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[http://www.sunearthtools.com/dp/tools/pos_sun.php solar position calculator] from
 
[http://www.sunearthtools.com/dp/tools/pos_sun.php solar position calculator] from
 
sunearthtools. (Attention: SolarTracker4Arduino does NOT account for daylight saving time (DST),
 
sunearthtools. (Attention: SolarTracker4Arduino does NOT account for daylight saving time (DST),
you have to determine UT as if there was no DST at all.)
+
you have to determine UT (when you set your timer chip) as if there was no DST at all. On the other hand, sunearthtools does use DST.)
    
==SPA Algorithm==
 
==SPA Algorithm==

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