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Re: Q: how to calculate refraction at higher altitudes onland?
From: Victor Reijs
Date: 2002 Feb 28, 16:32 +0000
From: Victor Reijs
Date: 2002 Feb 28, 16:32 +0000
Hello Dan,
Beside the refraction (and I have the idea that your deductions are
correct), you still have the horizon dip, which is dependent on the
altitude. So keep that in mind. See also my web pages to calculate these
things:
http://www.iol.ie/~geniet/eng/refract.htm
All the best,
Victor
Dan Allen wrote:
> My guess is that if refraction is stricly due to atmospheric thickness, the
barometric pressure is sufficient, but if there are
> geometrical aspects to refraction (which I know there are since there is no
refraction for a body directly overhead), then elevation
> much above sea level needs to be accounted for separately from barometric
pressure. The question then is, by how much?
--
URLs: http://www.iol.ie/~geniet
http://www.iol.ie/~geniet/eng/archaeocosmology.htm
http://www.iol.ie/~geniet/maeshowe
http://www.iol.ie/~geniet/setrise
http://www.iol.ie/~geniet/irishstones
http://www.iol.ie/~geniet/stpatrick
