NTOL NPL Timing Over Loran

“NTOL - NPL在eLoran上的时间”项目旨在通过使用位于坎布里亚郡安索恩的eLoran发射机，演示英国国家物理实验室管理的全国弹性时基在英国的广播。NTOL将把Anthorn eLoran发射机直接同步到NPL时基，并通过在英国各个关键国家基础设施（CNI）位置部署eLoran接收器来演示准确的UTC时间传输。目前，CNI部门通常使用GNSS作为接收UTC的方法，但通常意识到由于干扰、干扰、欺骗和空间天气，GNSS信号接收的脆弱性。eLoran是一种高功率地面广播信号，因此不受这些GNSS漏洞的影响，因此使用eLoran广播信号在弹性和鲁棒性方面具有显着优势。此外，国家物理实验室时基的广播提供了一种将UTC传送到完全由英国主权直接控制的CNI应用程序的方法，而GNSS的星座由外国和地区操作。

The "NTOL -- NPL Time Over eLoran" project will aim to demonstrate the broadcast of the UK NPL managed national resilient time-base across the UK by using the eLoran transmitter based at Anthorn in Cumbria. NTOL will synchronise the Anthorn eLoran transmitter directly to the NPL time-base and demonstrate accurate UTC time transfer by deploying eLoran receivers at various Critical National Infrastructure (CNI) locations across the UK. Currently, CNI sectors typically utilise GNSS as the method of receiving UTC but are often aware of the vulnerabilities to GNSS signal reception due to jamming, interference, spoofing and space weather. eLoran is a high-power terrestrial broadcast signal and therefore immune to the effects of these GNSS vulnerabilities, so the use of eLoran broadcast signals provides significant advantages in terms of resiliency and robustness. In addition, the broadcast of the NPL time-base provides a method of delivering UTC to CNI applications that is entirely under direct UK sovereign control, compared to GNSS whose constellations are operated by foreign countries and territories.