Hello Carol: (c.c Sundial List)
I'm back home and this morning I'm looking at your
wall declination measurements. Unfortunately, I am not accustomed to using
the nail method you used and I hesitate to comment because I don't want to make
a mistake. I have heard of this method however. I am
Hello
John ,
the
values written by Carol are all correct and very accurate and her wall faces
exactly 1 deg 13 8 west of south
In
astronomy the azimuth values start from north and therefore a value of 209 deg corresponds, for the dialist, to
29 degs from South toward West.
Regards
I think the measurement of the wall declination with the nail method done
by Caroil is correct.
The azimuth of the sun is 29deg 44min 31sec west of south on the mentioned
place and time.
And thus the wall declination is:
29deg 44min 31sec - 28 deg 31min 23sec = 1 deg 13 min 8 sec west of
south
Gianna got in before me with the answer to your question.
I use a version of the "nail in a board" method myself. I like to take several measurements, preferably over a couple of hours, to improve the accuracy of the measurement. As well as the horizontal position, I also record the vertical
John Carmichael wrote:
Subject: Wall Declination Measurement
Hopefully, somebody from the sundial list will help us.
This is my own preferred method of determining wall declination but,
before originally adopting it, I needed to be sure that
a) the 'nail' was truly pependicular to the
I wrote a program that determines declination of a vertical wall using just a
watch and a carpenter's square. It gives very accurate results if performed
when the square's shadow is long. Be certain to follow directions closely,
and measure the edge of the shadow as described in the method.
I've got that drawing of your somewhere but I can't locate it. Could you
please send me a copy?
thanks
John
- Original Message -
From: tony moss [EMAIL PROTECTED]
Cc: Sundial List sundial@rrz.uni-koeln.de
Sent: Monday, November 29, 2004 9:46 AM
Subject: Re: Wall Declination
Hi all,
Many thanks for the enquiries about the drawing/jpeg I offered.
I'll post a collective response later in the week when enquiries have
ceased.
Tony Moss
-
Hello Tony,
I think that was before my time.. gnomonically speaking.
Would you include me on your list please?
Thanks
Rudolf Hooijenga
52-30N 4-40E
-Oorspronkelijk bericht-
Van: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Namens tony moss
Verzonden: maandag 29 november 2004 22:45
Aan:
