According to Quantum FFF Theory, the earth gravity related LASOF ( Local A Symmetric Oscillating vacuum Frame) is dragging the lightspeed inside an ellipsoidal shaped speed transition volume around the earth inside the solar reference LASOF, with full extinction effect at the edges.
The Michelson and Morley experiment observed that at the earth surface there is NO vacuum or ether effect.
However at higher altitudes there seems to be an ellipsoidal transition zone .
Supported by lightspeed outlier comparison between CHAMP tandem satellites done by Tae Suk Bae ( doctoral thesis Ohio state university) see also:
(The O‘Connell effect in eclipsing binaries explained by mass
related light speed extinction distances (LASOF) of stars and even