几种随机模型对北斗定位精度影响研究

Study on the influence of several stochastic models on Beidou positioning accuracy

在北斗高精度定位中,随机模型的选择对定位精度影响很大。基于北斗三号卫星组网趋于完善,文中系统地深入研究北斗卫星定位中不同随机模型的理论与方法,详细阐述了常见的四种随机模型对北斗载波相位定位的重要性。最后利用这四种随机模型,以北斗卫星数据为例,通过两组实验解算精度统计、分析与比较,得出以下结论:一般情况下载噪比模型、信号强度模型定位精度较高,高差较大时可采用高度角模型。

In the high-precision positioning of Beidou,the selection of the stochastic model had the great influence on the positioning accuracy.Based on the improvement of beidou-3 satellite network,in this paper,the theory and method of the different stochastic models were studied systematically in Beidou satellite positioning,and the importance of four common stochastic models for Beidou carrier phase positioning were expounded in detail.Finally,using four common stochastic models and taking Beidou satellite data as an example,through the statistics,analysis and comparison of two groups of experimental solution accuracy,it was concluded that the positioning accuracy of the download noise ratio model and the signal strength model was higher generally,and the height angle model could be used when the height difference was large.