I need some assistance. I understand the formula to calculate the change in altitude of the sun due to refraction. http://en.wikipedia.org/wiki/Atmospheric_refraction#Calculating_refraction What I can’t figure out is once altitude is changed what does that do to all the other co-ordinates of the sun’s position. What I am looking for is a way to calculate the temporal hour including refraction, which is what you would see on an actual ancient sundial. My problem is that the results that I get for the temporal hour including refraction can be up to a fifteen minute difference at the 11th temporal hour, which doesn’t seem right. I am obviously not doing something right. Any help would be appreciated. Thanks, Noam Kaplan 031:39:06 N 035:07:35 E
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