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Author

mengqi qiang

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Open access Oct 2026

Elevation-cutoff-dependent convergence and steady-state performance of LEO-augmented multi-GNSS PPP time transfer

Under restrictive elevation-cutoff conditions, Global Navigation Satellite System (GNSS) precise point positioning (PPP) time transfer can suffer delayed convergence because fewer satellites are available and the timing geometry degrades. However, it remains unclear whether low Earth orbit (LEO) geometric augmentation...

Tian-Pei Liu, Daqian Lyu, Pu-Long Nan et al. · 0 citations
Aug 2026

Enhancing the continuity and robustness of Galileo HAS PPP time transfer with a novel adaptive clock model

Precise point positioning (PPP) is a cornerstone technology for delivering high-precision spatiotemporal transfer in Global Navigation Satellite Systems (GNSSs). Although the Galileo high accuracy service (HAS) improves static PPP timing and time transfer, practical applications remain limited by observation noise, tim...

Xu Fan, Lu Qian, mengqi qiang et al. · 0 citations

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