Precision of satellite based navigation position solution: A review using NavIC data

Abstract

Global Navigation Satellite System (GNSS) provides all-weather, precise Position, Velocity and Timing (PVT) solutions from any point on the surface or near to the surface of the earth. Accuracy and global availability of solutions are the major important attributes for popularization of the system. Currently, various global and regional system (GPS, GLONASS, Galileo, Beidou, NavIC and QZSS) are in operation. Most of users of GNSS are concerned about the quality of solution obtained from the receivers including the researchers. In some published literature the precision parameters have been obtained from position solution in UTM coordinate. In this paper an attempt has been made to briefly review such efforts and discuss about the parameters used for such studies for geodetic coordinate (φ, λ, h) system because, most generic and geodetic high cost receivers provide this type of position solution. A new effort is taken up to calculate the precision parameters of GNSS based position solution in geodetic coordinate reviewing the previously reported literature. The formulas are reviewed and implemented using MATLAB to develop and utility to calculate precision parameters of satellite-based position solution. A new regional navigation satellite system IRNSS/NavIC, developed by ISRO, India has been deployed. IRNSS/ NavIC data has been analyzed using the developed utility as a case study to observe the effectiveness of such parameters. This discussion and the utility would be useful for understanding the process of GNSS data analysis for studies related to accuracy and precision.