GPS Partial Ambiguity Resolution Method for Zero-difference Precise Point Positioning

doi:10.11947/j.AGCS.2015.20150056

Abstract

Abstract: With the development of ambiguity resolution for precise point positioning(PPP) in recent years, it can improve positioning accuracy of PPP with short time observations since ambiguities can be fixed to right integers. However, unacceptable errors would be introduced into coordinate parameters if ambiguities are fixed to wrong integers. It's necessary to investigate the reliability and success rate of ambiguity-fixed PPP. This paper investigates PPP ambiguity fixing method based on zero-differenced fractional-cycle biases(FCBs). A partial ambiguity resolution(PAR) strategy based on cascaded quality control is proposed. Data sets from Europe CORS are used to validate and demonstrate PAR strategy. Results have showed that PPP ambiguity fixing can improve positioning accuracy of hourly PPP solution. When the strategy of PAR is applied, the influence of un-convergence ambiguities can be controlled efficiently and the success rate of PPP ambiguity fixing is improved.

Key words: precise point positioning, ambiguity resolution, quality control, success rate

CLC Number:

P228

PAN Zongpeng, CHAI Hongzhou, LIU Jun, DONG Bingquan, LIU Ming, WANG Huarun. GPS Partial Ambiguity Resolution Method for Zero-difference Precise Point Positioning[J]. Acta Geodaetica et Cartographica Sinica, 2015, 44(11): 1210-1218.

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