Analysis of GPS satellites position determination using MATLAB® environment

Content of this contribution is a MATLAB solution of GPS satellite position evaluation based on generated navigation messages of the satellites. Article is focused on issues of the navigation message information content, ephemeris and data processing for evaluation of the Cartesian and spherical satellite constellation. Except analysis of mathematical solutions, the focus is on the position visualization using MATLAB environment. The issue of satellite position and estimation of the ground object position is closely linked with research of navigation architectures for autonomous and satellite navigation systems on Department of Avionics, Faculty of Aeronautics in Kosice. Given MATLAB solution, which is described in this article, is used for education and also as the basic simulation tool for more complex research of Unmanned Aerial Vehicles (UAV) navigation.