Frank, you can use "Orologi Solari" to design an analemmatic vertical dial like the one you describe. See the attached example.
Greetings. Gian Casalegno http://digilander.libero.it/orologi.solari/ >----Messaggio originale---- >Da: frankev...@zooplankton.co.uk >Data: 25/01/2011 17.07 >A: "Sundial"<sund...@rrz.uni-koeln.de> >Ogg: altitude dial > >Greetings, fellow dialists, >I seek enlightenment. I understand that both analemmatic dials and the >secondary dials of double horizontals are azimuth dials and both are >based on the stereographic projection . The time curves on the double >horizontal dial are multiple and dependent on the date while the single >ellipse of an analemmatic dial is achieved through the movement of the >gnomon north-south through the year. > >Almost every possible form of dial seems to have been devised already >but I have not come across an altitude dial resembling an analemmatic >dial in that the gnomon is moved with the seasons and the time curve is >a single ellipse. The shepherd's dial is an altitude dial but with a >gnomon fixed in place and more resembles the form of the double >horizontal dial. Does an altitude dial with seasonally moving gnomon >exist anywhere? Any help? >Frank, 55N 1W > >--------------------------------------------------- >https://lists.uni-koeln.de/mailman/listinfo/sundial > >
vertical analemmatic.pdf
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