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    Re: sunrise/set and twilight calc.
    From: Keith Pickering
    Date: 1997 Feb 10, 11:11 EST

    Check out:
    Astronomical Formulae for the Calculator
    by Peter Duffet-Smith
    Cambridge University Press, 1989(?)
    Designed primarily for the amateur astronomer, but full of useful stuff
    for navigators, too.
    Keith Pickering
     ----------
    From: RSHER
    To: navigation{at}XXX.XXX
    Subject: sunrise/set and twilight calc.
    Date: Monday, February 10, 1997 8:30AM
    Does anyone know the simple formula for calculating sunrise or set and
    times of nautical and civil twilight.
    regards
    Russell  -- rsher{at}XXX.XXX
    

       
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