| Term: | Irradiance |
| Definition: |
Irradiance - A radiometric term for the powerof electromagnetic radiation at a surface, per unit area. "Irradiance" isused when the electromagnetic radiation is incident on the surface.Irradiance data may be reported in any units (i.e. counts/s) due to, forexample, being at a particular wavelength, or to being anot-fully-calibrated relative measurement. |