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The relationship between canopy reflectance and leaf reflectance measured concurrently at the red edge over sugar beet canopies was used to simulate canopy reflectance from leaf reflectance spectra measured over the whole spectral domain. The results show that the spectral analogies found allow accurate reconstruction of canopy reflectance spectra. Explicit assumptions about the very low spectral variation of leaf intrinsic scattering properties are indirectly justified. The sensitivity of canopy reflectance to leaf optical properties was then investigated from concurrent spectral variations of canopy and leaf reflectance. Simulations using the SAIL and PROSPECT models demonstrated that the sensitivity of canopy reflectance to leaf reflectance was significant for large vegetation cover fractions in spectral domains where absorption was low.

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Authors: BARET F, INRA Bioclimatologie, Montfavet (FR);VANDERBILT V C, NASA Ames Research Center, California (US);STEVEN M D, Nottingham University (GB);JACQUEMOUD S, JRC Ispra (IT)
Bibliographic Reference: Article: Remote Sensing of Environment, Vol. 48 (1994) pp. 253-260
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