北斗三号系统PPP-B2b信号定位服务模型及性能分析

Model and Performance Analysis for BDS-3 PPP-B2b Signal Positioning Service

给出了PPP-B2b信号定位的观测模型和随机模型,详细阐述了PPP-B2b增强改正模型和参数估计模型,并进行了静态和动态定位实验。结果表明:对于单系统,在30min的收敛时间内,北斗三号定位精度可以达到水平0.118m(静态)、0.176m(动态),高程0.208m(静态)、0.423m(动态)以内,GPS定位精度可以达到水平0.113m(静态)、0.163m(动态),高程0.206m(静态)、0.377m(动态)以内;对于北斗三号/GPS双系统,在20min的收敛时间内,定位精度可以达到水平0.092m(静态)、0.122m(动态),高程0.158m(静态)、0.312m(动态)以内。无论是收敛性还是定位精度,均能满足北斗三号精密单点定位服务指标的要求。

In this paper,the observation model and random model of PPP-B2b signal of positioning are given,the enhanced correction model and estimation model of PPP-B2b are described in detail,and the static and dynamic positioning experiments are carried out.The results show that for single system,within 30 minutes of convergence,BDS-3 positioning accuracy can reach 0.118m(static)and 0.176m(dynamic)in horizontal direction,and 0.208m(static)and 0.423m(dynamic)in vertical direction.GPS positioning accuracy can reach 0.113m(static)and 0.163m(dynamic)in horizontal direction,and 0.206m(static)and 0.377m(dynamic)in vertical direction.For BDS-3/GPS dual system,within 20 minutes of convergence,the positioning accuracy can reach 0.092m(static)and 0.122m(dynamic)in horizontal direction,and 0.158m(static)and 0.312m(dynamic)in vertical direction.Both convergence and positioning accuracy can meet the requirements of BDS-3 precise point positioning service index.