GNSS兼容频点动态PPP性能分析  

Performance Analysis of GNSS Compatible Frequency Dynamic PPP

作　　者：陈秀德 刘惠[3] 惠沈盈 应俊俊[1,2] 张京奎 CHEN Xiude;LIU Hui;HUI Shenying;YING Junjun;ZAHNG Jingkui(The 54th Research Institute of CETC,Shijiazhuang 050081,China;State Key Laboratory of Satellite Navigation System and Equipment Technology,Shijiazhuang 050081,China;School of Computer Science and Technology,Xidian University,Xi'an 710075,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]卫星导航系统与装备技术国家重点实验室,河北石家庄050081 [3]西安电子科技大学计算机科学与技术学院,陕西西安710075

出　　处：《无线电工程》2023年第5期1078-1085,共8页Radio Engineering

基　　金：国家重点研发计划(2019YFC1511504);中国电子科技集团公司信息科学研究院发展基金项目(BAX20684X010);卫星导航与装备技术国家重点实验室开放基金项目(CEPNT-2018KF-13)。

摘　　要：为验证GNSS兼容频点定位性能,给出了顾及系统间偏差的PPP模型,推导了各GNSS兼容频点卫星UCD改正模型。基于全球范围内的MGEX测站,从5个方面开展了7种定位模式下,动态PPP性能分析。结果表明:(1) BDS-3兼容频点在3个单系统测试中最优,定位率、PDOP及可用卫星数分别为97.61%、1.94和9,Galileo次之,GPS最差;(2) BDS-3与其他系统的联合模式要优于其它系统间的联合,并且在GNSS联合定位中,BDS-3贡献最大;(3) BDS-3/Galileo联合模式收敛时间最快和收敛精度最高,E、N、U各方向收敛时间分别为22.70、7.99、11.17 min,收敛精度分别为1.6、1.2、4.9 cm;(4) BDS-3与其他系统联合均可显著加快收敛时间和提高收敛精度。可明显看出,BDS-3在GNSS兼容互操作发展方向扮演着重要的角色。In order to verify the positioning performance of GNSS compatible frequency,a PPP model considering the inter system bias was proposed,and a UCD correction model was derived for each GNSS compatible frequency of all satellites.Based on MGEX stations worldwide,the dynamic PPP performance under seven positioning modes is compared and analyzed from five aspects.The results show that,①BDS-3 is the best compatible frequency among the three single systems,and the positioning rate,PDOP and number of available satellites are 97.61%,1.94 and 9,respectively,followed by Galileo and GPS;②The combined mode of BDS-3 and other systems is better than other combined systems,and in GNSS joint positioning,BDS-3 contributes the most;③The convergence time of BDS-3/Galileo combined mode is the fastest and the convergence accuracy is the highest.The convergence time of E,N and U directions is 22.70,7.99 and 11.17 min,and the convergence accuracy is 1.6,1.2 and 4.9 cm,respectively.④The combination of BDS-3 and other systems can significantly accelerate the convergence time and improve the convergence accuracy.Therefore,it is clear that BDS-3 plays an important role in the development of GNSS compatibility and interoperability.

关 键 词：全球导航卫星系统 精密单点定位 兼容频点 北斗三号 收敛时间 收敛精度 

分 类 号：TN967.1[电子电信—信号与信息处理] P228.4[电子电信—信息与通信工程]