VERTICAL FITTING OF GPS MEASUREMENTS

Abstract

The methodological analysis of the author was motivated the fact that his team could apply its GPS techniques directly by using an existing geoid map (GAZSÓ, TARASZOVA, 1984). Regarding the Hungarian particularities, he analysed the sensitivity of the de- termination of elevations above sea level by applying GPS methods to the knowledge of geoid heights. He pointed out the possibility that a 7-parameter transformation of spatial coordinates can provide automatically a linear elevation fitting. To make a global approx- imation to the geoid in Hungary, he derived a third-degree formula with two variables by means of Chebyshev approximation.