Re: refraction formula

2010-03-17 Thread Thomas Steiner
Thank you Brad! I only looked at the explaination, not at the formula itself. Sorry. Problem solved. Have a great day! Thomas 2010/3/16 Brad Lufkin bradley.luf...@gmail.com: the term a in your formula is the Sun's apparent altitude in degrees (see Chapter 16 of Meuus's Astronomical

Burnsville Quilt Block Sundial

2010-03-17 Thread Bob Hampton
It has been a long time since my last update to you on the progress of the Burnsville Quilt Block sundial. We've had a very rough winter here in the Blue Ridge mountains, and it slowed our progress, but it's all coming together now! As many of you will recall, this is a large (8ft. x