The global navigation satellite system(GNSS)is an important application method for high-precision time and long-distance transfer technology.This paper proposes a triple-frequency carrier phase high-precision time long-distance transfer method based on the Beidou navigation satellite system(BDS),which is limited by the combination of the global positioning system(GPS)carrier signals for high-precision time long-distance transfer.Pairwise combinations of BDS carrier signals B1,B2 and B3 are performed,and secondary stacking without ionosphere is performed to weaken the impact of various full-link errors.It is verified that the B12 and B13 combination has the lowest time transfer accuracy,while the B13 and B23 combination has the highest time transfer accuracy.The difference in the root mean square(RMS)error of the time transfer error among the three combinations does not exceed 0.03 ns.Compared with the international precision clock deviation method,the experimental results show that on a time chain of 2 600 km,the root mean square error of time transfer based on BDS triple-frequency carrier phase is less than 0.244 ns,indicating that long-distance time transfer based on BDS triple-frequency carrier phase can achieve sub-nanosecond level,providing technical support for global navigation satellite system applications.
维普
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