NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Working Analemma
From: James R. Van Zandt
Date: 2006 Nov 11, 22:30 -0500
From: James R. Van Zandt
Date: 2006 Nov 11, 22:30 -0500
Lu Abelwrote: > The UPS "analemma" is a stainless steel path about 2 inches wide, > inscribed at about 10 day intervals. It was constructed based on a > set of plans provided by a professor who had to very carefully > calculate the distortions induced by the location of the mirror. > Although it hasn't been in service for a full year, I hear it's > doing fine so far.... I assume that it works at solar noon each day. I wouldn't be surprised if they need to post a conversion table between solar time and what the clocks are set to. Which reminds me - do you remember the analemma that Tom Hanks' character drew in the cave in Castaway? He used it as a calendar. Except that he could only have created or used it if he had accurate time. - Jim Van Zandt --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---