NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Frank Reed
Date: 2013 Feb 10, 10:03 -0800
Lu, you wrote:
"Looks like some program generated the analemma, and even adjusted it for daylight time! Is this available to list members to try for our own locations??"
No software here, Lu. Just my quick and dirty computer drawing skills (plus one borrowed stock analemma image). If you look carefully, the Daylight Time portion is not quite in the right place, but close enough for my intentions. You can adjust this to your longitude by finding the difference in degrees, call it "diff", between your longitude and the central meridian of the time zone. If you're east of the central meridian, diff should be positive. Then slide the time scale to the left by (14.2-4*diff) minutes. Of course, if the quantity comes out negative, you would slide the scale to the right by that number of minutes. I didn't number the vertical scale, but the difference between lines is 10 degrees. You can label them easily enough for your latitude.
-FER
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