EVALUATION OF GNSS LABORATORY SOFTWARE AND REAL TIME KINEMATIC LIBRARY FOR PROCESSING GNSS DATA

Abstract

Geodesy applications demand comprehensive knowledge of Global Navigation Satellite System (GNSS) data and the associated processing software. Over time, several open software options have been employed for GNSS data processing. The software's accuracy is vital in the various fields where GNSS data finds applications. GNSS Laboratory software (G-LAB) and Real Time Kinematics Library (RTK-LIB) have become widely utilized for GNSS data processing due to their effectiveness and accessibility. In this study, we processed four months’ data (August, October, November, and December) from four Continuous Operation reference stations (CORS) using G-Lab and RTK Lib in static Precise point positioning (PPP) mode. A comparative analysis was performed on the results obtained from both software. The statistical analysis indicates that RTK Lib outperformed G-Lab in data processing, RTK-Lab displays the least RMSE value of Eastings, Northings, and heights with differences in terms of RMSE of 1.750m, 0.538m, and 0.250 m for Eastings, Northings, and Height respectively. The results show that RTK-Lib software is more reliable for GNSS data processing. Future investigations should involve using one year or longer of data and considering more CORS stations to gain further insights