摘要
基于GPS水准的阜新市区似大地水准面拟合问题,对获得的高程异常数据采用Huber抗差估计方法剔除粗差,并运用逐点剔除法选取GPS水准拟合的已知点,提高似大地水准面的拟合精度;通过对GPS水准中5种模型的试验比较,得到建立该地区似大地水准面的最佳方案—多面函数法。经闭合差检核,精度可达到四等水准的要求。
The fitting of quasigeoid of Fuxin urban based on GPS leveling is studied in this paper.The Huber robust estimation method is used to eliminate the outliers in the height anomalies.At the same time,the one-by-one elimination method is used to select the known points of GPS leveling and it improves the fitting precision.Then the optimum scheme-multidimensional function method which is used to establish the quasigeoid of the studied area is gotten after the comparison of five experiments of the GPS leveling m...
出处
《测绘工程》
CSCD
2010年第3期47-50,共4页
Engineering of Surveying and Mapping
关键词
似大地水准面
GPS水准
高程异常
残差
内符合精度
外符合精度
quasigeoid
GPS leveling
height anomaly
residual error
inner coincident precision
exterior coincident precision
