Ionospheric time-delay correction for C-band TWSTFT based on COMPASS observations

KONG Yao^1,2,3, YANG Xu-hai^1,2, SUN Bao-qi^1,2, LI Zhi-gang¹, CHEN Liang¹

(1. National Time Service Centre, Chinese Academy of Sciences, Xi′an 710600, China;

2. Key Laboratory of Precision Navigation and Timing Technology, National Time Service Center,

Chinese Academy of Sciences, Xi′an 710600, China;

3. Graduate University of Chinese Academy of Sciences, Beijing 100039, China)

Abstract: For improving the precision of C-band TWSTFT(two way satellite time and frequency transfer), the ionospheric time-delay effect on C-band TWSTFT is calculated with the method of using the carrier phase data to smooth the pseudo-range. The COMPASS G3 satellite was observed at Lintong station and Kashi station, and the TWSTFT between these two stations was conducted. The results show that the maximal ionospheric time-delay effect on C-band TWSTFT was 0.47 ns during the experiments.

         Key words: COMPASS; TWSTFT(two way satellite time and frequency transfer); ionospheric time delay