Abstract
The satellite clock products are essential for precise point positioning (PPP). They can be obtained from International GNSS Service (IGS) analysis centers for most users. However, the final clock products provided by IGS analysis centers have day-boundary jumps between two adjacent days. The traditional compensation method based on single-epoch may introduce satellite clock errors, and then leads to a poor accuracy of PPP at the day-boundary. In this paper, a compensation method based on epoch-differenced is proposed. The method makes full use of all the satellite clock data before and after the day-boundary. After averaging clock data based on epoch-differenced, the day-boundary compensation items are estimated accurately. The final satellite clock products provided by Center of Orbit Determination in Europe are used to verify the compensation effect of the method proposed in this paper. The results show that, compared with the traditional compensation method based on single-epoch, the RMS and STD of clock model fitting residuals are improved by 1.80% and 9.83%, respectively. In addition, the RMS and STD accuracy of PPP are improved by 47.73% and 55.64% within two hours after the day-boundary, respectively.
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Acknowledgements
This research was jointly funded by the National Natural Science Foundation of China (No. 61773132, 61633008, and 61803115), the China Postdoctoral Science Foundation (No. 2020M681078), the Postdoctoral Innovation Project in Shandong Province (No. 202003050), the Postdoctoral Applied Research Project in Qingdao (No. QDBSHYYYJXM20200101), and the Outstanding Youth Research Science Foundation in Heilongjiang Province (No. JC2018019).
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Huang, W., Li, M., Li, H., Wang, R., Li, N., Li, L. (2021). A Compensation Method of Satellite Clock Day-Boundary Jumps Based on Epoch-Differenced. In: Yang, C., Xie, J. (eds) China Satellite Navigation Conference (CSNC 2021) Proceedings. Lecture Notes in Electrical Engineering, vol 774. Springer, Singapore. https://doi.org/10.1007/978-981-16-3146-7_3
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