Akademik Veri Yönetim Sistemi
International Conference “Synergy in Terra – 2026”, Lviv, Ukrayna, 12 - 13 Haziran 2026, ss.1-5, (Tam Metin Bildiri)
The accurate determination of the geoid plays a fundamental role in a wide range of scientific and engineering applications. Achieving a precise geoid solution depends mainly on accurate gravity measurements and high-resolution elevation data. In regions where accurate local elevation data are unavailable, global digital elevation models (DEMs) such as those derived from the Shuttle Radar Topography Mission (SRTM) are widely used. More recently, the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) DEM has emerged as an alternative dataset. In this study, when the accuracies of the geoid models on the Colorado experiment area produced from global DEMs are analysed based on the GNSS-levelling points; RMSE value of the model produced from SRTM DEM is 3.09 cm, while that produced from ASTER DEM is 3.24 cm. The results show that the accuracies of the geoid models produced from SRTM and ASTER DEMs in the experimental area are similar, with the geoid model obtained from SRTM DEM exhibiting approximately 5% higher accuracy than that obtained from ASTER DEM.