Abstract
The rapid development of the Beidou navigation satellite system (BDS) accelerates the user demands for high-precision position and navigation. International GNSS Monitoring and Assessment System (iGMAS) built by China independently provides a good platform for GNSS high-precise real-time products. In this paper, the precise satellite clock error resolving model and strategy are studied, the feasibility of real-time precise clock error estimation on the premise of guarantee accuracy is researched, and the precision of real-time precise clock error using iGMAS site resources (built and planning) is verified. The results show: There is convergence process in the Un-difference mode to realize real-time clock estimation and the convergence RMS accuracy comparing to IGS is about 0.2 ns; Epoch single-difference model eliminates the continuous ambiguity, so there is no convergence process, the precision is better than 0.2 ns; On the whole, the precision of Un-difference mode and epoch single-difference model is quite; From the calculation efficiency and high-precision clock error application, the epoch single-difference model is adapt to GNSS real-time precise clock estimation because of less resolved parameters; Using iGMAS site resources (built and planning) recently, the precision of clock estimated by epoch single-difference model is about 0.2 ns.
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References
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Ackowledgments
Thanks to GNSS data and high-precision products provided by international GNSS Monitoring and Assessment System (iGMAS), and the support from China Satellite Navigation Conference 2012 youth outstanding papers found project (CSNC2012-QY-4).
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Chen, L., Geng, C., Zhou, Q., Jiao, W. (2015). Estimation Strategy and Accuracy Analysis of GNSS Real-Time Precise Satellite Clock Error. In: Sun, J., Liu, J., Fan, S., Lu, X. (eds) China Satellite Navigation Conference (CSNC) 2015 Proceedings: Volume III. Lecture Notes in Electrical Engineering, vol 342. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-46632-2_5
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DOI: https://doi.org/10.1007/978-3-662-46632-2_5
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