On 2023-04-08 8:52 p.m., Michael Ossipoff wrote:
I know you said you wanted a link, not instructions, but people have
been suggesting how to achieve dial-autocorrection to Local True Solar
Time (LTST) at the standard-meridian, instead of one’s own meridian.
So I felt that it would be justified to comment about it.
Michael,
To me, your case seems to be a specific instance that is covered by the
general case - have I missed something?
As things stand, I think I know the math involved because I have from
the article by Fred Sawyer that I mentioned in a previous email. It
describes the solution for the general case - we start with a dial at
some latitude and longitude that shows the solar time at some other
longitude, which may or may not be zero offset. We want to move it to a
new latitude and longitude and to show the solar time at some new
'other' longitude, which may or may not have zero offset from the new
location. As well, the article by Fabio Savian, mentioned in his post,
also discusses dial relocation. (BTW, for NASS members, Fabio only
mentioned his article in its Italian version, but as well he kindly
provided an English equivalent which was included in the most recent
issue of the Compendium)
Everyone,
Since I'm writing this post, I'll take the opportunity to mention that I
have made a couple of small adjustments to my online wedge calculator,
gnomoni.ca/wedge . My thanks go to Roderick Wall for helping me make it
better for the southern hemisphere. Please let me know if you spot any
issues.
Steve
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