It's been explained to you already, Jack. Review one of your old threads, instead of sidetracking this one:
[thread=100974]Sagnac and the earth's orbit[/thread]
[post=2541478]Relativity of simultaneity[/post]
You did not solve this issue as I have not brought it up before.
So, why does MMX satisfy SR without a Sagnac and GPS with a sagnac also satisfies SR.
Perhaps I can help you with an IOP article.
http://qem.ee.nthu.edu.tw/f1b.pdf
Now, if you agree with the article, then you will have to agree with a "local aether" model.
This IOP article demonstrates the problem with the two.
But, it raises an additional problem.
I would think you and JamesR would have tossed this in my face, what with you two understanding SR so well and all.