时频传递的改进整数相位钟方法

时频传递的改进整数相位钟方法

吕大千1，曾芳玲1，欧阳晓凤1，于合理2

【摘 要】Abstract： The integer phase clock method is one of the most widely used integer ambiguity resolution method in precise point positioning (PPP). The stability of frequency transfer based on integer phase clock method is better than that of the conventional PPP. However, the clock offsets calculated by integer phase clock method contain the systematic biases, which affect the accuracy of time transfer. In this paper, we introduce the integer phase clock method, and analyze the origin of this systematic bias. Then based on single-difference ambiguity resolution method and atomic-clock refinement, a modified integer phase clock method is proposed. And some experiments are carried out to assess the modified integer phase clock method for ambiguity resolution and time-frequency transfer. The experiment results prove that the modified algorithm can eliminate the systematic bias effectively. The accuracy of time transfer can reach 0.1～0.2 ns, and the stability of frequency transfer can achieve 1.1×10-15/d.

【期刊名称】测绘学报

【年(卷),期】2019(048)007

【总页数】9

【关键词】Key words： precise point positioning；integer phase clock method；integer ambiguity resolution；time and frequency transfer；atomic clock model

引文格式：吕大千，曾芳玲，欧阳晓凤,等.时频传递的改进整数相位钟方法[J].测绘学报

，2019,48(7)：889-897. DOI:10.11947/j.AGCS.2019.20180248.

Lü Daqian,ZENG Fangling,OUYANG Xiaofeng,et al.Time and frequency transfer based on modified integer phase clock method[J]. Acta Geodaetica et Cartographica

Sinica,2019,48(7):889-897. DOI:10.11947/j.AGCS.2019.20180248.

Foundation support： The National Natural Science Foundation of Anhui Province of China(No. 1408085MF129)

基金项目：安徽省自然科学基金(1408085MF129)

利用精密单点定位(precise point positioning,PPP)进行时频传递精度高，传递精度可以达到亚纳

秒量级。与双向卫星时间频率传递方法(two way satellite time and frequency

transfer,TWSTFT)相比，PPP时频传递不受卫星转发器限制，操作简便灵活，国际计量局(bureau international des poids et mesures,BIPM)将PPP作为时频传递的重要手段，并与国际GNSS服务