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Message: <blockquote data-quote="gambit" data-source="post: 859437" data-attributes="member: 304438"><p>Yes, I know. Calculating a diffraction pattern that includes spurious reflections is complex. That's why it is so surprising that the highly simplified model of a single, smooth, parabolic reflector seems to predict the shape of the 1st null from SW Spain all the way to NE Germany. Of course, maybe the prediction isn't really all that good. A proper test would need to check against more than just two points along the null contour and reliable reception reports would be needed for each of those "null" points.</p></blockquote><p></p>