Vectorized integrity monitoring method for PPP-RTK correction prod-ucts
PPP-RTK correction products serve as fundamental information for achieving the satellite navigation-based positio-ning with high-precision and rapidly convergence simultaneously.Integrity monitoring is a core requirement for ensuring the re-liability of PPP-RTK positioning.The traditional integrity monitoring methods for PPP-RTK correction products suffer from the lack of the monitoring risks allocation tree and the low sensitivity in monitoring multiple faults.These shortcomings cause a decreased availability of the PPP-RTK correction products.In this contribution,a vectorized integrity monitoring method is proposed for PPP-RTK correction products.Based on the minimum protection level criteria,the integrity and continuity risk of PPP-RTK correction products has been allocated.A sequential pre-and post-broadcasting loopback monitoring architecture has been developed in the range domain and the position domain,respectively.The proposed method,implemented with carrier phase observations,incorporates vectorized classification and monitoring,along with the executive monitoring the results of multiple stations.The proposed vectorized integrity monitoring method enhances the sensitivity and availability of the integrity monitoring for PPP-RTK correction products.Analysis of simulation and real-world data indicates that the proposed method outperforms traditional methods in both sensitivity and availability,achieving at least 99％of availability.
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