Long-term stability of the kinematic Precise Point Positioning for the sea surface observation unit compared with the baseline analysis.

Abstract

Kinematic Precise Point Positioning （PPP） is an effective tool for tracking dynamic positions in the open ocean in support of GPS-A, because it does not require a local terrestrial reference site. In this study, we compared the solutions of the ship-borne 1 Hz GNSS data processed by different software to evaluate the long-term stability of the positioning. The results indicated that PPP solutions were more stable than the differential solutions, which were affected by the perturbation of the reference sites. We also found that the ambiguity-fixed PPP is capable of providing robust solutions, even in situations with loss of data.