NavList:

Frank, on an otherwise dull Friday, this amazingly clean, creative and useless (all in one) solution to the radar dish sundial. It's a real picker upper. 

However, I had in mind processing the eliptical shadow cast by the radar dish and measuring the ratio of the major and minor axis as the seasons changed. The excentricity of the ellipse would indicate the hour angle.   Unlike traditional sundials were viewers are 'outside looking-in' at the shadow, the radar disk dial viewer would be withing the shadow itself. Of course, the ground behind the dish would be sutiably calibrated with aids such as the major/minor axis ratios, Equation of Time, longitude offset from the time zone's central meridian etc.

Simply great!

Ed