北斗卫星导航系统动态定位精度测试与分析

Dynamic Positioning Accuracy Test and Analysis of BeiDou Satellite Navigation System

随着北斗卫星导航系统的建设与发展,致力于为全球用户提供稳定、可靠、优质的卫星导航服务,推动全球卫星导航事业在民航的发展。介绍了卫星导航系统的定位误差,以及影响定位精度的主要因素,通过与作为真值数据的GPS/INS组合导航定位数据进行比较,对不同海拔地区动态测试点定位精度进行分析。对高海拔山脉地区和低海拔平原地区,仿真分析了实测数据下精度因子与可见星数目的占比分布,并统计分析了两种海拔地区的动态定位测试精度。分析结果表明:北斗卫星导航系统在低海拔平原地区和高海拔山脉地区均可以提供实时导航定位服务,并可解算出卫星系统的动态定位精度,且定位结果均符合《北斗卫星导航系统公开服务性能规范》标准,满足用户的定位要求。

With the construction and development of BeiDou satellite navigation system,we are committed to providing stable,reliable and high quality satellite navigation services to global users and promoting the development of global satellite navigation in civil aviation.This paper introduces the positioning error of the satellite navigation system and the main factors that affect the positioning accuracy.By comparing with the GPS/INS navigation data as the true value data,the positioning accuracy of the dynamic test points in different altitude regions is analyzed.Firstly,the distribution of DOP and the number of visible stars in the measured data is simulated and analyzed for the high altitude mountain range and the low altitude plain area,and the dynamic positioning accuracy of the two kinds of altitude is statistically analyzed.The results of the measured data show that the Beidou satellite navigation system can provide real-time navigation and positioning services both in the low altitude plain and in the high altitude mountain range,and can calculate the dynamic positioning accuracy of the satellite system,and the positioning results are in compliance with the standards of"Beidou satellite navigation system performance standards for public service",to meet the user's positioning requirements.