Precision study of satellite levelling with using various models of geoid

Wroclaw University of Science and Technology, Faculty of Geoengineering, Mining and Geology, 27 Wyb. Wyspiańskiego St., 50-370 Wroclaw, Poland

^* Corresponding author: anna.buczynska@pwr.edu.pl

Abstract

The main purpose of this study is comparison of orthometric heights of measuring points and the accuracy of these heights depending on selected geoid model and measurement method. In addition, for better understanding of the essence of conducted research, paper provides information about:

• geoid and other surfaces used in geodesy to describe the terrestrial globe,

• modelling methods of equipotential surfaces and data that can be used to develop them,

• the most important geoid models developed for the area of Poland and the world,

• the technique of determining the orthometric heights using various measuring methods.

Heights of two measuring points, located on the premises of Wrocław University of Science and Technology, were determined to achieve thesis statement. The scope of the study is limited to determining the orthometric heights of points for three global geoid models and four geoid models developed for the area of Poland. Among the selected equipotential surfaces were: geoida niwelacyjna 2000, GUGiK 2001, GEOIDPOL 2008A/C/CN, PL-GEOID-2011, OSU91, EGM96 and EGM2008.