Özet:

Precise Point Positioning (PPP) method, which is an absolute positioning technique, allows to obtain position information with a single Global Navigation Satellite Systems (GNSS) receiver. This situation has increased the interest in PPP and Precise Point Positioning-Ambiguity Resolution (PPP-Ambiguity Resolution, PPP-AR) methods in recent years, as it offers cost and time savings, high positional accuracy depending on the observation time, practical solutions, resulting in the development of numerous software programs. In this study, the location determination performance of the software was examined by using Net_Diff and PRIDE software, which allows to obtain location information with the PPP-AR technique developed in recent years. For this purpose, twenty-day (29.10.2022-17.11.2022) observation data of ISTA and MERS International GNSS Service (International GNSS Service, IGS) stations were analyzed. GPS, GLONASS, Galileo and BeiDou satellite systems were used in the evaluations. The results obtained from the software were compared with the reference (IGS daily solution) coordinate values of the stations. In the study, while an average location accuracy of 6.2 mm horizontally and 12.9 mm vertically was achieved by Net_Diff software, location accuracy of 2.7 mm and 5.3 mm was obtained by PRIDE software respectively. The obtained results clearly demonstrate that PRIDE software has higher point location accuracy and sensitivity than Net_Diff software.