And even locating a clock to a higher elevation, because gravitational curvature has the same effect as relative motion. https://arxiv.org/pdf/1710.07381.pdf ht

And even locating a clock to a higher elevation, because gravitational curvature has the same effect as relative motion. https://arxiv.org/pdf/1710.07381.pdf https://arxiv.org/pdf/1710.07381.pdf Can't find the reference now but even moving the clock a few meters is a measurable drift.