SENTINEL: GNSS SErvices Needing Trust In Navigation, Electronics, Location & timing

GPS系统是目前唯一全面运行的全球导航卫星系统（GNSS）。自三十多年前诞生以来，全球导航卫星系统的应用已经大大增长。这个曾经只被军方使用和负担得起的系统，已经发展到一种无处不在的技术，现在被认为是理所当然的。然而，用于获取位置和时间的GNSS系统现在正被用于需要可信输出的应用中。在这些应用中，需要了解GNSS的完整性，以便能够依赖它们。这些应用包括：电信网络的定时、智能电网的运行、金融交易和执法。由于GNSS非常容易受到故意、恶意和无意的干扰和干扰，因此要求服务的完整性。欺骗GPS接收器给出错误位置和时间信息的更复杂的方法正在开发中（称为欺骗）。这些方法正越来越多地被用于犯罪（例如，盗窃车辆）和危害人类生命（例如，错误地向紧急服务车辆通报其在道路网络上的位置）。该项目将研究检测、量化和定位GNSS信号异常的技术。这项研究是朝着能够提供GNSS完整性监测服务的广域传感器网络迈出的关键一步，从而将GNSS转变为任务和安全关键应用的可信服务。具体而言，本项目将：1)分析用于位置和时间的GNSS设备的冲击干扰。例如，某些应用，如电信授时设备，可能比那些需要精确定位的应用更能容忍干扰。2)开发用于检测和表征高水平干扰源的算法、方法和设备。例子包括故障设备和高功率故意干扰装置的无线电发射。3)开发低水平干扰源检测和表征的算法、方法和设备。例子包括发射类似GNSS信号的低功率干扰设备。4)开发干扰源定位的算法、方法和设备。这里的重点是开发可以大量部署的低成本设备。

The GPS system is currently the only fully-operational Global Navigation Satellite System (GNSS). Since its inception over thirty years ago applications for GNSS have grown enormously. What was once a system primarily used and affordable only by the military has progressed to the point where it is a ubiquitous technology whose use is now taken for granted. However, GNSS systems used for deriving position and time are now finding their way into applications where the outputs are required to be trusted. Knowledge of the integrity of GNSS is required in these applications in order that they are able to be relied upon. Such applications include: timing in telecommunication networks, operation of smart electricity grids, financial transactions and law enforcement. Integrity of service is required because GNSS is very susceptible to wilful, malicious and unintentional jamming and interference. Ever more sophisticated ways of deceiving GPS receivers into giving false position and timing information are being developed (known as spoofing ). These methods are being increasingly used to commit crimes (e.g., vehicle theft) and endanger human lives (e.g., misinforming emergency-services vehicles of their position on the road network). This project will research techniques that will detect, quantify and locate GNSS signal anomalies. This research is a key step towards a wide-area network of sensors able to provide a GNSS integrity monitoring service thereby transforming GNSS into a trusted-service for mission- and safety-critical application.Specifically this project will:1) Analyse the impact jamming on GNSS devices used for position and time. For example some applications such as telecommunications timing devices may be more tolerant of jamming than those where precision positioning is required.2) Develop algorithms, methods and equipment for the detection and characterization of high-level interference sources. Examples include radio emission from malfunctioning equipment and high-power intentional jammer devices.3) Develop algorithms, methods and equipment for the detection and characterization of low-level interference sources. Examples include low-power jammer devices emitting GNSS like signals.4) Develop algorithms, methods and equipment for the localisation of interference sources. The emphasis here is the development of low-cost devices that can be deployed in large quantities.