基于地球重力场模型的区域高程转换方法

Method of regional height transformation based on earth gravity field model

利用多项式分区拟合与EGM96地球重力场模型相结合的数学方法,使少量的水准点与GPS点重合,对GPS测得的大地高直接转换为具有厘米量级正常高的重力模型区域高程转换方法作了讨论,将该方法得到的正常高与单独利用多项式分区拟合和EGM96地球重力场模型得到的结果进行了比较,其差值的标准差为±2.9 cm。

Using the mathematical method of polynomial sub-regional fitting in combination with EGM96 model in earth gravity field,i.e.a small quantity of bench marks coinciding with GPS points,the authors discussed the gravity model method for regional height transformation between GPS geodetic height and normal height with centimeter magnitude.The normal height compared with the result from only by polynomial sub-regional fitting in combination with EGM96 model in earth gravity field,its difference standard error is ±2.9 cm.