Approximation of the Disturbing Potential through GPS measurements

Heights´ determination through GPS measurements demands precise approximation for Quasigeoid´s surface, if we use normal heights, or for Geoid´s surface, if we use orthometric ones. Hence, estimation of the Disturbing Potential either on the Earth surface or on the surface of the Geoid is a must. At the same time, it is necessary to reduce the scope of future leveling to the minimum required for precise heights´ determination through GPS measurements. This paper reviews the algorithm of approximation of the disturbing potential through GPS measurements performed on benchmarks and astronomic points.