| 不同系统间偏差模型对GPS/BDS/Galileo精密单点定位的影响 |
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| 引用本文： | 齐文龙,柴洪洲,尹 潇,杜祯强,石明琛.不同系统间偏差模型对GPS/BDS/Galileo精密单点定位的影响[J].大地测量与地球动力学,2020,40(10):1017-1021. |
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| 作者姓名： | 齐文龙 柴洪洲 尹 潇 杜祯强 石明琛 |
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| 摘 要： | 基于双频非组合PPP模型，采用常量模型、白噪声模型和随机游走模型对ISB参数进行处理，利用7个MGEX测站10 d的数据进行静态和仿动态实验，并分析3种模型的收敛时间和定位精度。结果表明，在收敛时间方面，随机游走模型和白噪声模型效果一致，总体优于常量模型，静态和仿动态下分别提升15.4%和29.4%；在定位精度方面，随机游走模型和白噪声模型效果相当，较常量模型在E、U方向上精度提升最为明显，静态下E和U方向的精度分别提升约77.7%和32.2%，在仿动态定位中E和U方向的精度分别提升约66%和43.5%。
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| 关 键 词： | 系统间偏差 非组合精密单点定位 白噪声 随机游走 静态 仿动态 |
The Influence of Different ISB Models on GPS/BDS/GalileoPrecise Point Positioning |
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| QI Wenlong,CHAI Hongzhou,YIN Xiao,DU Zhenqiang,SHI Mingchen.The Influence of Different ISB Models on GPS/BDS/GalileoPrecise Point Positioning[J].Journal of Geodesy and Geodynamics,2020,40(10):1017-1021. |
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| Authors: | QI Wenlong CHAI Hongzhou YIN Xiao DU Zhenqiang SHI Mingchen |
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| Abstract: | Based on the dual frequency uncombined PPP model, ISB parameters are processed by constant, white noise and random walk models respectively. Static and simulated dynamic experiments are carried out by using 10 days data of 7 MGEX stations to analyze convergence time and positioning accuracy of 3 models. The results show that in terms of convergence time, the effect of the random walk and white noise models are the same, both of which are superior to the constant model; static and simulated dynamic methods increase by 15.4% and 29.4% respectively. In terms of positioning accuracy, the effect of the random walk model and white noise method are equivalent. Compared with constant method, the accuracy of E and U direction improve most obviously, increasing by about 77.7% and 32.2% in static state, and by about 66% and 43.5% in simulated dynamic positioning. |
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| Keywords: | inter-system bias uncombined precise point positioning white noise random walk static simulated dynamic |
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