随机模型对BDS/GPS伪距单点定位精度影响分析

Analysis of the Influence of Random Model on BDS/GPS Pseudo-range Single Point Positioning Accuracy

针对BDS/GPS伪距单点定位中随机模型选择问题,本文对比分析高度角随机模型、信噪比随机模型、等权随机模型在BDS/GPS伪距单点定位中的适用性。经实验研究发现,GPS/BDS3/BDS-2卫星可见数、PDOP值、伪距单点定位精度最优,相比GPS和BDS-3单独定位都有非常明显的提升,除GPS个别情况外,采用高度角随机模型伪距单点定位精度最优,信噪比次之,等权模型最低。本文的实验结论,可为今后伪距单点定位随机模型的选择提供一定的参考。

Aiming at the problem of random model selection in BDS/GPS pseudo-range single-point positioning,this paper compares and analyzes the applicability of height angle random model,signal-to-noise ratio random model,and equal-weight random model in BDS/GPS pseudo-range single-point positioning.Experimental studies have found that GPS/BDS3/BDS-2 satellites have the best visibility,PDOP value,and pseudo-range single-point positioning accuracy.Compared with GPS and BDS-3 separate positioning,they have a very significant improvement.Except for individual cases of GPS,The pseudo-range single-point positioning accuracy u-sing the height angle random model is the best,followed by the signal-to-noise ratio,and the equal-weight model is the lowest.Through the experimental conclusions of this article,it can provide a certain reference for the selection of pseudo-range single-point positioning random models in the future.