TITUS (TDOA Iridium Technique for UTC(NPL) time transfer and Synchronisation)

TITUS项目将在联合王国开发一种新的定时服务，利用被动监测来自激增的卫星巨型星座的通信信号作为机会信号。TITUS项目提出了一个高度创新的概念，其基础是处理高功率和免费提供的铱信号，这些信号由位于不同位置的低成本传感器接收，并计算各站之间的到达时间差（TDOA）。我们所提出的方法提供了进一步提高时间传递的准确性的前景，超出了实际可用的目标时间精度为几十纳秒相对于UTC（NPL）。

The TITUS project will develop a new timing service over the UK using passive monitoring of communications signals from proliferated satellite mega-constellations as a signal of opportunity. The TITUS project proposes a highly innovative concept based on processing the high power and freely available Iridium signals, which are received at low-cost sensors located at different locations, and the computation of Time Differences of Arrival (TDOA) between the stations. Our proposed approach offers the prospect of further improving the accuracy of time transfer beyond what is actually available targeting time accuracies of tens of nanoseconds with respect to UTC(NPL).