Try here:
http://mintaka.sdsu.edu/GF/explain/atmos_refr/dip.html
Makes perfect sense to me....
Turns out that I am 1.5 meters tall, I have 6.4 eyes and Vr is 106Kts. A square 3/6.4 x 106 is about 0.00068 times the spped of light and Adrian is 0.039°.
Hey, if that's what the Eng gets then who am I to argue.