Metrological provision of GNSS-leveling on working standards
Widespread use of GPS / GNSS technology sets the task of determining the normal (orthometric) heights of points. We know that it is necessary to determine the initial level surface – the surface of the geoid / quasigeoid. Determination of the quasigeoid surface can be performed by: 1) a gravimetric readout in the relevant region and building the regional geoid / quasigeoid; 2) a model of potential of gravitational field of the Earth; 3) an interpolation of quasigeoid’s heights on a surface given by leveling reference points, on which GNSS-leveling is carried.