Fast Satellite Selection Techniques and DOPs for Multi-GNSS Positioning

GNSS receivers are designed to track more of satellites corresponding to multi-constellation (GPS, GLONASS and Galileo). As the position error is function of DOP, which is a multiplicative factor, selection of subset of satellites with minimal Dilution of Precision (DOP) is crucial. Further, due to possibility of tracking more than 20 satellites, fast satellite selection techniques that provide optimal Dilution Precision DOP with less computational load are essential. In this paper, three prominent fast satellite selection techniques namely Quasi Optimal, Recursive Quasi-optimal and ....... are evaluated for multi-constellation.