基于PPP技术的实时时间频率传递方法性能评估

Performance evaluation of real time time frequency transfer method based on GNSS PPP method

基于载波相位观测数据的静态精密单点定位技术(PPP)已成为高精度时间频率传递的关键技术之一。随着卫星轨道和钟差改正数播发技术的发展,基于PPP的实时高精度时间频率传递技术成为时间频率领域研究热点之一,具有全球性、高精度、低成本等优点,可实现高精度、远距离、实时时间频率传递。论文研究了基于PPP技术的实时时间频率传递方法,开展了共氢原子钟的零基线时间频率传递实验和武汉-咸宁长基线时间频率传递实验。实验结果表明,共钟零基线情况下实时时间传递误差的峰峰值小于0.37 ns(标准差54 ps),实时频率传递稳定度为8.20×10^(-16)/32768 s;长基线情况下实时时间传递误差的峰峰值小于0.89 ns(标准差0.13 ns),实时频率传递稳定度为9.35×10^(-16)/65536 s。

Static precise point positioning(PPP)based on carrier phase observation data has become one of the key techniques for high precision time and frequency transfer.With the development of satellite orbit and clock products broadcast technology,real time high precision time and frequency transfer based on PPP,which has the advantages of global,high precision and low cost,has become the research hotspots in the field of time and frequency transfer,and it can realize long distance,high precision,real time time and frequency transfer.In this paper,a real time time and frequency transfer method based on PPP technology is studied,and zero baseline time frequency transfer experiments are carried out with a common active hydrogen clock,as well as the long baseline experiments between Wuhan city and Xianning city with two different active hydrogen clock.The experimental results show that the peak to peak value of zero baseline real time time transfer error is less than 0.37 ns in the case of common clock,and the stability of real time frequency transfer is 8.20×10^(-16)/32768 s.The peak to peak value of real time time transfer error of long baseline between Wuhan city and Xianning city is less than 0.89 ns,and the stability of real time frequency transfer is 9.35×10^(-16)/65536 s。