一种适用于CORS省级大地水准面模型简易建立方法

摘要

After CORS be established , Geoid model must be created For conversion between geodetic height and elevation. In order to improve its efficiency and precision, This paper presents a simple method based on EGM2008 and less GPS/level data of establishing provincial geoid model. which consider the benchmark system deviation through a simplified mathematical model, and Select exponent of 2 anti-weighted distance method for fitting height anomaly field residuals. Finally ,established a provincial high-precision geoid model in short time, After testing and engineering applications,the results show that the accuracy is credible, Can significantly improve the conversion efficiency.%CORS建立后，为进行大地高和正常高之间的转换，必须建立大地水准面模型，为提高其工作效率和精度，本文提出了一种基于EGM2008重力场模型和较少的GPS/水准数据的省级大地水准面模型的简易建立方法，通过简化的并考虑基准系统偏差的数学模型，选择幂指数为2的反权距离法用于高程异常残差场的拟合，较短时间内建立了高精度的省级大地水准面模型。经外业检测及工程应用成果显示，所建立的大地水准面模型精度可信，能够显著提高转换效率。