为了将GNSS测量的高程快速转化为正常高,使用山东省某地区点位数据,通过"移去—恢复"法,利用EGM96 和EGM2008 模型构建似大地水准面,对比二次多项式拟合和三次多项式拟合精度,验证该地区最优方案.结果表明,使用二次多项式拟合双线性插值法的 EGM2008 重力场模型拟合精度最高,外符合精度为0.034 m.
Quasi Geoid Refinement and Its Application Based on Gravity Field Model
In order to quickly convert the elevation measured by GNSS into normal height,the quasi geoid is constructed by using the point data of a certain area in Shandong province and the EGM96 and EGM2008 models through the"remove-restore"method,and the quadratic polynomial fitting and cubic polynomial fitting accuracy are compared to verify the optimal scheme in this area.The re-sults show that the bilinear interpolation method EGM2008 gravity field model using quadratic polynomial fitting has the highest fitting accuracy,and the external coincidence accuracy is 0.034m.
geodetic heightnormal heightelevation anomalyEGM96 modelEGM2008 model
NETL
NSTL
万方数据
