Special to Rolf Menzl I wrote a little EXCEL4.0 program which draws plain sundials considering the equation of time. input parameters are: 1. longitude and latitude of the desired location 2. declination and inclination of the sundial 3. length of the perpendicular gnomon 4. dates and times of the point to be printed
If you use this program to draw a horizontal sundial, you will be able to determine the declination of a wall with an error of approx 1 degree. You can use such a dial at any time of the day (interesting for Peter Tandy?). The main problem from my point of view is the exact horizontal level of such a sundial! The program works fine for me, but to use it you will need a few experience with exel. Nevertheless, anybody who has interest shall give me a note, so I can try to mail or send it to him (I have still some sort of problems with my email configuration). For the next four weeks I'm on vacation, so I'll back in June! TGIF Dieter Fedra
