Kippzonen CMA 6 Albedometers Manual do Utilizador descarregar pdf (Página 35)

Instruction Manual - CMP/CMA series

Term Explanation

Albedo The portion of incoming radiation which is reﬂected by a surface

Azimuth angle Angle in horizontal direction (0 to 360°) normally referred to North

Cosine response Radiometer directional response according to the cosine of the zenith angle

Diuse horizontal irradiance Solar radiation, scattered by water vapour, dust and other particles as it passes through

the atmosphere, falling onto a horizontal plane surface (DHI)

Direct normal irradiance Radiation that has travelled in a straight path from the sun falling onto a plane surface

normal to the beam (DNI)

Global horizontal irradiance Total irradiance falling onto a horizontal plane surface (GHI)

Global = Diuse + (Direct x cos α); α is the solar zenith angle

Irradiance Radiant ﬂux density (W/m²)

Long-wave radiation Radiation with wavelengths from 4 m to more than 40 m

Pyranometer Radiometer for measuring short-wave global radiation

Pyrgeometer Radiometer for measuring long-wave radiation

Pyrheliometer Radiometer for measuring direct short-wave radiation

Short-wave radiation Radiation with wavelengths from approximately 300 nm to 4000 nm (4 m)

Thermopile Thermal detector made up of many thermocouple junctions

WMO World Meteorological Organisation, Geneva, Switzerland

WRC World Radiation Centre, Davos, Switzerland

WRR World Radiometric Reference (standard radiation scale) at WRC

WSG World Standard Group of radiometers at WRC

Zenith angle Angle from zenith (0° is vertical, 90° is horizontal)

9. Keyword index

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Kippzonen CMA 6 Albedometers Manual do Utilizador Página 35