Although astrolabes are not sundials in the strictest sense, many sundial enthusiasts are also interested in astrolabes. I just wanted to let anyone who is interested know that I have just made a fully animated planetarium program in the form of a planispheric astrolabe available for free download from my astrolabe web site. It gives very accurate positions of the Sun and the equation of time and can be quite useful for sundial design and testing. The program is called The Electric Astrolabe and requires an Intel processor of 386 or later vintage with a math coprocessor. Instructions for downloading and installation are on the web site below.
Best regards, Jim James E. Morrison Astrolabe web pages at: http://myhouse.com/mc/planet/astrodir/astrolab.htm
