GPS/BDS/GALILEO多系统融合伪距单点定位性能分析  

Performance Analysis of GPS/BDS/GALILEO Multi-system Combination Pseudo-range Point Positioning

作　　者：贾雪 徐炜 

机构地区：[1]安徽理工大学测绘学院,安徽淮南232001

出　　处：《全球定位系统》2017年第6期16-23,共8页Gnss World of China

基　　金：国家自然科学基金(批准号:41474026;41404004);安徽省自然科学基金资助项目(批准号:1408085QD72);安徽理工大学科研启动基金资助项目(编号:11152)

摘　　要：针对在不同截止卫星高度角的情况下,GPS、BDS、GPS/BDS、GPS/GALILEO、BDS/GALILEO、GPS/BDS/GALILEO间伪距单点定位精度的差异,本文对多系统融合伪距单点定位的数学模型和误差项处理方法进行了研究,以香港CORS站HKMW站点全天的数据为实验数据,在截止卫星高度角10°、15°、20°、30°、40°的情况下,进行了GPS、BDS、GPS/BDS、GPS/GALILEO、BDS/GALILEO、GPS/BDS/GALILEO伪距单点定位解算。结果表明,GPS/BDS/GALILEO组合系统在X、Y、Z各方向的定位精度都优于单系统,定位结果更加稳定,尤其在截止高度角达到30°、40°时,单系统的定位精度急剧下降,历元可用率降低,而GPS/BDS/GALILEO组合系统仍能满足定位的要求。Aiming at the difference of GPS,BDS, GPS/BDS,GPS/GALILEO, BDS/GALILEO, GPS/BDS/GALILEO intermodulation pitch single point positioning accuracy, the multi-system fusion pseudo-range single point positioning The mathematical model and the error term processing method are studied. According to the experimental data of Hong Kong CORS station HKNW site, in the case of cut-off satellite elevation angles of 10, 15, 20, 30, and 40 degrees, the GPS, BDS, GPS/BDS, GPS/GALILEO, BDS/GALILEO and GPS/ BDS/GALILEO pseudo range single point positioning calculations are carried out. The results show that the positioning accuracy of GPS/BDS/GALILEO system is better than that of single system in X, Y and Z directions, and the positioning result is more stable. Especially when the cutoff height angle reaches 30° and 40°,the positioning accuracy of single system The GPS/BDS/GALILEO combination system can still meet the requirements of positioning.

关 键 词：GPS BDS GALILEO 截止卫星高度角 定位精度 

分 类 号：P228.4[天文地球—大地测量学与测量工程]