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    Re: Working Analemma
    From: James R. Van Zandt
    Date: 2006 Nov 11, 22:30 -0500

    
    
    Lu Abel  wrote:
    
    >   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
    
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