Performance Analysis of PPP in Mode of PPP_AR
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摘要: 利用6个IGS跟踪站一周的静态数据,采用采样间隔为30 s的卫星钟差产品,对精密单点定位(PPP)整周模糊度的固定模式——PPP_AR模式和常规的浮点解模式下的定位精度和收敛时间进行了比较试验。结果表明,PPP_AR模糊度固定模式下,数据之间具有自洽性,定位精度在E-W和N-S两个方向的RMS都优于1 cm,在U-D方向优于3.5 cm,明显高于浮点解模式下的定位精度。且PPP_AR模式下整周模糊度的固定率都在93%以上。PPP_AR模式下的收敛时间集中在20~25 min,浮点解模式25~35 min。Abstract: In this paper, we use one a week data(the sampling interval of satellite clock is 30 s) of six IGS tracking stations to test the positioning accuracy and convergence time under PPP fixed ambiguity pattern-PPP_AR mode and conventional float solution mode. The results show that under PPP_AR solving mode, and for selfconsistency between the data, positioning accuracy of RMS can be smaller than 1 cm in both E-W and N-S directions, and in the U-D direction smaller than 3.5 cm, The results are obviously better than that of the conventional floatingpoint solution mode. The ambiguity fixed rate under PPP_AR mode is larger than 93%, the convergence time of PPP_AR mode focused on 20~25 min, while of the float solution mode on 25~35 min.
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Key words:
- PPP_AR /
- PPP /
- self-consistency /
- positioning accuracy /
- convergence time
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