Evaluation and comparision recent global geopotential model in Serbia

Abstract

Within this paper the evaluation and comparison test of a series of global geopotential models (GGM) is shown using available terrestrial data from the territory of Serbia. Using the model of European Improved Gravity 6C2 (EIGEN-6C2), then the model of Gravity Observation Combination 02S N 03S (GCCO02S and GCCO03S) as well as the model of the Earth Gravitational Model 2008 (EGM08) the anomalies of free air in 98776 points of gravimetric survey of Serbia were determined as well as the height anomalies in 1073 points wherein the discreet values of height anomalies were known. The discreet values of height anomalies were calculated as differences between orthometric heights, determined by high precision levelling and the ellipsoidal heights determined by global system for positioning (GPS/dh), and in the points of gravimetric survey of Serbia the free air anomalies related to the Geodetic Reference System 1980 (GRS80) and to the International Gravity Standardization Net 1971 (IGSN71) were determined. Along with all mentioned above the results gained by using said models were separately compared with the data obtained by using the Earth Gravitational Model 1996 (EGM96).