At the recent NASS conference in Vancouver I introduced a new variety of azimuthal volvelle sundial based on the solution to this very question. At some point it will appear in an article in The Compendium.
Fred Sawyer On Sat, Jul 20, 2024 at 10:02 AM John Goodman via sundial < sundial@uni-koeln.de> wrote: > Diese Nachricht wurde eingewickelt um DMARC-kompatibel zu sein. Die > eigentliche Nachricht steht dadurch in einem Anhang. > > This message was wrapped to be DMARC compliant. The actual message > text is therefore in an attachment. > > > ---------- Forwarded message ---------- > From: John Goodman <johngood...@mac.com> > To: Alfred Galvagnon <galvag...@gmail.com> > Cc: Sundial List <sundial@uni-koeln.de> > Bcc: > Date: Sat, 20 Jul 2024 10:01:38 -0400 > Subject: Re: Azimuth Calculation > Thanks for the reference. My ultimate objective is to find the sun's hour > angle on a given day, in a given location, when it reaches a selected > azimuth. > > If I understand this paper, it's starting with equatorial coordinates and > calculating an azimuth, which is sort of flipping my problem around. > > > On Jul 19, 2024, at 2:56 AM, Alfred Galvagnon <galvag...@gmail.com> > wrote: > > > > Maybe this article will help. > > > > > https://www.academia.edu/32880342/Non_current_ephemeris_for_approximated_calculations?source=swp_share > > > > Alfonso Pastor Moreno > > galvag...@gmail.com > > --------------------------------------------------- > > https://lists.uni-koeln.de/mailman/listinfo/sundial > > > > --------------------------------------------------- > https://lists.uni-koeln.de/mailman/listinfo/sundial > >
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