May I suggest you to have a look at Orologi Solari ? It includes two different tools for wall declination measurement.
It could maybe help you. Greetings. Gian http://digilander.libero.it/orologi.solari ----Messaggio originale---- Da: ka...@karonadams.com Data: 01/08/2011 17.36 A: "Bill Gottesman"<billgottes...@comcast.net>, <sundial@uni-koeln.de> Ogg: RE: Azimuth calculation/Wall declination @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4;} @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} @font-face {font-family:Tahoma; panose-1:2 11 6 4 3 5 4 4 2 4;} @font-face {font-family:Consolas; panose-1:2 11 6 9 2 2 4 3 2 4;} @font-face {font-family:Garamond; panose-1:2 2 4 4 3 3 1 1 8 3;} p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0in; margin-bottom:.0001pt; font-size:12.0pt; font-family:"Times New Roman","serif"; color:black;} a:link, span.MsoHyperlink {mso-style-priority:99; color:blue; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {mso-style-priority:99; color:purple; text-decoration:underline;} pre {mso-style-priority:99; mso-style-link:"HTML Preformatted Char"; margin:0in; margin-bottom:.0001pt; font-size:10.0pt; font-family:"Courier New"; color:black;} span.HTMLPreformattedChar {mso-style-name:"HTML Preformatted Char"; mso-style-priority:99; mso-style-link:"HTML Preformatted"; font-family:Consolas; color:black;} span.EmailStyle19 {mso-style-type:personal-reply; font-family:"Garamond","serif"; color:#1F497D; font-weight:bold;} .MsoChpDefault {mso-style-type:export-only; font-size:10.0pt;} @page WordSection1 {size:8.5in 11.0in; margin:1.0in 1.0in 1.0in 1.0in;} div.WordSection1 {page:WordSection1;} ->@font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4;} @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} @font-face {font-family:Tahoma; panose-1:2 11 6 4 3 5 4 4 2 4;} @font-face {font-family:Consolas; panose-1:2 11 6 9 2 2 4 3 2 4;} @font-face {font-family:Garamond; panose-1:2 2 4 4 3 3 1 1 8 3;} p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0in; margin-bottom:.0001pt; font-size:12.0pt; font-family:"Times New Roman","serif"; color:black;} a:link, span.MsoHyperlink {mso-style-priority:99; color:blue; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {mso-style-priority:99; color:purple; text-decoration:underline;} pre {mso-style-priority:99; mso-style-link:"HTML Preformatted Char"; margin:0in; margin-bottom:.0001pt; font-size:10.0pt; font-family:"Courier New"; color:black;} span.HTMLPreformattedChar {mso-style-name:"HTML Preformatted Char"; mso-style-priority:99; mso-style-link:"HTML Preformatted"; font-family:Consolas; color:black;} span.EmailStyle19 {mso-style-type:personal-reply; font-family:"Garamond","serif"; color:#1F497D; font-weight:bold;} .MsoChpDefault {mso-style-type:export-only; font-size:10.0pt;} @page WordSection1 {size:8.5in 11.0in; margin:1.0in 1.0in 1.0in 1.0in;} div.WordSection1 {page:WordSection1;} -> --> THIS is the kind of thing I have been looking for! The kinds of techniques that make the complex math work simply. Cathedrals were built a thousand years ago by people who had little more literacy than needed to do their jobs. None of them knew what a sine or cosine or tangent was. They knew how ratios worked and they knew the practicalities of geometry. Thanks for the great tool. As it happens, I need to measure the declination of a wall and this helps a lot! Karon Adams Accredited Jewelry Professional (GIA) You can send a free Rosary to a soldier! www.facebook.com/MilitaryRosary www.YellowRibbonRosaries.com From: sundial-boun...@uni-koeln.de [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Bill Gottesman Sent: Monday, August 01, 2011 10:55 AM To: sundial@uni-koeln.de Subject: Re: Azimuth calculation/Wall declination About 10 years ago I worked out a simple method to measure wall declination using just a carpenter's square and an accurate watch. The methods is described here http://www.precisionsundials.com/wall%20declination.pdf, and a simple windows program that does all the calculations for you is here http://www.precisionsundials.com/walldeclination.exe. When I tested it out many years ago, I believe it gave results repeatable at different times and on different days to a few tenths of a degree. -Bill On 7/31/2011 9:57 AM, Andrew Theokas wrote: Fellow dialists: I am using the following well known formula to calculate the sun’s azimuth for a particular time and location: Azimuth= tan-1 (sin H/(sin φ*cos H – cos φ*tanδ) where H= Sun’s hour angle φ= the latitude - 42.3 degrees δ is the sun’s declination - 18.62 degrees The location is in Boston, USA or 42.3 degrees N and 71.04 degrees west I am using the azimuth-azimuth approach to find the declination of a wall found here: http://www.mysundial.ca/tsp/wall_declination.html the time the measurement was made was 11:18 am (daylight savings time is in effect) I can easily calculate that the azimuth with respect to the wall is 26.8 degrees. Here is the problem: using two other independent methods I find that the wall’s declination is 20 degrees East. So 26.8 degrees – Sun’s Azimuth should equal about twenty degrees. But, using the above equation I cannot get an Azimuth value to work. One place where I might be in error is the value of the Hour angle which I compute to be about –16 degrees. But you can also find the Hour Angle on line here at http://pveducation.org/pvcdrom/properties-of-sunlight/sun-position-calculator Where might I be going wrong? Many thanks for a reply! Andrew Theokas ---------------------------------------------------https://lists.uni-koeln.de/mailman/listinfo/sundial
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