radiometer normally used to measure global irradiance on a horizontal plane
Note 1 to entry: A pyranometer can also be used to measure diffuse irradiance when used with a shade ring or disc.
Note 2 to entry: A pyranometer can also be used to measure total irradiance on an inclined plane, which would include radiation reflected from the foreground.
[SOURCE: IEC TS 61836:2007, 3.5.7 b)] |