My Smiling Red Face
John, I am happy (though embarrassed) to report that I am now convinced that most of the edge problems I saw in the proposal photos were apparently artifacts. Theyseem to have been introduced into thePDFimages by the compression/decompression processes. Perhaps some spatial periodicity aliasing was at work.There are suspiciously moire-like patterns in panel areas, as well as less regular changes somehow introduced at the apparent edges. However, this doesn't alter the bases for the calculation of time-error vs edge-error that I posted on June 25th. Photos did not enter into that: ... Thus at that distance, the time required for the 1/2° degree wide sun to pass through the meridian plane would be very nearly 2 minutes of time during which it would move about 9.3 inches relative to the style edge. Therefore, if the style's edge were to be laterally displaced 3 inches, the resulting error in time would be about 3/9.3 x 120 = 38.7 seconds of time, and a 1 inch wrong location of the effective edge would cause nearly 13 seconds of error. ... . which spoke to your comment: . By placing one eye at the base of a style, we could look straight up the edge of the styles. We did see very slight undulations in the styles, but we guesstimated that they were only between I and 3 inches, a very small amount if you consider the enormous size of the sundial. These could only affect the precision of the dial by a few seconds. Time will tell! Indeed, time has already told me some things. Continued best wishesfor your endeavors, Bill
High Noon
Now and then I run across the phrase High Noon. Can someone please tell me what that means? I didn't find it in John Davis' excellent glossary. Best wishes, Mac Oglesby -
Re: High Noon
Mac I thought we killed this cat already! It's the time of the sun's transit when it souths and is at its highest altitude during the day. John John L. Carmichael Jr. Sundial Sculptures 925 E. Foothills Dr. Tucson Arizona 85718 USA Tel: 520-696-1709 Email: [EMAIL PROTECTED] Website: http://www.sundialsculptures.com - Original Message - From: Mac Oglesby [EMAIL PROTECTED] To: sundial@rrz.uni-koeln.de Sent: Wednesday, June 26, 2002 12:22 PM Subject: High Noon Now and then I run across the phrase High Noon. Can someone please tell me what that means? I didn't find it in John Davis' excellent glossary. Best wishes, Mac Oglesby - -
Re: High Noon
Mac Oglesby wrote: Now and then I run across the phrase High Noon. Can someone please tell me what that means? I didn't find it in John Davis' excellent glossary. Hi Mac, I believe that term means the time of local meridian passage, when the sun is at it's highest? Jim Tallman -
Re: High Noon
Mac Oglesby wrote: Now and then I run across the phrase High Noon. Can someone please tell me what that means? I didn't find it in John Davis' excellent glossary. I can find no straightforward response. But try these. Writers say: http://www.writersblock.ca/spring99/a-origin.htm High noon has long been associated with a crisis or confrontation. The classic western film of that name is not the origin, however. The term has been used this way in English literature since the 14th century. I have found online references to high noon referring specifically to Midsummer's Day or St John's Day (24th June) when the sun is apparently at the highest point for some days. (Druids, Masons). The dictionary also says high has come to mean important as in high priest. Noon itself derives originally from nine or the ninth hour after sunrise (probaby 3pm :-) and not when it is apparently highest in the sky. Well... you asked, Mac! Maria Brandl Mallacoota 37° 32' 60S 149° 45' 0E -
