基于EGM2008重力场模型的区域似大地水准面确定

Local Quasi-Geoid Determination Based on EGM2008 Model

研究了利用超高阶地球重力场模型EGM2008以及GPS/水准数据确定区域似大地水准面的方法。基于该方法,计算了某一区域分辨率为2.5′×2.5′的似大地水准面模型,检核结果显示:基于该模型确定的区域似大地水准面的精度要明显优于EGM96模型,内外符合精度均优于5 cm。

The method of local quasi-geoid determination is discussed based on super-high degree Earth gravity field model EGM2008 and GPS/Leveling data in this paper. A local quasi-geoid model with 2. 5＇ ＊ 2.5＇ grids has been determined based on this method, the validated results show that the local quasi-geoid model based on EGM2008 is more accurate than the model based on EGM96 and the inner and outer accuracy of the model is less 5 cm.