Abstract:

[Objective] Aiming at the performance of the satellite clock offset calculated by precise point positioning- real-time kinematic (PPP-RTK) geometry-fixed model, relevant experiments were carried out to test the capability level of satellite clock offset estimates in traditional GNSS applications. [Methods] The performance of clock offset estimates is evaluated by comparing the solved clock offsets with the international GNSS service (IGS) precise clock products and applying it to kinematic precise point positioning (PPP). [Results] The accuracy of the satellite clock offsets calculated by the epoch-by-epoch strategy of the geometry-fixed model is evaluated, and it is verified that the accuracy can meet the enhanced information requirements of sub-meter-level accuracy of traditional GNSS applications. [Conclusions] PPP-RTK is a new high-precision positioning technology, and it can provide various augmented information. As one of the augmented information generated by the geometry-fixed model of this technology, the satellite clock offset can not only serve the end-user of PPP-RTK but also be compatible with traditional applications that require satellite clock offset.

Key words: GNSS, satellite clock offset, PPP-RTK, precise point positioning, geometry fixed model