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Tian-Pei Liu

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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
Open access Sep 2026

Adaptive clock modeling for real-time GPS/Galileo PPP timing of LEO satellites

Low Earth Orbit (LEO) satellite-borne Global Navigation Satellite System (GNSS) observations play an important role in precise orbit determination and timing applications. However, owing to the complex onboard environment and limitations in data-link conditions, observation interruptions and degraded observation qual...

Shi-Yu Yu, Guan-Qi Liu, Tian-Pei Liu et al. · 0 citations

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