不同接收机天线相位中心改正模型对GPS/BDS精密定位的影响

Effect of phase center correction models of different receivers on GPS/BDS precision positioning

针对国产不同品牌不同型号的地面接收机天线相位中心(antenna phase center,APC)模型及仪器厂商模型差异,本文分别采用相对定位及精密单点定位(precise single-point positioning,PPP)方法,分析了GPS/BDS高精度定位中基于不同APC改正模型引起的站点估计位置差异,获得了各不同天线APC改正模型对站点估计位置影响的平均差异值.试验结果表明:不同APC改正模型对站点定位精度的影响相当,对站点估计位置在平面方向影响较小,U方向影响较大;同一种类型的天线在不同实验区域造成的影响具有较好的一致性;同品牌天线对站点估计位置的影响有一定的相似性,尤其是同品牌系列产品其相位中心的影响更为接近.

In view of the difference of antenna phase center(APC)model and instrument manufacturer model of domestic ground receiver of different brands and models,relative positioning and precise single point positioning(PPP)methods are adopted respectively in this paper,based on the analysis of the difference of the estimated position caused by different APC correction models in GPS/BDS high precision positioning,the average difference value of the influence of different APC correction models of each antenna on the estimated position of the station is obtained.The experimental results show that different APC correction models have the same effect on the positioning accuracy of the station,but have little effect on the estimated position in the plane direction and the elevation direction.The influence of the same type of antenna on the different experimental area is consistent,and the influence of the same brand antenna on the estimated position of the station is similar,especially with the brand with the series of products its phase center closer to the impact.