BDS不同双频组合的GAMIT长基线解算精度分析  

Analysis of GAMIT long baseline solution accuracy for different dual frequency combinations of BDS

作　　者：刘甄文 陈裕汉 李国柱[1,3] 张豫宁 LIU Zhenwen;CHEN Yuhan;LI Guozhu;ZHANG Yuning(Faculty of Land and Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;College of Continuing Education,West Yunnan University of Applied Technology,Dali 671009,China;Yunnan Haiju Geographic Information Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093 [2]滇西应用技术大学继续教育学院,云南大理671009 [3]云南海钜地理信息技术有限公司,云南昆明650093

出　　处：《无线电工程》2024年第12期2950-2958,共9页Radio Engineering

基　　金：滇西应用技术大学人才引进科研启动项目(4301502030142)。

摘　　要：针对北斗卫星导航系统(BeiDou Navigation Satellite System, BDS)多频点信号搭配和多星座组合的特点,为研究北斗系统支持下不同双频组合长基线精密相对定位的精度,使用加米特(GAMIT)对连续27 d多星座实验(Multi-GNSS Experiment, MGEX)跟踪站组成的长基线进行不同双频组合解算,对比北斗二号(BDS-2)B1I-B2I、B1I-B3I和北斗三号(BDS-3)B1I-B3I、B1I-B2a、B1C-B2a及北斗系统的B1I-B3I与全球定位系统(Global Positioning System, GPS)LI-L2的解算结果,从标准化均方根误差(Normalized Root Mean Square Value, NRMS)、基线长中误差、基线重复率和坐标差值4个方面评定北斗系统的定位精度。结果表明,BDS-2 B1I-B3I定位精度优于B1I-B2I,BDS-3所采用的B1C-B2a定位精度优于B1I-B2a和B1I-B3I,北斗系统B1I-B3I解算精度与GPS L1-L2相当。BDS-2和BDS-3分别使用B1I-B3I和B1C-B2a双频组合进行解算精度可观,为其他卫星系统选择不同双频组合解算提升相对定位精度提供了一种思路。According to the characteristics of multi-frequency point signal combination and multi-constellation combination of the Beidou satellite navigation Satellite system,In order to study the precision of different dual-frequency combinations supported by Beidou DS,Using Garit(GAMIT)for continuous 27d multiconstellation experimental tracking stations(the Multi-GNSS Experiment,MGEX)composed of a long baseline for different double-frequency combination solution,B1I-B2I,B 2 I,B1I-B3I and Beidou 3-3 B1I-B3I,B1I-B2a and B1C-B2a and the B1I-B3I with the global positioning system(Global Positioning System,GPS)results for LI-L2,The positioning accuracy of BDS was evaluated from four aspects:standardized root mean square error value,error in baseline length,baseline repetition rate and coordinate difference.The results show that the positioning accuracy of Beidou 2 B1I-B3I is better than that of B1I-B2I,the positioning accuracy of B1C-B2a adopted by Beidou 3 is better than that of B1I-B2a and B1I-B3I,and the solution accuracy of B1I-B3I of Beidou system is comparable to that of GPS L1-L2.Beidou-2 and Beidou-3 use B1I-B3I and B1C-B2a dual-frequency combination for considerable solution accuracy,and provide an idea for other satellite systems to choose different dual-frequency combination to improve the relative positioning accuracy.

关 键 词：北斗系统 双频组合 精密相对定位 精度评定 

分 类 号：TP18[自动化与计算机技术—控制理论与控制工程]