Selection of the global geopotential model 2008 optimal degree for height anomalies determination

Abstract

This paper presents determination of height anomalies by the means of Global Geopotential Model 2008 (EGM08). Height anomalies were determined at 1073 points over the territory of Serbia, with known discrete values of height anomalies, which were also determined by satellite leveling. For each of the points, cumulative results of determination had been archived during the calculation for each degree, from 0 to 2190, thus 2191 results of determination were at the disposal for a point. The results obtained were compared with the discrete height anomaly values, and it was concluded that the highest quality of approximation for the discrete undulation values is being achieved using only coefficients up to 1181st degree, thus the present paper shall designate it: the optimal degree.