Instead of "to obtain a simple understanding of the mathematics behind how an analemmatic sundial works" I found on the mentioned website only information concerning the construction and the use of an analemmatic sundial.
In the Excel speadsheet the formula mentioned and used for "the longest shadow length at noon - WINTER" is wrong Shadow (l) = height * tan(LAT) must be Shadow (l) = height * tan(LAT + 23,5) Willy Leenders 50,9 N 5,4 E "Romano, Judith" wrote: > > There is a new fill-in form designed to provide a "free" resource in which > > to obtain a simple understanding of the mathematics behind how a > > GARDEN/HUMAN SUNDIAL works, while computing the calculations > > automatically. > > > > The EXCEL spreadsheet was designed for Northern Latitudes and Western > > Longitudes. It not only includes longitude correction, but also converts > > the information to the more common measurement of feet and inches. This > > easy and affordable outdoor project is perfect for getting children > > involved in both math and science! > > > > The "link" is available at John Hoy's website (You Can Make a Sundial!) in > > the "Full Size Analemmatic Dials" section -- > > http://www.grex.org/~jh/dial/index.html#ana. Please feel free to post > > this "link". Let me know if you have any questions. > > > > Judith Romano > > > >
