Re: sundial society youtube

2012-09-22 Thread koolish 
This may be the proper link:
http://www.youtube.com/watch?v=XO5lJunzE7o


>
>
> Hi everyone,
>
>  I just discovered this video (sundial society youtube) of me
> answering questions about sundials at the Science and Engineering
> Festival in Washington DC.  April 28 2012
>
> Ken Clark
> Elizabethtown, PAhttp://sundial society youtube
>
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
>
>


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Re: Wall declination

2012-09-22 Thread Simon [illustratingshadows 
A sat image gets you close, the azimuth method of measuring the wall 
declination has inaccuracies as well, however it is probably better with enough 
samples. I use the sat image when I feel it is detailed enough for an estimate, 
I verify it with the azimuth method and if close, then I make a model of the 
final dial, if that checks out then I am good to go. I also use an astro 
compass which I like however their acuracy is around 1 degree at best. And of 
course while a magnetic compass (I use a Brunton) can be corrected for megnetic 
variation/declination, remember that magnetic deviation occurs with nearby 
objects. Even clay fired bricks can deflect a magnetic compass by quite a few 
degrees due to a magnetic alignment being established as the fired bricks cool 
down.
 
My main spreadsheet "illustratingShadows.xls" is just one tool, there are many 
excellent tools on the various sundial web sites to choose from.
 
Simon

Simon Wheaton-Smith
www.illustratingshadows.com
Phoenix, Arizona, W112.1 N33.5

From: Charles Beck 
>To: sundial@uni-koeln.de 
>Sent: Saturday, September 22, 2012 4:36 AM
>Subject: Wall declination
>
>
>Hello all, 
>My first post here, another sundial enthusiast.
>Doing my first sundial on a declining westerly wall.
>Can you share your tips to measure the wall's declination as accurately as 
>possible?
>From a sat image I measured 10 degrees tilt.
>With the nail and board method I got 9.2 degrees as an average of a morning 
>and afternoon measurement.
>Can I get more accurate?
>regards
>
>
>Ch.
>
>---
>https://lists.uni-koeln.de/mailman/listinfo/sundial
>
>
>
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Re: Wall declination

2012-09-22 Thread Bill Gottesman 
Charles, for a simple and effective measure see Wall
Declination.pdf
  and WallDeclination.exe.
 I do not know how its accuracy compares to other methods, but it is an
easy method to perform.
-Bill Gottesman

On Sat, Sep 22, 2012 at 7:36 AM, Charles Beck  wrote:

> Hello all,
> My first post here, another sundial enthusiast.
> Doing my first sundial on a declining westerly wall.
> Can you share your tips to measure the wall's declination as accurately as
> possible?
> From a sat image I measured 10 degrees tilt.
> With the nail and board method I got 9.2 degrees as an average of a
> morning and afternoon measurement.
> Can I get more accurate?
> regards
>
> Ch.
>
>
> ---
> https://lists.uni-koeln.de/mailman/listinfo/sundial
>
>
>
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Wall declination

2012-09-22 Thread Charles Beck 
Hello all,
My first post here, another sundial enthusiast.
Doing my first sundial on a declining westerly wall.
Can you share your tips to measure the wall's declination as accurately as
possible?
>From a sat image I measured 10 degrees tilt.
With the nail and board method I got 9.2 degrees as an average of a morning
and afternoon measurement.
Can I get more accurate?
regards

Ch.
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