摘要
为了综合评估北斗导航卫星系统(BeiDou Navigation Satellite System,BDS)北斗二号(BDS-2)与北斗三号(BDS-3)的数据质量以及BDS-2/BDS-3联合(BDS-2/3)定位性能,文章根据多卫星系统试验网(Multi-GNSS Experiment,MGEX)跟踪站的观测数据,从信噪比(signal-to-noise ratio,SNR)、多路径(multi-path,MP)效应、卫星可见性和位置精度因子(position dilution of precision,PDOP)方面,对BDS-2和BDS-3卫星数据质量进行分析,并将BDS-3与美国的全球定位系统(Global Positioning System,GPS)在兼容互操作频点上进行对比,进一步分析比较BDS-2和BDS-2/3的静态精密单点定位(precise point positioning,PPP)精度和收敛速度。结果表明:在SNR、MP效应方面,BDS-3的观测数据质量表现较好,在兼容互操作频点上BDS-3的SNR和MP效应表现也较优于GPS,BDS-3的卫星可见性和PDOP值表现较BDS-2差;静态PPP精度方面,BDS-2在E、N、U方向定位误差平均均方根(root mean square,RMS)值分别为3.9、3.6、7.0 cm,其平均收敛时间在E、N、U方向分别为73.1、69.0、73.3 min,BDS-2/3在E、N、U方向定位误差平均RMS值分别为2.3、1.3、4.8 cm,其平均收敛时间在E、N、U方向分别为28.2、25.5、38.0 min;相比于BDS-2,BDS-2/3在收敛速度与定位精度上都有明显改善。
In order to comprehensively evaluate the data quality of the BDS-2 and BDS-3 and the performance of the combined BDS-2/BDS-3(BDS-2/3)positioning,this paper analyzes the data quality of BDS-2 and BDS-3 satellites based on the observation data of the Multi-GNSS Experiment(MGEX)tracking station,considering the evaluation indicators such as the signal-to-noise ratio(SNR),multi-path(MP)effect,satellite visibility and position dilution of precision(PDOP)value,and compares BDS-3 and Global Positioning System(GPS)in terms of compatible and interoperable frequency points.The paper further analyzes and compares the accuracy and convergence speed of the static precise point positioning(PPP)of BDS-2 and BDS-2/3.The results show that the quality of BDS-3 observation data is better in terms of SNR and MP effect.BDS-3 also outperforms GPS at compatible and interoperable frequencies.The satellite visibility and PDOP value of BDS-3 are poorer than those of BDS-2.As for static PPP accuracy,the average root mean square(RMS)values of BDS-2 in the E,N and U directions is 3.9 cm,3.6 cm and 7.0 cm,and the average convergence time in the E,N and U directions is 73.1 min,69.0 min and 73.3 min,and the average RMS values of BDS-2/3 in the E,N and U directions is 2.3 cm,1.3 cm and 4.8 cm,and the average convergence time in the E,N and U directions is 28.2 min,25.5 min and 38.0 min.It can be seen that compared with BDS-2,the BDS-2/3 has obvious improvement in convergence speed and positioning accuracy.
作者
崔健
米宏志
朱明水
马东岭
柴大帅
CUI Jian;MI Hongzhi;ZHU Mingshui;MA Dongling;CHAI Dashuai(School of Surveying and Geo-Informatics,Shandong Jianzhu University,Jinan 250101,China)
出处
《合肥工业大学学报（自然科学版）》
CAS
北大核心
2022年第4期526-532,共7页
Journal of Hefei University of Technology：Natural Science
基金
国家自然科学基金资助项目(41601489)
山东省自然科学基金资助项目(ZR2020MD025)
山东省高等学校科技计划资助项目(J16LH05)
