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Originally Posted by This'nThat
Rattlesnake Guy's math is quite correct. You'll need to show your exact formulas if you want to challenge him, IMO.
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Actually, the earth's curvature is an integral part of the calculations, and is represented by the earth's Diameter in the formula. The Line of Sight calculation is really simply a tangental formula. Once the tangent is marked along the curvature, the actual formula is the simple Pythagorean algorithm.
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OK. Tail between my legs.
I used the formula to solve the distance to the horizon over 1 mile. I then (incorrectly) applied the curvature per mile on a linear basis. The earth isn't linear.
... off to McDonalds to fill out my job app.