Analysis of Geodetic GNSS Survey Measurements

This graduation thesis analyzes the quality of coordinates determined with geodetic GNSS surveying methods. In the first part, the relative methods, RTK and static method are analyzed. The quality of coordinates obtained from terrestrial measurements under different conditions (almost ideal and very poor), is established. Furthermore, the quality of determined coordinates with regard to GNSS permanent station in Ljubljana (GSR1) is analyzed, based on GPS observations only, GPS + GLONASS observations and VRS concept (Virtual Reference Station), which is most used in practice. In the second part, graduation thesis analyses Precise Point Positioning method. It presents the principle of the method, biases and errors that have the greatest impact on the quality of coordinates, and its use in surveying practice. The quality of coordinates depending on the length of time observations, the interval of observations and the registration number and distribution of satellites at the time of observation is analyzed. Than four web providers of PPP method are presented: CSRS-PPP, GAPS, APPS, and MagicGNSS and the differences of derived coordinates and the coordinates obtained with all three methods PPP, static and RTK are analyzed. Finally, the advantages and disadvantages of PPP method, its practical application in present and usefulness of the method in the future are evaluated