[amsat-bb] Re: Azimuth question

[Doug Faunt N6TQS +1-510-655-8604]

BTW, even Polaris isn't a perfect indicator of true north.  It's up to
2 degrees off for latitudes from the equator to 60 degrees north, and
you can read the nearby constellations to see when it's right on.
Consult Bowditch if you really care.

73,doug

   From: Bruce Bostwick <lihan161051 at sbcglobal.net>
   Date: Sat, 9 Jan 2010 13:52:01 -0600

   On Jan 9, 2010, at 1:47 PM, Dave Guimont wrote:

   > At 11:37 AM 1/9/2010, you wrote:
   >> Randy,
   >> True North is used as a reference. Magnetic North changes with  
   >> observer
   >> location and time.
   >>
   >
   > Art, what does mag north have to do with time??

   Magnetic deviation changes slowly over time as the earth's magnetic  
   field changes.  The rate and current deviation are usually pretty  
   precisely known for most areas.

   "No nation was ever so virtuous as each believes itself, and none was  
   ever so wicked as each believes the other." -- Bertrand Russell

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