基于二次曲面的周期拟合GPS高程模型的研究

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,从而可以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的函数的叠加来获得,实际数据证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.

Research on GPS Leveling Model of Periodic Simulating Based on Conicoid

In order to improve the precision from the GPS mother earth elevation to the normal elevation , a new method of solving the GPS elevation-abnormity-value which is based on the conicoid function is advanced. Firstly, the appulsive item is removed through the conicoid function simulating and use the Disperse Fourier Transfer to solve the frequency, so some different period functions can be obtained. The elevation-abnormity-value can be solved through adding the different period functions. The real data can validate that this method not only computes simply but also is better than the routine simulation model.