You're welcome. Feel free to share pictures and details of your dial when farther along or done. It's good that you are thinking of such little details in the beginning, as such attention to detail will help ensure a great result, even if a little overkill in the beginning.
Best to you,
Th
Hi Frank, Richard and Thaddeus,
Thanks very much for your comments and URL pointers.
Looks like the differences in the different projections won't make much
difference to me then.
:)
weemeng
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Hi Wee-meng,
For most dials, if you build it correctly and for whatever reason you get a consistant (say 7min) error throughout the year, you can make a correction for it. Just add the correction to the equation of time (ET) or with some dials such as horizontal ones just adjust the way you mou
UT1 is definitively established by the IERS (now called the International
Earth Rotation and Reference Systems Service). UT1 is referenced to the ITRF
(the International Terrestrial Reference Frame) which is basically a set of
points whose coordinates realize the ideal International Terrestrial Re
Dear Wee-Meng
You raise some very interesting points...
> When I read about longitudes/latitudes in GPS articles,
> there are loads of different types of projection used.
Indeed there are. These all represent different models
of the shape of the Earth and the best one is kept secret
by the U.S
Hi,
Another question I have, in books and write ups that I've read, often times,
there are references to longitude and latitudes to specify the dials/gnomon
sizes of sundials.
When I read about longitudes/latitudes in GPS articles, there are loads of
different types of projection used. A common
