Somehow, I thought youd suggest that! :{)
It was going to be my first thought, as well.
Thanks!
Dave
_____
From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of
sun.di...@libero.it
Sent: Saturday, August 24, 2013 2:32 PM
To: Sundial list Sundial list
Subject: R: Re: Orologi Solari n. 2
Dear Dave,
I agree with you on the fascination of this instrument that comes I guess
from its simplicity.
Regarding a software tool to draw the analemma, I cannot avoid suggesting
you my Orologi Solari program, but I am sure that several other programs can
pefectly suit your needs.
The choice between solar and civil time is always a dilemma.
I usually choose civil time, just to avoid a lot of questions about the time
difference between sundial and wristwatch time.
Greetings.
Gian
----Messaggio originale----
Da: db...@thebells.net
Data: 24/08/2013 22.50
A:
Cc: "Sundial list Sundial list"<sundial@uni-koeln.de>
Ogg: Re: Orologi Solari n. 2
Gian, thank you for posting the link to the new issue!
I was particularly taken by the lovely and simple polar dial/meridiana at
Certosa di Vedana.
I believe I am going to have to build one for my home; it will be a nice
piece for my front yard (South-facing.)
Can you or anyone else on the Sundial List recommend one of the several
pieces of software that have been graciously made available to us, that can
most easily create a plot of the analemma for a specific location on an
equatorial plane?
I have been experimenting with apertures and roughly sizing the piece, and
it works very well with a "pinhole" of 5 to 10 mm diameter and a centerline
distance of ~50 cm. Adding a 2 diopter lens (i.e., 50 cm focal length)
sharpens the solar image nicely, and still works fine at 25-30 degrees off
axis, as it would be at the solstices. That size would allow me to plot the
curve on 11x17" paper in one piece, making for easy transfer to the
equatorial surface...
Still undecided about whether I should design it for civil noon or local
solar time. :{)
Dave Bell
N37.3 W121.97
Sent from my iPad
On Aug 19, 2013, at 6:37 AM, "sun.di...@libero.it" <sun.di...@libero.it>
wrote:
Dear friends,
I am glad to inform you that number 2 of the Orologi Solari magazine can now
be downloaded from http://www.orologisolari.eu.
Here is the list of the articles:
"The meridian line of Augustus" by Paolo Albéri Auber
"The declining 'Doble Catenaria' sundial" by Riccardo Anselmi
"Give me back the sundial" by Luigi Caccia
"A sundial in the Vedana Certosa" by Giuseppe De Donà
"The Latin and islamic astrolabe" by Leonardo Di Emanuele
"Effect of refraction and dip of the horizon on sundials" by Gianni Ferrari
"The Prof. Schilt test (1910 - 1999)" by Alessandro Gunella
"Quirico Filopanti 1812 - 1894" by Giovanni Paltrinieri
All the articles are in Italian but a short sunnary in English is available.
A "bonus" file can also be downloaded.
Unfortunately we are experiencing some problems with the browser cache: if
you have any problems when displaying the site pages please reload the page
(F5 in Internet Explorer) in order to get the up-to-date page display.
Greetings.
Gian Casalegno
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