对流层双向时间比对及其时延误差分析

Analysis of Two Way Troposphere Time Transfer and Its Delay Errors

双向时间比对技术广泛应用于高精度时间同步系统中,借鉴卫星双向时间比对和流星余迹双向时间比对原理,本文提出利用对流层散射通信进行双向时间比对的思想。分析对流层散射通信延迟理论及其在高精度时间比对中的重要性,研究对流层双向时间比对技术原理及其时延误差,根据选择的3个观测站的气象数据,详细分析各站在不同计算模型下的延迟误差,并设计了一种多站对流层散射双向时间比对系统。研究表明,在对流层散射双向时间比对中,散射传输时延误差是影响比对精度的最大因素,估计理论上总时延误差在1.2ns左右。

Two way time transfer(TWTT)technique has been widely used in the high resolution synchronization system.The paper puts forth the idea of two way time transfer by taking advantage of troposcatter communication,after referring to the principles of two way satellite time transfer(TWSTT) and two way meteor burst time transfer.It analyzed the delay theory in troposcatter communication and its importance in high resolution time transfer.It studied the principle of two way troposphere time transfer(TWT3)and its delay errors.Besides it analyzed the delay errors of three chose observation stations in details based on their meteorological data in different models and designed a multi static TWT3(MS-TWT3)system.It could be concluded from the research that tropospheric delay error is the main factor to influence the resolution of transfer in TWT3.The total delay errors are estimated to be around 1.2ns in theory.