Enhancement of The Accuracy of GPS Single Point Positioning

Abstract

The main goal of this thesis is to raise the quality of the static PPP technique using private cases to make it convenient for other applications that need higher accuracy depending on single frequency GPS data. In order to achieve the mentioned main goal, several stages were completed. The first stage optimized and validated the factors of the static PPP for the two postprocessing packages (RTKLIB and gLAB), and study the effect of the smoothed code -produced by GPS-S in case of RTKLIB- on the static PPP. The second stage optimized and validated five mathematical models that produce corrections from permanent stations which are synchronized with the tested stations. The third stage applied the optimums of the two previous stages in case of non-synchronization between the tested and the permanent stations to select the optimum case, and to determine its limitation. 7.2 Conclusions Based on the gained results, numerous important conclusions can be extracted. These conclusions can be classified as follow: 7.2.1 Conclusions concerning the selection of the static PPP optimum factors Recall from the results and analysis of chapter four, different conclusions can be mentioned: • Different models and services were optimized for RTKLIB and gLAB software. • The code smoothing decreased the quality of the static PPP due to the different behavior of the C/A and L1 against various errors,