So "distortion" is exactly equal to your model minus observed reality?
How convenient. If only FE had the need for such a clever mechanism, we might envy your ownership of it.
The distortion, according to the author of the page, is calculated according to expected atmospheric temperature and pressure, and is found to be about one third of the complete measurement.
The assertion that the distortion exactly matches the model minus the observed reality is Tom Bishop's very poor reading of the article. The real data provided in the article says that the distortion is about one third of the measurement.
You can argue that the quantification of the refraction due to differing temperatures and pressures of the air is somewhat imprecise, but what you cannot argue is that the article somehow proved a flat Earth.
If you can demolish this article by proving that the refraction is three times stronger than claimed
and opposite in direction from what is claimed, please do so. Otherwise, the article is very bad news for Flat Earthers.