Far Infrared radiation is measured by two pyrgeometers, one for measuring the Far Infrared
radiation from the sky, the other from the soil surface. The model type indication of the pyrgeometer
is CG 3. The CNR 1 can be used in two ways: measuring the four components separately, the four
Separate Components Mode (4SCM) or measuring only Net Radiation, the Net Radiation Mode
(NRM).