@ARTICLE{Bajracharya_Sujan_Terrain-aliasing_2005,
 author={Bajracharya, Sujan and Sideris, Michael G.},
 volume={vol. 54},
 number={No 1},
 journal={Geodesy and Cartography},
 pages={3-16},
 howpublished={online},
 year={2005},
 publisher={Polska Akademia Nauk/ Komitet Geodezji Polskiej Akademii Nauk; Polish Academy of Sciences / Commitee on Geodesy Polish Academy of Sciences},
 abstract={This paper investigates the terrain-aliasing effects on geoid determination using different gravimetric reduction schemes. The high resolution of digital terrain model (DTM), if available, should be used for every gravimetric reduction scheme since it can precisely map the details of the terrain. The reduction methods used in this study are the Rudzki inversion method, Helmert's second method of condensation, the residual terrain model (RTM) method, and the Pratt-Hayford (PH) topographic-isostatic reduction technique. The effect of using different DTM grid resolutions of 6", 15", 30", 45", I' and 2' on gravity anomalies and absolute geoid undulations is studied for each of these reduction schemes. A rugged area in the Canadian Rockies bounded by latitude between 49°N and 54°N and longitude between 236°E and 246°E is selected to conduct numerical tests. Our results suggest that a DTM grid resolution of 6" or higher is required for precise geoid determination with an accuracy of a decimetre or higher for any gravimetric reduction method chosen to treat the topographical masses above the geoid in rugged areas. The most precise geoid models obtained in this test are the ones obtained using Rudzki, Helmert, and RTM methods with 6" DTM resolution.},
 type={Article},
 title={Terrain-aliasing effects on gravimetric geoid determination},
 URL={http://ochroma.man.poznan.pl/Content/121283/PDF/3_GK_VOL_54_NO_1_2005_Bajracharya_Wplyw.pdf},
 keywords={Aliasing, gravimetric reduction, digital terrain model, geoid},
}