Active cavity radiometer is an electrically self-calibrating, cavity
pyrheliometer
A pyrheliometer is an instrument for measurement of direct beam solar irradiance. Sunlight enters the instrument through a window and is directed onto a thermopile which converts heat to an electrical signal that can be recorded. The signal v ...
used to measure
total and spectral solar irradiance.
See also
*
Radiometry
*
Radiation
References
Meteorological instrumentation and equipment
Radiometry
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