[aprssig] Dumb tracker question

scott at opentrac.org scott at opentrac.org
Sat Sep 30 15:35:05 CDT 2006

> Please explain that statement Scott,  "For APRS purposes, it doesn't 
> need to be accurate to more than a degree"! A degree in any purpose 
> seems to be far out!! :-)  What were you suggesting?

The heading calculation doesn't need to be more accurate than 1 degree,
because it's only reported to the nearest degree anyway.  The standard ANSI
C trig functions work with double-precision floating point numbers (in
radians), which is way more precision than I need.


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