Research on Method for Improving Timing and Positioning Service Based on Satellite Timing Monitoring Data
By utilizing satellite time-monitoring data to mitigate the impact of satellite-side and trans-mission path errors in standard single-point positioning,the timing stability and positioning accuracy at the user end are improved.At the same time,the timing deviation of the user relative to the satel-lite navigation system is corrected to be relative to the national standard time.Taking GPS as an ex-ample for a short baseline experiment,the results show that in terms of timing,the mean timing devi-ation of the L1 frequency band was improved from-42.8 ns to 5.4 ns,and from-53.6 ns to 2.8 ns for the L2 frequency band;in terms of positioning,the mean positioning errors in the X,Y,and Z di-rections for the L1 frequency band were improved by more than 55％,and by more than 77％for the L2 frequency band.This proves that by using satellite time-monitoring data,users of the satellite navigation sys-tem can not only enhance the pseudo-code positioning accuracy to the sub-meter level but also obtain the devi-ation relative to the national standard time,achieving ns-level timekeeping of the national standard time.
万方数据
维普
