Good point "K."
John, without a link to Marmet's site I can't check it out. However, before I'd accept his interpretation I'd have to see actual numerical predictions that show how simple refraction in the corona would give a result that matches the precision of the measurement as well as GR does. Hand waving is not acceptable. If his calculations fall outside the error bars of the measurement (and they are very small) and GR's fall within it, then the only scientific conclusion to reach is that Marmet is definitely wrong, and that GR is probably right.
"I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind." - William Thompson, 1st Baron Lord Kelvin
"If it was so, it might be, and if it were so, it would be, but as it isn't, it ain't. That's logic!" - Tweedledee
This isn't right. This isn't even wrong. - Wolfgang Pauli