Dear Dialists I have augmented the information posted a few days ago regarding the calculation of the analemma. There is now also a program that computes the analemma for every hour and projects the analemmas onto a user defined plane surface of arbitrary orientation, ie. horizonal, vertical, equatorial, vertical facing 10 degrees west of south, etc..
I believe that there have been some postings in the recent past asking for details on the calculation of the analemma for a dial designed for a vertical wall facing in some direction. This program handles that need. On this page are gif files showing the projections for various configurations of interest. http://www.wengersundial.com/Analemma/analemmaDetails.html Dan Wenger PS Fixed some notational problems in the original program. Program has not changed. Daniel Lee Wenger Santa Cruz, CA [EMAIL PROTECTED] http://wengersundial.com http://wengersundial.com/wengerfamily
