aLf Posted March 15, 2009 Share Posted March 15, 2009 Just a simple "hows it work" question... I have several fairly elaborate computer programs that arrive at (their) times for sunrise and sunset for an exact Lat/Long, (aviation thing). Each one comes up with a time within 3-4 minutes of each other. ISY included. None of them agree. When you guys programmed ISY, how did you come to the figures that ISY spits out per my Lat/Long? It really doesn't make a hill of beans when you are within a few minutes, I just wonder why a computer algorithm would vary so much from one vendor to the next. Oh and by the way, I have taken my hours and minutes of degrees down to five decimal points. Example, N 42.32.28, W087.51.22 equals, N 42.53800 W087.85367 Again, only an inquiring mind. aLf Link to comment
Michel Kohanim Posted March 16, 2009 Share Posted March 16, 2009 Hi aLf, The algorithm is from NOAA. With kind regards, Michel Just a simple "hows it work" question... I have several fairly elaborate computer programs that arrive at (their) times for sunrise and sunset for an exact Lat/Long, (aviation thing). Each one comes up with a time within 3-4 minutes of each other. ISY included. None of them agree. When you guys programmed ISY, how did you come to the figures that ISY spits out per my Lat/Long? It really doesn't make a hill of beans when you are within a few minutes, I just wonder why a computer algorithm would vary so much from one vendor to the next. Oh and by the way, I have taken my hours and minutes of degrees down to five decimal points. Example, N 42.32.28, W087.51.22 equals, N 42.53800 W087.85367 Again, only an inquiring mind. aLf Link to comment
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