[Antennas] Using GeoClock To Find True North

George, W5YR [email protected]
Mon, 18 Feb 2002 19:45:52 -0600


Jim, what is your reference for the azimuth measurement that increases from
sunrise to noon and then decreases from noon to sunset? Elevation I can
understand - but azimuth?  <:}

72/73/oo, George W5YR - the Yellow Rose of Texas         
Fairview, TX 30 mi NE of Dallas in Collin county EM13qe   
Amateur Radio W5YR, in the 56th year and it just keeps getting better!
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Jim Clark wrote:
> 
> As the azimuth and elevation of the sun increase from sunrise to noon
> and decrease from noon to sunset a plot of the shadow will describe a
> straight segment from west to east of which the perpendicular bisector
> will be north/south. Try it!
> To do what you describe the sun would have to be at the same elevation
> all day and then you would be at the North Pole in summer or South Pole
> in winter.
> 
> Jim, N5QL