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The Net Radiometer, CNR 1, is intended for the analysis of the radiation balance of Solar and Far Infrared radiation. The most common application is the measurement of Net (total) Radiation at the earth's surface.
Three of CNR 1 features are unique: first, it measures four radiation components separately, secondly, it is robust and virtually maintenance free, and thirdly, calibration of CNR 1 is relatively straightforward. These factors make the CNR 1 extremely suitable for long-term outdoor measurements. Especially in rough environments.
Generally speaking, the CNR 1 will measure with a higher degree of accuracy than other competitive instruments.
This is mainly because the dominant measurement of solar radiation with the CM 3 is accurate. Accuracy is also influenced positively by the possibility of viewing the four separate components of the radiation. In this way errors in the measurement can be detected more easily. Also contributing to a high degree of accuracy, is the CNR 1's high reliability, and, under conditions where other instruments would be covered by dew or frost, its incorporated heating.
Solar radiation is measured by two pyranometers, one for measuring incoming radiation from the sky, and the other, which faces downward, for measuring the reflected Solar radiation. From these two pyranometers, albedo, the ratio of reflected and incoming radiation, can also be determined. The model type indication for the pyranometers is CM 3.
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 or measuring only Net Radiation, the Net Radiation Mode.
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