Feasibility of Precise Timing with Uncombined PPP
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Abstract
The theory and mathematical model of uncombined precise point positioning were proposed.And several effective data processing strategies were proposed to improve PPP receiver clock solution by avoid absorbing some un-modeled system errors.Full-featured PPP software was developed base on the GPSTk core library.Experiments with data from IGS stations distributed all over the world were carried out to evaluate the performance of GPS timing with uncombined PPP algorithm.The results support that PPP algorithm can achieve sub-nanosecond(0.3 ns) level receiver clock solution,and the uncombined PPP algorithm has better accuracy than the classic PPP algorithm with all things being equal.
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