Abstract：Existing triple-frequency cycle-slip processing algorithms are usually not effective, and the threshold setting may be not reasonable for cycle-slip detection and repair under high ionospheric activity. To solve those problems, the triple-frequency total electron contents rate(TECR) method for whittling ionospheric delay is proposed based on the dual-frequency TECR method. Both the triple-frequency TECR method and triple-frequency code-phase geometry-free and ionospheric-free combination in this algorithm can whittle the influence of ionospheric delay effectively and determine reasonable threshold adaptively. Triple-frequency measured data are used to validate this algorithm, and experimental results showed that this algorithm can whittle ionospheric delay effectively and can realize the detection and repair of cycle-slip dynamically under ionospheric active conditions.
