Recently I wrote: > >Off and on for several months I've been trying to use the formulas from the >sundial section of Jean Meeus' book, "Astronomical Algorithms." I refer to >Chapter 56, "Calculation of a Planar Sundial" by R. Sagot and D. Savoie. >So far I haven't been able to get results which agree with data from >Zonwvlak, which I use as my reference. I'm certainly prepared to believe >the mistakes are mine, not errors by Sagot & Savoie, but I haven't been >able to see where. > >The particular application I have explored most is the calculation of >Italian hour lines for a vertical dial declining slightly west. But I've >not had success with other dial types or orientations. > >Does anyone on this list have experience with the Sagot & Savoie formulas? >My book copy is the first English edition, copyright 1991, with an errata >sheet dated December 1993. > >Thanks, > >Mac Oglesby
I want to report that Fer de Vries has sent a message which helped me find my error. There is no problem with the Sagot and Savoie formulae, as far as I know. Mac
