We demonstrate high-precision free-space time and frequency transfer (FSTFT) based on laser in the presence of motion with digital phase-locked loop. Radio frequency with 1 GHz and time signal with one pulse per second (1 PPS) are transmitted over 108 m indoor atmospheric link. The experimental results reveal remarkable frequency stability with instabilities of 1.5E-14 at 1 s and 8.0E-16 at 100 s, even in the presence of a time-varying link characterized by speeds of ± 1.5 m/s. And time interval transfer of 1 PPS signal with 32 ps standard deviation of time delay jitter is obtained.
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Shi et al. (2024) studied this question.
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