I know that often one shouldn’t share an organization’s printed materials. Is it alright to send, to individuals, a copy of one of NASS’s PowerPoint files with the image of the Universal Analemmatic sun compass?
Taking the question a step farther, it it alright to post it at a forum discussion of methods for solar direction-finding? That’s an ingenious device, and I was surprised to find out that it was first introduced no later than 1660. The “N” at the noon direction puzzled me at first, until I realized that it was the direction of a shadow at noon, not the sun. That sun-compass is a particularly useful, convenient and versatile one, because it can be used even when it isn’t in the sunlight. If you’re in a car or train, and shadows of telephone poles are visible outside your window, then the device can give north, by showing the angle between north and a shadow’s direction. Thanks to NASS and to Fred Sawyer for those images of the Universal Analemmatic sun-compass. Michael Ossipoff 26N, 80W
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