The celestial bodies (like the Earth) are rotating around their axes in the surrounding, warped by the celestial body itself stationary space of the local “time-spatial domain”.
In the local time-spatial domain “near the Earth’s surface”, the speed of light in vacuum (in the “ECI coordinate system”) is a constant, which corresponds to the constant local intensity of the gravitational field. However, in the frame of reference related to the Earth’s surface “light speed anisotropy” (the difference in the speed of light, depending on the direction of the light beam), is a real fact. It is due to the rotation of the celestial body in the stationary “empty space”, where the electromagnetic radiation propagates. The experiments “One-way determination of the speed of light” in the reference system related to the Earth’s surface undoubtedly confirm that the measured speed of light between two fixed points on the Earth’s surface in the direction from “East to West” is higher than the measured speed of light in the direction “West to East”. This difference corresponds to the linear velocity of the Earth’s surface at this latitude. It means that the measured speed of light in different frames of reference is different and obeys – it is a subject of Newtonian mechanics and Galilean relativity. That is why the considered above experiments “One-way light speed determination”, “Sagnac experiment” and “Michelson-Gale-Pearson experiment”, are actually evidence that the measured speed of light in the local time-spatial region “near the surface of the Earth” is not the same for all inertial frames of reference.
Dear truth-seeker! You will be interested to read the analysis of Einstein’s paper“On the Influence of Gravitation on the Propagation of Light” (Einstein, 1911):
=> to Analysis of the influence of gravitation in regions with weaker gravitation:
=> to Analysis of the influence of gravitation in regions with stronger gravitation: