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Resource

SunAngle Calculator

Solar angles based on location, date, and time

Calculates solar angles based on location, date, and time. It's useful in passive solar building design, PV and solar thermal system design and analysis, and other applications such as photography. Output includes declination, equation of time, local solar time, hour angle, solar altitude, solar azimuth, time of sunrise and sunset. This tool -- the development and maintenance of SunAngle -- is supported 100% by voluntary user donations and is provided by Sustainable By Design for a small fee.