北斗PPP-B2b与CNES实时产品性能的比较与评估
2024,46(6):113-122
姬生月
中国石油大学华东 海洋与空间信息学院, 山东 青岛 266580
郑千里
中国石油大学华东 海洋与空间信息学院, 山东 青岛 266580
王振杰
中国石油大学华东 海洋与空间信息学院, 山东 青岛 266580
贺凯飞
中国石油大学华东 海洋与空间信息学院, 山东 青岛 266580
中国石油大学华东 海洋与空间信息学院, 山东 青岛 266580
郑千里
中国石油大学华东 海洋与空间信息学院, 山东 青岛 266580
王振杰
中国石油大学华东 海洋与空间信息学院, 山东 青岛 266580
贺凯飞
中国石油大学华东 海洋与空间信息学院, 山东 青岛 266580
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 phase Ⅲ, 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。
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 phase Ⅲ, 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。
基金项目：
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)
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)
Comparison and evaluation of BeiDou PPP-B2b and CNES real-time products′ performance
JI Shengyue
College of Oceanography and Space Informatics, China University of Petroleum, Qingdao 266580, China
ZHENG Qianli
College of Oceanography and Space Informatics, China University of Petroleum, Qingdao 266580, China
WANG Zhenjie
College of Oceanography and Space Informatics, China University of Petroleum, Qingdao 266580, China
HE Kaifei
College of Oceanography and Space Informatics, China University of Petroleum, Qingdao 266580, China
College of Oceanography and Space Informatics, China University of Petroleum, Qingdao 266580, China
ZHENG Qianli
College of Oceanography and Space Informatics, China University of Petroleum, Qingdao 266580, China
WANG Zhenjie
College of Oceanography and Space Informatics, China University of Petroleum, Qingdao 266580, China
HE Kaifei
College of Oceanography and Space Informatics, China University of Petroleum, Qingdao 266580, China
Abstract：
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 phase Ⅲ) 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.
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 phase Ⅲ) 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.
收稿日期：
2022-07-14
2022-07-14
