MX's calculations remember something that was said in an undergraduate
physics course I took: "Assume a spherical cow. . . "

On Jan 1, 6:05*pm, wrote:
Tina wrote:
You can be fairly sure he used someone else's equations for line of
sight. I'd bet a significant sum he could not derive them himself. He
and Euclid would not have gotten along.

True and the equations are easy to find on the internet, but they are
all rough approximations.

There is the geometric horizon which assumes the Earth is a perfectly
round billiard ball and the optical horizon which attempts to account
for the fact that the atmosphere bends light and increases the
distance around 10% depending on state of the atmosphere between the
two points.

Given all the ambiguities in the problem, numbers like 92 instead of
"approximatly 90" just show someone can punch numbers into a calculator
without any understanding of the true nature of the problem.

What a surprise.

--
Jim Pennino

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