Hello fellow dialists, how are you? I'm with a problem here which doesn't concern exactly to sundials, but since it deals with sun's position and his shadows, I couldn't think of anyone better than you to help me. I have a little garden here at home, a walled area where I grow some plants in pots. I've found that, depending on the place, teher's a difference greater than 2.5 hours in the sunlight a plant receives, and that affects greatly its development. I've measured the shadows cast before and after true noon during summer solstice (I live slightly south to the Tropic of Capricorn). I could repeat the process during equinox and winter solstice, but that's a boring task, and above all, if the weather is cloudy I'll miss the chance. So, can you tell me some trigonometrical method for calculating the shadows, using sun's altitude and azimuth? I couldn't devise one by myself. Thanks in advance, and Happy New Year!
Marcial --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
