广域差分参考站两种伪距平滑算法的再评估  

Re-evaluation of Two Carrier Smoothed Code Algorithms for WADGPS Reference Stations

作　　者：何海波[1] 郭海荣[2] 李保利[2] 

机构地区：[1]武汉大学测绘学院,湖北武汉430079 [2]信息工程大学测绘学院,河南郑州450052

出　　处：《测绘学院学报》2005年第3期157-159,共3页Journal of Institute of Surveying and Mapping

基　　金：河南省自然科学基金项目(0424220021)

摘　　要：广域差分GPS系统(WADGPS)参考站上,需要利用载波相位平滑伪距算法来减小多路径效应的影响.伪距平滑算法有Hatch滤波和加权Hatch滤波两种.文中基于我国WADGPS参考站的实际数据,对这两种平滑算法进行重新评估.实际数据显示,如果不能获得可靠的伪距观测值的方差,在抑制伪距中噪声的影响方面,Hatch滤波明显优于加权Hatch滤波.A carrier phase smoothing algorithm is generally utilized to reduce multipath on pseudorange measures for Wide Area Differential GPS（WADGPS） Reference Stations（WRS）. The candidate algorithms have Hatch filter and weighed Hatch filter. In this paper, the two algorithms are re-evaluated based on the real date form WAAS receiver. The test shows that Hatch filter is much better than weighted Hatch filter for reducing multipath on pseudorange measures when the pseudorange variance is not known well.

关 键 词：GPS WADGPS WRS HATCH滤波 加权 HATCH滤波 

分 类 号：P228[天文地球—大地测量学与测量工程]