Evaluation of precise point positioning algorithm based on original dual-frequency GPS code and carrier-phase observations

摘要

A PPP algorithm based on original dual-frequency GPS code and carrier-phase observations was presented. By take full advantage of the dispersive nature of ionospheric delay, the new PPP algorithm estimate it along with some other parameters such receiver position, clock bias, and zenith tropospheric delay. This alternative algorithm could avoid the adverse effect of amplified multipath and measurement errors existing in the ionosphere-free observations. Experiments with static and dynamic data were carried out to evaluate the performance of the proposed algorithm. It''s demonstrated that accuracies of 2∼8 cm and 10∼30 cm can be achieved for static and kinematic positioning respectively.