基于二次曲面的拟合推估法在GPS高程测量中的应用

Application of collocation model based on quadric surface in GPS leveling surveying

针对GPS水准拟合常用的多项式拟合模型、多面函数拟合模型和加权平均拟合模型存在的缺陷,采用最小二乘拟合推估的方法提高拟合精度,并通过某工程实例比较和分析,认为该拟合方法比单一模型精度更高、稳定性更强且具有较高的可靠性和实用价值。

Aiming at the defects of three single fitting model which used in GPS leveling： polynomial fitting model,multiquadric fitting, weighted average mode, collocation based on polynomial model is introduced in the paper. By analyzing and discussing the data surveyed from one project, this article draws effective conclusion that this new methods has more reliability and pratical value because of higher accuracy and stability.