Programa de processamento de efemérides de satélites GPS: aplicação em posicionamento de satélites e posicionamento geodésico.

Abstract

The use of positioning techniques for high -precision and precision, using the Global Positioning System, have been established as a permanent solution to obtain the coordinates of points on the surface, in several applications, particularly those involved in completion of the registration in urban areas and construction of the database associated with Geographic Information Systems used in land management. GPS receivers store the information of the satellites in own format initially, but most users do not use this format to work, but the RINEX format. Since this is an important format to work with GPS, the proprietary software that usually accompany the receivers and make the transformation of its own format to RINEX, the observable process in an exclusive and closed, not allowing change your source code (which sets up a "black box "). This work aims to develop and implement a program with open source code for reading and manipulating files transmitted ephemeris and precise Global Positioning System - GPS and apply it to the position of artificial satellites, and also a study of the behavior of the same in geodetic positioning of points on Earth's surface. Considering that the ground position of the satellites directly influences the calculation of the position of points on the surface, this study finds that it is possible to get coordinates from the satellite ephemeris transmitted consistently, and this is done using the processing that the program is to properly handle the RINEX files. The program implemented is capable of handling files in format RINEX and SP3: reading, extracting and using information to an application of terrestrial positioning GPS satellites, and may also perform other applications such as geodetic positioning points of adapting the source code for other models. The program may be used for the benefit of professionals working in various applications involving satellite geodetic positioning, providing flexibility to work because the program will be open source.