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RESEARCH PRODUCT
A field method for measuring the thermal infrared emissivity
Vicente CasellesJosé A. Sobrinosubject
Materials scienceField (physics)business.industrychemistry.chemical_elementRadiationTemperature measurementAtomic and Molecular Physics and OpticsComputer Science ApplicationsOpticschemistryAluminiumRadiative transferRadianceEmissivityBlack-body radiationComputers in Earth SciencesbusinessEngineering (miscellaneous)description
Abstract In this work, a field method for measuring thermal infrared emissivities is proposed which is based on the box method, initially developed by Buettner and Kern (1965) for laboratory measurements. A theoretical analysis was made of the measurement carried out using the box and a correcting factor to Buettner and Kern's technique has been determined. Buettner and Kern's method has been modified to use radiative temperatures measured with a radiothermometer instead of radiance measurements. The walls of the box used and the cold lid was made of polished aluminium and the hot lid was made of black-painted anodized aluminium and it was heated in the field by solar radiation. With this method measurements of the thermal infrared emissivity of ground and vegetation can be obtained with a relative error not larger than 0.6%.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-06-01 | ISPRS Journal of Photogrammetry and Remote Sensing |