Cooperative time synchronization via laser/radio inter-satellite links in navigation constellations

Liu, SuYang; Yang, Ninghu; Guo, Xiaofeng; Chen, Gang; Yang, Jun; Sun, Liping

doi:10.1360/sspma-2020-0221

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…In view of the satellite time frequency system abnormality caused by power off and restart of the load time system, Chen et al [4] proposed a strategy for inter-satellite link error correction using ranging and data transmission functions of inter-satellite link. Liu et al [5] proposed a cooperative time synchronization method via laser/radio inter-satellite links. The simulation results showed that the stability in the short and medium terms of the time reference generated with the proposed method is significantly improved compared with that generated via radio inter-satellite links.…”

Section: Introductionmentioning

confidence: 99%

A Fast Detection Method of Pseudo-Range Jump

Yang¹,

Yang

Zhang³

et al. 2023

Frontiers in Artificial Intelligence and Applications

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In view of the large workload and low efficiency in precisely determining pseudo-range jump time in the two-way ranging time synchronization of the navigation system, a method for rapid determination of pseudo-range jump based on clock drift rate estimation and binary search was proposed. The method took advantage of the property that the drift rate of on-board atomic clock is relatively stable over a long period of time. Firstly, the correct clock drift rate was calculated from the uplink and downlink pseudo-ranges according to the pseudo-range observing equations. Afterwards, the potential time period during which jump occurred was divided equally, producing two sub time periods. Two clock drift rate values and two jump quantities were solved respectively from the pseudo-range data of the above two sub time periods, and the next potential time period was the one with the larger jump quantity. The above procedure was repeated until the final potential time period was short enough. Finally, the precise jump time was determined by difference with the data in the final potential time period. Experimental results illustrate the correctness and effectiveness of the proposed method.

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Section: Introductionmentioning

confidence: 99%