几种确定似大地水准面方法比较

The Comparison of Multiple Methods of Determine Quasi-geoid

利用GPS点水准联测数据,通过曲面拟合的方法得到高程异常值;重点探讨了在同一组数据下分别采用二次曲面、多面函数、神经网络和样条函数等拟合方法;通过实例验证这些方法的可行性,同时对各种方法的精度进行了比较。

Combine with the leveling data of GPS,the height anomaly value is obtained by the method of surface fitting.The quadric surface,hardy function,neural network and spline function fitting are discussed,separately under the identical group data.It confirms the feasibility of these methods,and makes a comparative analysis of feasibility of the preciseness of these models through some examples.