Solar irradiance is a measure of the irradiance (power per unit area on the Earth`s surface) produced by the Sun in the form of electromagnetic radiation, which is perceived by humans as sunlight. Solar irradiance in a specific area may be measured as insolation, the solar radiation energy per unit area during a given time, or as direct insolatio....
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http://en.wikipedia.org/wiki/Solar_irradiance
Radiant energy given by the sun over all wavelengths that falls each moment on one square meter of earths atmosphere.
Found on
http://planetfacts.org/space-terms/
See irradiance.
Found on
http://www.encyclo.co.uk/local/21690
No exact match found.
