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Ballard Library Green Roof Part 1 Video


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Solaris Positive Energy (French) Video


  

 

 

 

Resource

Solar Position Calculator

Solar zenith angle, declination, equation of time, etc.

This calculator program returns solar zenith angle, declination, Julian day, equation of time, hour angle, instantaneous and daily extraterrestrial radiation values, and sunrise and sunset times. Equations were provided by the National Renewable Energy Laboratory.