一种基于综合模型的GPS高程优化方法  

Method of GPS Elevation Optimization Based on an Integrated Model

作　　者：惠振阳 程朋根[1,2,3] 鲁铁定[1,2,3] 王乐洋 胡海瑛[3] HUI Zhen-yang;CHENG Peng-gen;LU Tie-ding;WANG Le-yang;HU Hai-ying(Key Laboratory for Digital Land and Resources of Jiangxi Province,East China University of Technology,Nanchang 330013,China;Key Laboratory of Watershed Ecology and Gographical Environment Monitoring,Nanchang 330013,China;School of Geomatics,East China University of Technology,Nanchang 330013,China)

机构地区：[1]东华理工大学江西省数字国土重点实验室,江西南昌330013 [2]流域生态与地理环境监测国家测绘地理信息局重点实验室,江西南昌330013 [3]东华理工大学测绘工程学院,江西南昌330013

出　　处：《东华理工大学学报（自然科学版）》2020年第6期565-569,共5页Journal of East China University of Technology(Natural Science)

基　　金：国家自然科学基金(41801325,41861052);国家重点研发计划(2017YFB0503704);江西省教育厅科技项目(GJJ170449);东华理工大学江西省数字国土重点实验室开放研究基金资助项目(DLLJ201806);东华理工大学博士启动基金项目(DHBK2017155)。

摘　　要：在实际应用中常需要将GPS测量得到的大地高转换成正常高,为获得高精度正常高,拟合出高精度的高程异常是非常重要的。传统的求解高程异常方法无法在复杂地形下拟合出高精度高程异常。为解决此问题,提出一种融合加权均值法和多项式曲面拟合法的综合模型方法来求解高程异常。该方法在多项式曲面拟合方法的基础上加上地形改正,使其在高程异常起伏较大的区域同样能达到较高的拟合精度。通过工程实例验证,该综合模型方法相较两种传统的方法在复杂地形环境下能够获得更好的内符合精度和外符合精度。In practical engineering applications,it is often necessary to convert the geodetic height obtained by GPS measurement to normal height.In order to obtain high precision and normal height,it is very important to fit high-precision elevation anomalies.The traditional method of solving elevation anomalies cannot fit high-precision elevation anomalies in complex terrain.To solve this problem,a comprehensive model method combining the weighted average method and the polynomial surface fitting method was proposed to solve the elevation anomaly.The method adds terrain correction based on the polynomial surface fitting method,so that it can achieve high fitting precision in the region where the elevation abnormality is large.Through the engineering example,the integrated model method can obtain better internal and external accuracy in the complex terrain environment compared with the two traditional methods.

关 键 词：高程异常 加权均值 多项式曲面拟合 综合模型 拟合精度 

分 类 号：P223[天文地球—大地测量学与测量工程]