Construction and evaluation of a miniature net radiometer

The miniature net radiometer was constructed by enclosing a blackened thermal transducer within four polystyrene radiation windows. The outer two radiation windows were hemispherically shaped (one-inch radius) so that the response to varying angles of incidence would follow the cosine law and precip...

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Bibliographic Details
Published inJournal of applied meteorology (1988) Vol. 2; no. 1; pp. 165 - 172
Main Author Fritschen, Leo J
Format Journal Article
LanguageEnglish
Published 1963
Subjects
ambient temperature
angle of incidence
canopy
equipment design
equipment performance
polystyrenes
radiometers
runoff
solar radiation
wind
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Summary:The miniature net radiometer was constructed by enclosing a blackened thermal transducer within four polystyrene radiation windows. The outer two radiation windows were hemispherically shaped (one-inch radius) so that the response to varying angles of incidence would follow the cosine law and precipitation runoff would be facilitated. The miniature net radiometer was calibrated in the laboratory in a chamber capable of simulating both solar and terrestrial radiation, and was found to be equally sensitive to both. The response to varying angles of incidence follows the cosine law. The output is not affected by wind or ambient temperature, and the size of the instrument enables its use to measure net radiation close to a surface or within a, plant canopy without appreciably altering the net radiation by shading.
Bibliography:http://handle.nal.usda.gov/10113/54764
ISSN:1520-0450
1520-0450