[Antennas] Using GeoClock To Find True North

Tue, 19 Feb 2002 00:33:17 -0000

Try it, you might be surprised.  Remember, at the shadow moves, it also
gets shorter as the sun gets higher.  This partially corrects for the odd
angle you talk of.  In any case, it is not accurate enough to calibrate your
antennae with.  In fact, at noon on the equator, with the sun right
overhead,
the shadow will be non-existent for a moment.  Now, this might not work at
the poles.  But that is easy.  If you can just remember which pole you are
at, then no matter which way you look, you are looking toward the other
one.

Mike.

> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of Don Havlicek
> Sent: Monday, February 18, 2002 11:41 PM
> To: Jim Clark; [email protected]
> Subject: Re: [Antennas] Using GeoClock To Find True North
>
>
> As the sun rises, the tip of the shadow will move from near West to a
> point approaching North .. then, after Noon, it will approach East.
> Therefore, the segment from 0900 'tip' to 1000 'tip' will be somewhere
> along a SW/NE line.  Sooooo .. the permendicular bisector of that
> segment will be close to NW/SE !
> Don
> N8DE