基于固定模糊度技术的精密单点定位性能分析

模糊度固定是影响精密单点定位精度和快速收敛的主要问题之一,而相位偏差的有效分离是模糊度固定的关键因素,采用包含相位偏差的钟差和与之耦合的轨道来完成模糊度的固定,基于全球分布的5个IGS连续跟踪站5 d的观测数据,采用采样间隔为30 s的高精度精密钟差产品,研究精密单点定位(PPP)的整周模糊度在固定解模式和浮点解模式下...

Analysis of Precise Point Positioning Performance Based on Ambiguity Fixing Mode

Ambiguity fixing is one important issue that impacts the accuracy and fast convergence of precise point positioning,and efficiently separating the phase deviation is very important.The clock product that includes phase deviation and the orbit product coupled with the clock product are utilized to fix ambiguity.Based on the original observation data of 5 days from five IGS tracking stations as well as the precise satellite clock with 30 s sampling interval,the positioning accuracy and convergence time under PPP ambiguity fixing mode and conventional float resolution mode are tested.The results show that under ambiguity fixing mode,the positioning accuracy increases by 59%and 38%in both the X and Y direction.The increase in the Z direction is smaller than that in the X and Y direction,which is 13%,and the fixing ratio of the ambiguity is above 95%.