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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 (when you set your timer chip) as if there was no DST at all. On the other hand, sunearthtools does use DST.)
+
you have to determine UT (when you set your timer chip) as if there was no DST at all. On the other hand, sunearthtools allow using DST,
 +
and this option is selected by default.
    
==SPA Algorithm==
 
==SPA Algorithm==

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