I mentioned several alignments, the correction of any one of which could be used to determine how much the dial-plate should be rotated in its own plane (either before or after the tip).
Most recently I suggested the altitude of the pointing-direction of the style. But it seems to me that it would be easier to correct the pointing-direction of the noon-line to the hour-angle equal to 180 degrees + the westward longitude-offset (the amount by which you want the LTST o a longitude west of yours…& of course negative if you want it for a longitude east of yours). In my example, the longitude-offset way7 degrees. That correction gives a simpler expression for the necessary dial-plate rotation in its own plane. (…which can be done before or after the tip). On Tue, Apr 11, 2023 at 08:52 Michael Ossipoff <email9648...@gmail.com> wrote: > I retract the addendum. I wrote it with the notion that the noon-line > should be under the style. …as if the dial were intended to read for its > own longitude. > > So, sorry—disregard the addendum (…as you probably already have). > > The dial-plate’s rotation in its own plane should be to correct the > style’s pointing-direction (in altitude or azimuth), as I originally said & > described. > > Correcting its altitude would give an easier equation-solution. > > > > On Sat, Apr 8, 2023 at 21:25 Michael Ossipoff <email9648...@gmail.com> > wrote: > >> Addendum: >> >> … >> >> Instead of finding the dial-plate rotation in its own plane that corrects >> the style’s pointing-direction, it might be easier to, instead, find the >> dial-plate rotation in its own plane that puts the dial’s noon-line in the >> meridianal-plane….i.e. gives that noon-line an azimuth of zero. >> >
--------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
