Performance Analysis of Multi -GNSS Dynamic Precision Point Positioning
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Graphical Abstract
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Abstract
Based on the theory and method of GPS precise point positioning, this paper introduced a PPP observation model with multiple system combinations. This paper used observations from GPS, GLONASS, Galileo and BDS to study and analyze the positioning performance of 4-system combined PPP. The result showed that the accuracy of multi-GNSS PPP is much higher than single system PPP, GPS+GLONASS+GALILEO+BDS combination dynamic PPP in the three directions of the average deviation is about 0.7cm, 0.6cm and 1.7cm, the convergence time is about 15 ~ 20min. When the cutoff elevation angle increased, there was still a sufficient number of satellites. When the cutoff angle reached 30 degrees, still can reach cm-level positioning accuracy. The result of PPP solution on the airborne dynamic data showed that the result of the foursystem combination solves best with the result of GrafMov, and outperforms of two-system and single-system PPP.
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