高度角对GNSS多系统组合短基线RTK影响  

Analysis of the influence of altitude angle on short baseline RTK of GNSS multi-system combination

作　　者：罗虹[1] 赵政权[1] LUO Hong;ZHAO Zhengquan(School of National Spatial Information,Yunnan Land and Resources Vocational College,Kunming 652501,China)

机构地区：[1]云南国土资源职业学院国土空间信息学院,昆明652501

出　　处：《导航定位学报》2022年第4期145-152,共8页Journal of Navigation and Positioning

基　　金：云南省地矿局科技创新基金资助项目(2017JJ04)。

摘　　要：为详细评估高度角对全球卫星导航系统(GNSS)多系统组合短基线实时动态差分(RTK)定位精度的影响,推导了五系统组合RTK定位模型,这些系统包括北斗卫星导航系统(BDS)、全球定位系统(GPS)、伽利略卫星导航系统(Galileo)、格洛纳斯卫星导航系统(GLONASS)及日本准天顶卫星系统(QZSS);设计了不同高度角多系统组合短基线RTK解算实验。实验结果表明,多系统组合能有效改善北斗三号全球卫星导航系统(BDS-3)卫星可见数与位置精度衰减因子(PDOP)值情况,且能有效提升BDS-3单独定位精度,尤其是在极端高度角下改善效果最为明显。当高度角达到35°时,BDS/GPS/Galileo/GLONASS/QZSS组合短基线RTK水平定位精度优于1 cm,高程定位精度优于2 cm,相比BDS-3单独定位水平定位精度提升量在40%左右,高程定位精度提升量超过50%,但当卫星数达到一定数量,对PDOP值以及定位精度的改善十分微小。In order to evaluate the influence of altitude angle on the Real Time Kinematic(RTK)positioning accuracy of Global Navigation Satellite System(GNSS)multi system integrated short baseline.The five system combined RTK positioning model was deduced,these systems include BeiDou navigation satellite System(BDS),Global Positioning System(GPS),Galileo navigation satellite system(Galileo),GLObal NAvigation Satellite System(GLONASS)and Quasi-Zenith Satellite System(QZSS).The RTK calculation experiment of multi system combined short baseline with different altitude angles were designed.The experimental results shown,the multi system combination can effectively improve the visibility and Position Dilution of Precision(PDOP)of BeiDou-3 navigation satellite System(BDS-3),and it can effectively improve the positioning accuracy of BDS-3 alone,especially the improvement effect is the most obvious at the extreme height angle.When the altitude angle reaches 35°,BDS/GPS/Galileo/GLONASS/QZSS combined short baseline RTK horizontal positioning accuracy is better than 1cm and elevation positioning accuracy is better than 2 cm.Compared with BDS-3,the horizontal positioning accuracy is improved by about 40%,and the elevation positioning accuracy is improved by more than 50%.However,the PDOP value and positioning accuracy are slightly improved when the number of satellites reaches a certain number.

关 键 词：高度角 多系统组合 短基线 实时动态测量 

分 类 号：P228[天文地球—大地测量学与测量工程]