北斗PPP-B2b与CNES实时产品性能的比较与评估  

Comparison and evaluation of BeiDou PPP-B2b and CNES real-time products′performance

作　　者：姬生月[1] 郑千里 王振杰[1] 贺凯飞[1] JI Shengyue;ZHENG Qianli;WANG Zhenjie;HE Kaifei(College of Oceanography and Space Informatics,China University of Petroleum,Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)海洋与空间信息学院,山东青岛266580

出　　处：《国防科技大学学报》2024年第6期113-122,共10页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(42074028);山东省自然科学基金资助项目(ZR2020MD042);中央高校基本科研业务费专项资金资助项目(18CX02064A)。

摘　　要：为分析PPP-B2b的实际服务性能,采用为期30 d的PPP-B2b数据与国际全球导航卫星系统(global navigation satellite system,GNSS)服务组织测站数据以及2021年12月16日的海上船载动态数据,进行了轨道与钟差的精度评估、实时精密单点定位(precise point positioning,PPP)的定位性能测试,并与采用法国国家太空中心(centre national d′etudes spatiales,CNES)存档产品CNT的相应结果进行比较。结果表明:PPP-B2b服务的北斗三号系统(BeiDou navigation satellite system phaseⅢ,BDS-3)与全球定位系统(global positioning system,GPS)轨道的径向精度分别为0.07 m、0.089 m,低于CNT 0.041 m和0.025 m。而BDS-3的钟差精度为0.029 m,与GPS钟差精度接近,优于CNES BDS-3的钟差精度0.057 m。基于PPP-B2b服务的静态定位测试中,BDS-3和BDS-3+GPS平均收敛时间小于20 min,优于单GPS系统,且收敛后精度更高。而在动态测试中,BDS-3和BDS-3+GPS组合东北天(north,east and up,NEU)方向均方根(root mean square,RMS)均优于11 cm,单GPS优于26 cm。在海上实际测试中,PPP-B2b的BDS-3+GPS组合NEU方向RMS分别为0.028 m、0.074 m、0.081 m,收敛时间为12.4 min。For analyzing PPP-B2b actual service performance,PPP-B2b data and International GNSS(global navigation satellite system)service data for a period of 30 days as well as offshore shipborne dynamic data on 16 December 2021 were used for evaluating orbit and clock offset accuracy and testing real-time PPP(precise point positioning)positioning performance.And compared with the corresponding results of CNT—archived products of CNES(centre national d′etudes spatiales,CNES).Results show that the radial accuracy of BDS-3(BeiDou navigation satellite system phaseⅢ)and GPS(global positioning system)track of PPP-B2b service are 0.07 m and 0.089 m respectively,which are below CNT 0.041 m and 0.025 m.The clock offset accuracy of BDS-3 is 0.029 m,close to GPS clock offset,better than 0.057m of CNES product accuracy.In the static positioning test based on PPP-B2b,BDS and BDS-3+GPS average convergence time is less than 20 minutes,better than that of GPS,and the convergence accuracy is higher than GPS.In the dynamic test,the RMS value of BDS-3 and BDS-3+GPS in the NEU(north,east and up)directions are better than 11 cm,GPS is better than 26 cm.In offshore positioning testing,the RMS value of BDS-3+GPS of PPP-B2b in the NEU directions are 0.028 m,0.074 m,0.081 m,and the convergence time is 12.4 min.

关 键 词：PPP-B2b服务 法国国家太空中心实时产品 实时精密单点定位 北斗三号系统 

分 类 号：P228[天文地球—大地测量学与测量工程]