BDS-3+GPS精密单点定位模型及性能分析  

BDS-3+GPS precise point positioning modeling and performance analysis

作　　者：陈一彪 秘金钟[2] 谷守周[2] 杨李俊 王洪斌 楚彬 CHEN Yibiao;BEI Jinzhong;GU Shouzhou;YANG Lijun;WANG Hongbin;CHU Bin(Liaoning Technical University,Fuxin 123000,China;Chinese Academy of Surveying and Mapping,Beijing 100036,China;Shandong University of Science and Technology,Qingdao 266590,China;The Second Geodetic Surveying Brigade of Ministry of Natural Resources,Harbin 150025,China;Hunan Institute of Surveying and Mapping Technology,Changsha 410007,China;China Academy of Surveying and Mapping in Hunan Branch,Changsha 410007,China)

机构地区：[1]辽宁工程技术大学,辽宁阜新123000 [2]中国测绘科学研究院,北京100036 [3]山东科技大学,山东青岛266590 [4]自然资源部第二大地测量队,黑龙江哈尔滨150025 [5]湖南省测绘科技研究所,湖南长沙410007 [6]中国测绘科学研究院湖南分院,湖南长沙410007

出　　处：《测绘通报》2022年第6期12-17,39,共7页Bulletin of Surveying and Mapping

基　　金：国家重点研发计划(2021YFC3000504);国家自然基金重点基金(41930535);全球连续监测评估系统项目(CFZX0301040308-06);自然资源部国土卫星遥感应用重点实验室基金(KLSMNR-202109);湖南省大数据与测绘地理信息服务专项(HNGTCH-2021-08)。

摘　　要：北斗导航卫星系统于2020年7月正式建成并开通,BDS-3卫星在B1I和B3I基础上,增加B1C、B2a民用频率,为验证BDS-3不同频率与GPS组合定位性能,分别对BDS-3(B1C+B2a)+GPS与BDS-3(B1I+B3I)+GPS组合PPP定位性能进行分析,并与BDS-3单系统进行对比。结果表明,在静态定位中,BDS-3(B1C+B2a)+GPS组合在高程方向精度优于2 cm,低于BDS-3(B1I+B3I)+GPS组合;在水平方向精度相当,优于1 cm,收敛时间减少9%;与BDS-3相比,定位精度提高10%~25%,收敛时间减少17%~24%。在动态定位中,BDS-3(B1C+B2a)+GPS与BDS-3(B1I+B3I)+GPS定位精度相当,收敛时间减少14%;与BDS-3相比,BDS-3(B1C+B2a)+GPS动态PPP在高程方向精度优于4 cm,水平方向精度优于3 cm,定位精度提高31%~38%,收敛时间减少52%~58%。The BeiDou navigation satellite system is officially completed and put into operation in July 2020.Based on B1 I and B3 I,the BDS-3 satellite adds B1 C and B2 a civil frequencies.In order to verify the positioning performance of BDS-3 with different frequencies combined with GPS,the PPP positioning performance of BDS-3(B1 I+B3 I)+GPS and BDS-3(B1 C+B2 a)+GPS is analyzed,and compared with that of BDS-3.The results show that in static positioning,the elevation direction accuracy of BDS-3(B1 C+B2 a)+GPS is lower than that of BDS-3(B1 I+B3 I)+GPS,the horizontal accuracy is similar,and the convergence time is reduced by 9%;The horizontal accuracy of BDS-3(B1 C+B2 a)+GPS is better than 1 cm,and the elevation accuracy is better than 2 cm.Compared with BDS-3,the positioning accuracy is improved by about 10%~25%,and the convergence time is reduced by 17%~24%.In kinematic positioning,the positioning accuracy of BDS-3(B1 C+B2 a)+GPS is equivalent to that of BDS-3(B1 I+B3 I)+GPS,and the convergence time is reduced by 14%;The horizontal accuracy of BDS-3(B1 C+B2 a)+GPS is better than 3 cm,and the elevation accuracy is better than 4 cm.Compared with BDS-3,the positioning accuracy is improved by about 31%~38%,and the convergence time is reduced by about 52%~58%.

关 键 词：精密单点定位 BDS-3 BDS-3+GPS 定位精度 收敛时间 

分 类 号：P228.4[天文地球—大地测量学与测量工程]