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  5. Normative aspects of albedo measurement

Article | REF: R2935 V1

Albedo measurement

Author: Jean-Pierre MONCHAU

Publication date: January 10, 2024 | Lire en français

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    4. Normative aspects of albedo measurement

    There are few French, European or international standards for albedo measurement.

    4.1 ASTM E903 and NF EN 4593: spectral measurements

    These two methods are similar. An integrating sphere with an inner diameter greater than 150 mm must be used. Spectral hemispherical directional reflectance is measured. Once this data has been collected, the reflected energy fraction is calculated for each wavelength of the solar spectrum, weighted by the spectral solar flux:

    a=∫λ1λ2ρ(λ)⋅E(λ)⋅dλ
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