接收机天线相位中心变化对PPP解算的影响研究

Research on the influence of receiver antenna phase center variationon the precision point positioning resolving

针对精密单点定位(Precise Point Positioning,PPP)解算过程中,接收机毫米级天线相位中心变化(Phase Center Variations,PCV)误差对PPP解算位置、时间及大气对流层参数的影响问题,采用PPP算法模型对国际全球导航卫星系统(Global Navigation Satellite System,GNSS)组织分析中心BRUX测站一周的实测数据进行实验,使用多系统自动精密定位软件(Multi-GNSS Automatic Precise Positioning software,MG-APP)研究毫米级PCV误差对PPP解算参数的影响。验证结果表明,毫米级PCV误差对高程定位误差影响较大,对水平方向定位误差的影响较小,对计算天顶对流层和接收机钟差参数会产生较大的系统性常偏误差。

In the precise point positioning(PPP)resolving process,the influence of millimeter-scale antenna phase center variation(PCV)errors of the receiver on the PPP solving position,the time and the atmospheric tropospheric parameters is investigated.The PPP algorithm model is adopted to conduct experiments on the one-week measured data from the BRUX station of the organization and analysis center in the international global navigation satellite system(GNSS).The impact of millimeter-scale PCV errors on PPP resolving parameters is analyzed with the multi-GNSS automatic precision positioning(MG-APP)software.The validation results of the measured data show that the millimeter-scale PCV error has a large impact on the elevation positioning error,a small impact on the horizontal positioning error,and a large systematic constant bias error is generated for the calculation of the zenith troposphere and the receiver clock difference parameters.