EGM2008和加权整体最小二乘在GPS高程拟合中的应用  

Application of Integrated EGM2008 and Weighted Total Least Squares in GPS Height Fitting

作　　者：范昆飞 易桂轩 孔建[3] 刘立[4] 

机构地区：[1]南宁市国土测绘地理信息中心,广西南宁530021 [2]武汉市测绘研究院,湖北武汉430000 [3]武汉大学,湖北武汉430079 [4]浙江省第一测绘院,浙江杭州310012

出　　处：《城市勘测》2016年第6期88-92,共5页Urban Geotechnical Investigation & Surveying

基　　金：南宁市第三批特聘专家科研项目;南宁市人才小高地资助项目

摘　　要：在利用地球重力场模型EGM2008结合GPS/水准数据计算得到剩余高程异常的基础上,利用加权整体最小二乘(WTLS)方法对剩余高程异常进行三次曲面拟合,获得更加精确的GPS高程拟合模型。通过对CORS系统GPS/水准数据的拟合和外部精度检核表明,综合EGM2008和WTLS方法能够显著提高GPS高程异常拟合精度。Based on the calculation of the residual height anomaly by using the earth gravity model EGM2008 and GPS/leveling data, the weighted total least squares （WTLS） method is employed to carry out the three curve fitting of the residual height anomaly and obtain more accurate GPS height fitting model. The fitting of the CORS network GPS/level data and the external precision test show that, comprehensive EGM2008 and WTLS methods can significantly improve the accuracy of GPS height anomaly fitting.

关 键 词：EGM2008 WTLS 高程异常 三次多项式 

分 类 号：P228[天文地球—大地测量学与测量工程]