利用多项式拟合与地球重力场模型相结合的数学方法,由小区域少量的GPS与水准重合点,将GPS测得的大地高直接转换为具有厘米量级正常高的实现方法作了讨论,将该方法得到的正常高与单独利用多项式拟合和地球重力场模型得到的结果进行比较,其差值的标准差为±2.8cm.
By mathematical methods of polynomial combining fit with Earth's gravity field, the authors discuss the method that direct transition between GPS geodetic height and centimeter-sized normal height by a few small region coincidence points of GPS points and leveling points. Compared the normal height with the results based on the application of polynomial fit and Earth's gravity field, the standard deviation of the difference is ±2.8 cm.