Precise Point Positioning by Combining GPS and GLONASS

Abstract

In this paper, the combined GPS and GLONASS Precise Point Positioning (PPP) method based on GR (GNSS Regression) model is described. The performance of the combined GPS and GLONASS PPP is assessed using observation provided by the receiver. The corresponding positioning accuracy and convergence time are compared for GPS-only and GPS/GLONASS precise point positioning. The results have indicated a significant improvement on the position convergence time although the improvement is quite dependent on the geometry improvement of the visible satellite configurations. The results also indicate a slight improvement on the positioning accuracy due to limited availability of GLONASS satellites.