New Preprint Explores Lunar Tidal Response-Induced Clock Frequency Variations on the Moon

A new preprint submitted to arXiv investigates the fractional frequency shift (FFS) caused by the lunar tidal response (LTR) between two clocks placed at different positions on the Moon. As clock performance improves, the instability and uncertainty of clock FFS become comparable to that caused by LTR, necessitating this study. The research uses the Keplerian expansions method to analyze FFS to the level of 10^-18, considering the Moon's elliptical orbit for a more accurate representation. This work is preliminary and has not yet been peer-reviewed.