In this paper, we present a new approach for carrier-phase-based precise point positioning (PPP) algorithm and investigate its positioning accuracy through some experiments under various circumstances. The algorithm is based upon GR (GNSS Regression) matrices as well as GR equations which the authors have firstly introduced and shown preliminary results in [1, 2]. And the concept of our PPP algorithm is that the algorithm can be implemented without external information as much as possible. The derived RTK positioning algorithm can achieve the positioning accuracy in decimeter level.
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