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    Re: Astronomical Refraction: Computational Method for All Zenith Angles
    From: Marcel Tschudin
    Date: 2005 Aug 20, 00:55 +0300

    Fred
    
    Adjusting the function getmu(r) was straight forward. I only realised then,
    that the integration needs also to be splited into two parts, one for the
    troposphere and one for the stratosphere. To do so one has to find the
    integration limit of psi between the two. The paper indicates to this by
    using again eq. 2. To my understanding this requires again a
    Newton-Raphson-iteration, but this time searching psi for a given r. It is
    the coding for this additional iteration where I got stuck now. Sorry, but I
    realise that I am just not anymore fit enough for this type mathematics. Do
    you think you may help?
    
    Thanks, Marcel
    
    
    

       
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