Precise point positioning using GPS and compass observations

Abstract

The Compass Navigation Satellite system, which currently provides more than 12 satellites with three carrier signals, already satisfies the requirement of stand-alone positioning in the Asia-Pacific regional area. First an initial introduction and performance assessment of dual-frequency un-differenced precise point positioning (PPP) for GPS and Compass is presented, the results of which indicate that centimeter-level positioning accuracy of Compass-PPP is comparable to that of GPS-PPP. Then the combined GPS + Compass dual-frequency PPP model is introduced, followed by a numerical performance analysis and comparison with single GNSS-PPP. The results show that the combined GPS + Compass PPP can shorten the convergence time, but not necessarily improve positioning results by much if the satellites of the single GNSS system already have a good receiver-satellite geometry. © 2013 Springer-Verlag Berlin Heidelberg.