Dear kallog,
Now the Earth's rotation around the sun and simultaneously send a clockwise and a counterclockwise light. If the light along the Earth's orbit circle, they returned to the Earth definitely not at the same time, because the Earth's rotation around the sun. This is the Sagnac effect.
How much difference in time between clockwise and counterclockwise light back to Earth? It is about 0.628 seconds.
China to Japan is about 3,000 km distance. How much difference in time between the clockwise and counterclockwise light from China to Japan? It is about 2000 ns.
The two-way time transfer between China and Japan experiment tells us that electromagnetic waves from China and Japan, Sagnac effect size is about 90ns. It is considered to be caused by the Earth's rotation. But why not find 2000ns be caused by the Earth' revolution?
We must seriously think about these.
Best Regards
Xinwei Huang
