Services for Professionals in Solar Energy and Radiation

Astronomy - Sun Course

A problem of units ? of terminology ? Consult the Education service.

Applications for sun-earth astronomy, position of the sun in the sky, and extraterrestrial radiation. To launch a service, click on the appropriate button (rectangle) on right.

• Sun / Earth geometry and time references
• Radiation outside the atmosphere

Sun / Earth Geometry	Solar Declination, Distance Earth to Sun, Difference True and Mean Solar Time
	Daylength - Sunrise and Sunset
	Position of the Sun in the Sky (applet Java)

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Extraterrestrial and Top of Atmosphere Radiation	Extraterrestrial irradiance (E0), i.e. received by a plane normal to sun rays and outside the atmosphere
	Top of Atmosphere (ToA) radiation, i.e. received by a horizontal surface and outside the atmosphere

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