THE IMPORTANCE OF GRAVITY DATA, DIGITAL ELEVATION MODEL AND GLOBAL GEOPOTENTIAL MODEL EGM96 IN THE QUASI-GEOID HEIGHT INTERPOLATION PROBLEM CASE STUDY AT LOWER SILESIA
quasi-geoid height interpolation
Points with known normal and ellipsoidal (obtained by satellite techniques) heights provides so-called satellite-leveling quasi-geoid models. An accuracy of the model depends on local disturbances of the quasi-geoid course between known points. In the paper there are estimated the disturbances produced by omission in such simple models an additional data like digital elevation model, gravity data and global geopotential model. Test calculations are related to the are of Lower Silesia and concerns mountains, mountains foreland and low-lying area. The analyses was made for the distance of 30 km between known points (approximate, mean distance between POLREF network points). Results of the performed calculations pointed to significant values of examined components for height anomaly interpolation even for low-lying area.
Trojanowicz, M. (2008). THE IMPORTANCE OF GRAVITY DATA, DIGITAL ELEVATION MODEL AND GLOBAL GEOPOTENTIAL MODEL EGM96 IN THE QUASI-GEOID HEIGHT INTERPOLATION PROBLEM CASE STUDY AT LOWER SILESIA. Acta Sci. Pol. Geod. Descr. Terr., 7(3), 15-36.