Author

Xin-Yun Cao

3 papers indexed here

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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. · Frontiers in Astronomy and S... · 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. · Measurement science and tech... · 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. · Frontiers in Astronomy and S... · 0 citations