Abstract In order to explore the operating status and performance of the BDS-2 satellite clock at this stage, based on the 365 days of precision clock offset data from the international GNSS monitoring and assessment system(iGMAS) in 2018, this paper introduces the Score test into the clock offset detection and combines the median method to control the data quality, making up for the gross error defect of the median method. Then, from the six aspects of frequency accuracy, frequency drift rate, frequency stability, model fitting residual, period characteristics and noise type, we comprehensively evaluate the relevant performance of BDS-2 satellite clock. The results show that: at this stage, the BDS-2 on-orbit satellite clock is in good operating condition, all performance indicators are normal, and the corresponding system services can continue to be provided. Among them, the frequency accuracy of the BDS-2 satellite clock is 3.15×10-11; the daily drift rate is 1.59×10-13; the frequency tens of seconds stability is 5.72×10-14; the average accuracy of the model fitting residual is 0.593 ns; the GEO, IGSO, and MEO three types of satellite clock data have significant periodic characteristics, and the first and second main periods are related to their respective satellite orbit periods, which are about 0.5 times or 1 times their orbital periods respectively; the BDS satellite clock noise types are basically the same under different smoothing times, and are affected by WFM, FFM and RWFM.
PAN Xiong,YANG Yufeng,OU Jikun et al. Performance Evaluation and Analysis of the Final Stage of BDS-2 Satellite Clock Design Period[J]. jgg, 2020, 40(10): 991-999.
PAN Xiong,YANG Yufeng,OU Jikun et al. Performance Evaluation and Analysis of the Final Stage of BDS-2 Satellite Clock Design Period[J]. jgg, 2020, 40(10): 991-999.
