基于二次曲面的周期拟合GPS高程模型的研究  

The research on GPS height model of cycle fit based on quadric

作　　者：石杏喜[1] 熊莹 

机构地区：[1]南京理工大学理学院,江苏南京210094 [2]江苏煤田地质局物探测量队,江苏南京210046

出　　处：《测绘工程》2004年第3期54-57,共4页Engineering of Surveying and Mapping

摘　　要：为了改善GPS大地高向正常高转换的精度,提出了基于二次曲面的周期拟合解算GPS高程异常的新思路。首先用二次曲面函数拟合消除趋势项,然后通过离散傅立叶变换提取频率信息,从而获得各种不同周期函数,高程异常值可以通过各种不同周期函数的叠加来获得。实际数据表明该方法不仅计算简单而且较常规的拟合模型有较好的应用价值。In order to improve the precision from GPS geodetic heights to normal heights, a new method of solving GPS heigh anomaly based on quadric function is advanced. First, the appulsive item is removed through quadric function fit and the frequency information is extracted by disperse, so some different preriod functions can be obtained. The height anomaly can be solved through adding the different period functions. The real data shows that this method not only compute simply but also is better than the routine fit model.

关 键 词：二次曲面 周期拟合 GPS 离散傅立叶变换 高程异常 

分 类 号：P228.4[天文地球—大地测量学与测量工程]