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RE: Compass corrections

 Just to add a few things to the discussion.   Although I use a program I 
found at NOAA to determine magnetic deviation (I have a copy of the program 
at http://www.megalink.net/~wejones/pcgeom31.exe  ) , the most accurate 
method is the method previously mentioned method of finding the time of local 
noon,( either from astronomy or tracking programs, or from 
http://riemann.usno.navy.mil/AA/data/docs/AltAz.html  )  and observing the 
shadows of a vertical pole at this time. There is also a somewhat less 
accurate method using a common ham program.  The program is the great circle 
program that you can find in a couple ARRL publications.  Just use it to find 
the heading to 76.2 deg N  , 101 deg W  ,  This will usually be within a 
couple degrees, which is good enough for anything but a dish.

*Bill Jones  N3JLQ  Sweden Maine     *
* wejones@megalink.net               *
* http://www.megalink.net/~wejones   *
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