The Global and Regional Navigation Satellite Systems (GRNSS) with positioning, navigation and timing (PNT) services are widely used in various navigation applications. Accurate position estimation is the key parameter for any GRNSS. Currently, NavIC is in operational and Galileo is under development. In this paper, the comparative analysis of various parameters of standalone Galileo and the standalone IRNSS (Indian Regional Navigation Satellite System) /NavIC (Navigation with Indian Constellation) satellite configurations are investigated. These parameters are horizontal accuracy parameters, DOP’s (Dilution of Precision) measurements and satellite visibility. To evaluate the performance of Galileo and NavIC, two successive days 13th and 14th August 2018 are considered. The data is acquired from two static mode GNSS receivers located at AGRL (Advanced GNSS Research Laboratory), University College of Engineering, Osmania University, Hyderabad, INDIA (17°24’28.07"N, 78°31’4.26"E). The results show that Galileo and NavIC systems have significantly shown better performance in terms of considered parameters over the observed periods. This work will be helpful in the integration of NavIC with Galileo for better position accuracy for civilian navigation applications.
