Development and analysis of methods for GPS carrier phase double differences forming

摘要

In this thesis various methods of reference satellite determination, used for carrier phase double differences forming are tested and analyzed. First, the theoretic introduction is made to enlighten the scope of our research. Hereinafter our research on finding and programming the optimal method for reference satellite determination using Dijkstra’s algorithm is presented. The method is based on theoretical assumptions found in literature. Whole research process and programs made to implement our method are described in details. In the second part of the thesis we perform a test of newlyuddeveloped and existing methods for reference satellite determination using GPS data processing for baseline estimation. A set of observations from permanent stations that form three baselines with different lengths is chosen in order to test and analyze the effect of individual methods on different baselines. Furthermore, we test how limiting of reference satellite duration and using different altitude limits for reference satellite affect the results of GPS data processing. A comparison is made between developed and existing method, both using different altitude limits for reference satellite. We finish with analysis of results and final conclusions.