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 singledifference 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.
CITATION STYLE
Chen, L., Geng, C., Zhou, Q., & Jiao, W. (2015). Estimation strategy and accuracy analysis of GNSS real-time precise satellite clock error. In Lecture Notes in Electrical Engineering (Vol. 342, pp. 57–66). Springer Verlag. https://doi.org/10.1007/978-3-662-46632-2_5
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