基于非线性半参数模型的城市群似大地水准面系统误差研究

The Study of City Group of Quasi-geoid System Error Based on Nonlinear-Semiparametric Model

全球重力场模型EGM96是全球性大地水准面模型,由该模型确定的重力大地水准面与测区似大地水准面存在一个系统差值。本文引入非线性半参数模型非参数分量表示系统误差,进行数据处理,与传统的多项式拟合法比较,证明非线性半参数方法求解结果更好。

Because of the global gravity field model EGM96 is the global geoid model, the model determined by gravity and geoid and quasi-geoid measuring area there is a systematic error. This paper introduces the Nonlinear Semi--parametric Model nonparametric component representation system error to process the data. Compare with the traditional polynomial fitting, nonlinear semi parametric method for solving results proves better.