I don't know any software, but my approach would be: 1. Use Altitude and Azimuth and Latitude to calculate Declination (straightforwad Spherical Trig calculation. If you need formula, it will take me a moment to come up with it)
2. Calculate dates for the declination (longitude/time zone will matter). This should not be too hard to look up (or should be findable at link below) 3. Calculate time from declination, location, time zone, daylight saving. OR create an azimuth/altitude table for a given date at http://aa.usno.navy.mil/data/docs/topocentric.php . Be sure to select for Apparent Topocentic Zenith Distance and Azimuth. Times are given in UTC. -Bill On Thu, Mar 22, 2018 at 10:47 AM, Dan-George Uza <cerculdest...@gmail.com> wrote: > Dear all, given the azimuth and altitude of a point in the sky, what would > be the best way of finding the dates and times during which the Sun reaches > that point? Is there any software for this? > > Dan Uza > > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > > >
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