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Development of Resilient Time and Frequency Distribution from Low Earth Orbit using Nanosatellites

使用纳米卫星开发近地轨道的弹性时间和频率分布

基本信息

批准号：
10007886
负责人：
金额：
$ 5.79万
依托单位：
SPIRE GLOBAL UK LIMITED
依托单位国家：
英国
项目类别：
Collaborative R&D
财政年份：
2021
资助国家：
英国
起止时间：
2021 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=10007886
关键词：
Development Resilient Time Frequency Distribution

项目摘要

This project will assess the feasibility of an alternative Positioning, Navigation and Timing (aPNT) service with 27/4 global coverage, provided by a large constellation of dedicated Low Earth Orbit (LEO) nanosatellites. Compared to well-established Global Navigation Satellite Systems (GNSS) with satellites in Medium Earth Orbits (MEOs), the distribution of ranging signals from a constellation of nanosatellites in LEO offers a few potential advantages for PNT.It enables the aPNT system to: -- Improve resilience to on-ground intentional and unintentional interference; -- Deliver a redundant PVT solution that can be used to validate and enhance the PVT solution based on GNSSs against spoofing attempts and harsh electromagnetic propagation conditions; -- Provide a back-up PVT solution in case of any global outage due to any system failure (e.g., GPS in January 2016 or Galileo in July 2019, see: https://insidegnss.com/lessons-to-be-learned-from-galileo-signal-outage/); -- Give access to a GNSS-like service in a cost-effective manner by leveraging the ability of nanosatellites to be deployed in a constellation at relatively low cost as well as their capability to exploit already existing GNSS satellites flying at higher-altitude orbits.To assess the feasibility of such aPNT service, the project will study the current state of the art, elaborate the preliminary design and constraints of a cost-effective system, and deploy a laboratory concept demonstration to assess the quality of the aPNT service to the end user receiver on ground..

该项目将评估一种替代性定位、导航和定时服务的可行性，这种服务由一个大型的专用低地球轨道纳米卫星星座提供，全球覆盖率为27/4。与具有中地球轨道卫星的成熟的全球导航卫星系统（GNSS）相比，来自低地球轨道中的纳米卫星星座的测距信号的分布为PNT提供了一些潜在的优势。- 提供冗余PVT解决方案，可用于验证和增强基于GNSS的PVT解决方案，以抵御欺骗企图和恶劣的电磁传播条件;--在由于任何系统故障（例如，2016年1月的GPS或2019年7月的Galileo，参见：https：//insidegnss.com/lessons-to-be-learned-from-galileo-signal-outage/）;--利用纳米卫星以相对较低的成本部署在星座中的能力，以及它们利用现有的在更高高度轨道上飞行的全球导航卫星系统卫星的能力，以具有成本效益的方式提供类似全球导航卫星系统的服务。为了评估这种aPNT服务的可行性，该项目将研究目前的技术水平，详细说明成本效益系统的初步设计和限制，并部署实验室概念演示，以评估向地面最终用户接收器提供的aPNT服务的质量。