Hi John, I thought about a procedure in zw2000 to calculate the beads of the EoT curve but the procedure is rather difficult to build in my program. The procedure itself isn't difficult, but to get it correct in my program needs a lot of programming time. I need a different system for counting daynumbers and by that the basic of my program no longer can't be used directly. I have to do a lot of new programming.
However, Bill Gottesman gives a possible solution to do what you want. It is some work to do in a CAD program but the procedure is present. And you may choose any day sequence you want. The choice 1,5,10... or 1,6 11... This is a matter of our way of counting the days. If we started with number 0 for the first day the counting should be 0, 5, 10, 15 ... But we start with 1 and then the counting 1, 5, 10, 15... has different increments, 4 as first step and 5 for all other steps. Then it is better to use 1, 6, 11, 16... to have a more regular scale. (We are almost back to the discussion "when starts the 21st century?) That's also the reason that in my program I have a predefined choice for day/month lines for 1,16 / month. Best wishes, Fer. Fer J. de Vries [EMAIL PROTECTED] http://www.iae.nl/users/ferdv/ Eindhoven, Netherlands lat. 51:30 N long. 5:30 E ----- Original Message ----- From: John Carmichael <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, October 03, 2000 5:03 PM Subject: beaded analemma date sequence > Hello All: > > Ron Anthony and I have been having a discussion concerning the proper date > sequence of a "beaded" analemma (an analemma which has dates marked on it). > > We noticed that the Shadows sundial generator program has analemmas with the > following dates of each month: 1,6,11,16,21,26. Why would this sequence be > better than: 1,5,10,15,20,25? Certainly the average sundial user would find > it easier to read 1,5,10 etc. > > John Carmichael > Tucson Arizona > >
