北斗/GPS组合伪距单点定位性能测试和分析  

Test and Analysis of BeiDou/GPS Combined Pseudo-range Point Positioning Performance

作　　者：唐卫明[1] 徐坤[1] 金蕾[1] 文雪中 

机构地区：[1]武汉大学卫星导航定位技术研究中心,湖北武汉430079 [2]重庆市勘测院,重庆400020

出　　处：《武汉大学学报（信息科学版）》2015年第4期529-533,共5页Geomatics and Information Science of Wuhan University

基　　金：某部预研基金资助项目(9140A24020713JB11342);某部十二五预研资助项目(51324040103);国家863计划资助项目(2012AA12A202)~~

摘　　要：讨论了北斗/GPS伪距单点定位联合解算的数学模型,并根据北京、武汉两地的北斗/GPS双系统实测数据,在多种模拟遮挡环境下将北斗/GPS联合解算结果与北斗、GPS单系统在可见卫星数、PDOP值、定位精度、定位可用性等方面进行了对比分析。结果表明,相对于单系统伪距单点定位,北斗/GPS组合定位大大增加了可见卫星数,减小了PDOP值,并在观测条件较差的环境下有效地改善了定位精度,显著提高了系统定位可用性。This paper first discussed the mathematical model of BeiDou/GPS combined pseudo-range point positioning.And then observational data of Beijing and Wuhan stations was used to compare BeiDou/GPS combined solution results with BeiDou and GPS single system solution results on the aspects of satellite visibility,PDOP value,positioning accuracy and usability in multiple simulative masking environment.The numerical results showed that compared with the pseudo-range point positioning of a single system,BeiDou/GPS combined positioning greatly increases the number of visible satellites and reduces the PDOP value.In addition,the combined system can effectively improve the positioning accuracy and the usability under poor observation conditions.

关 键 词：北斗卫星导航系统 GPS 伪距单点定位 联合解算 可用性 

分 类 号：P228.1[天文地球—大地测量学与测量工程]