DETAILED GEOID DETERMINATION USING THE COMBINATION OF TRUNCATED GLOBAL INTEGRALS AND GEOPOTENTIAL MODEL

In modern geodetic environment the GPS technique is a basic tool for high accuracy positioning. The GPS can be used also for height determination, but because of the different reference systems, this application requires geoid solutions as accurate as the GPS itself, that is better than 1 ppm. The investigation to realize such accurate geoid solution was started at the Satellite Geodetic Observatory in 1986 (ÁDÁM et al, 1988). Following the given gravity data distribution in this area, a special data truncation method was chosen which incorporates local terrestrial gravity data integration and global geopotential model contribution. The review of the data available and the method applied are described here together with the comparative analysis of the different solutions