;Mitchell, Cathryn N.
• 通讯作者: Mitchell, Cathryn N.

A comparison of the relative effect of the Earth's quasi-DC and AC electric field on gradient drift waves in large-scale plasma structures in the polar regions

地球准直流和交流电场对极地大尺度等离子体结构梯度漂移波的相对影响比较

• DOI: 10.1002/2016ja022676
• 发表时间: 2016
• 期刊: Space Physics
• 作者: Burston R