This paper puts forward, in the point, gravimetricgeoid method, geometric geoid method and synthesis method to transform ellipsoid height into orthometric height.
基于此，扼要提出应用重力大地水准面法、几何大地水准面法和综合法将GPS椭球高改化为正高的方法。
2
Relative accuracy of regional gravimetricgeoid determination is estimated by an frequency domain analysis, which is determined by regional terrestrial gravity measurements and geopotential model.