Hi:

I noticed that you're making use of my page "Focus-Balanced Paraboloidal Reflector". That's good. I'm glad that somebody is finding it useful.

You might also be interested in this:

http://www.appropedia.org/Sun_related_calculations

Let me know if you have any questions.

DOwenWilliams 15:15, March 14, 2012 (UTC)