From my homepage http://webland.lion.cc/vorarlberg/280000/sonne.htm
you can download "analemm.zip". It is the spreadsheet containing Rogers
SeasonalMarkers. And there is also included a short explanation of these markers
and information about the exactness
Helmut Sonderegger
----- Original Message -----
Sent: Saturday, October 26, 2002 4:48
PM
Subject: Bailey Point Functions
Hi Heiner:
> Thanks for speedy reply.
> Do you have jpeg of
the image?
> Saw the Bailey Points on your website
> and
understand the principle of it.
> But how do you actually read times for
sunrise and sunset?
> Is it the time on the Time Ribbon?
> Who is
this Mr. Bailey? That is incredible.
> Do you have more info on the math
of it?
Here is the drawing of Roger Bailey's Seasonal Markers and
how they function. Roger is a Canadian member of NASS and is hosting the
NASS conference next year in Banff. He specializes in analemmatic
sundials. Contact him for a mathematical explanation of his Bailey
Points. ([EMAIL PROTECTED])
Since some people don't know how the Bailey Points are used
to tell the times of sunrises & sunsets, here is a drawing that explains
them. If you stretch a string from a date on the dateline out beyond the
Time Ribbon so that it passes through the East Bailey Point (Seasonal Marker),
it will tell you the time of sunset on that date. In this drawing, as an
example, the purple line shows the time of sunset on Nov. 1. A similar
line through the West Bailey Point will give you the time of sunrise on that
date. Real simple!
> > ----- Original Message
-----
> > From: Heiner Thiessen,
> > To:
[EMAIL PROTECTED]
>
> Sent: Friday, October 25, 2002 1:52 AM
> > Subject:
Your analemamatic
> > Dear John,
> > I
visited your website and was very impressed by your
> >
beautiful analemmatic dial. You say under 'Functions' that it reads
>
> times for sunrise and sunset as well as standard time after
>
> adjustment. How does that work? Still learning.
> >
Heiner Thiessen
> > 51 00 43N
> > 00 56
36W
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