Hi all,
I am looking for a formula for refraction.
At http://www.sundialsoc.org.uk/glossary/equations/equations.htm ist says:
10. Sun’s refraction
Ro=1/ (tan(a+7.31/(a+4.4)))
Ro is the refraction in arcmins for a temperature of 10ºC and an
atmospheric pressure of 1010 mb. For other conditions, a m
the term "a" in your formula is the Sun's apparent altitude in degrees (see
Chapter 16 of Meuus's Astronomical Algorithms).
On Tue, Mar 16, 2010 at 12:27 PM, Thomas Steiner wrote:
> Hi all,
> I am looking for a formula for refraction.
> At http://www.sundialsoc.org.uk/glossary/equations/equations
Thank you Brad!
I only looked at the explaination, not at the formula itself. Sorry.
Problem solved.
Have a great day!
Thomas
2010/3/16 Brad Lufkin :
> the term "a" in your formula is the Sun's apparent altitude in degrees (see
> Chapter 16 of Meuus's Astronomical Algorithms).
>
> On Tue, Mar 16,
