Physics
Scientific paper
Jan 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995angeo..13..108d&link_type=abstract
Annales Geophysicae (ISSN 0992-7689), vol. 13, no. 1, p. 108-110
Physics
4
Cloud Cover, Polarization (Waves), Reflectance, Solar Radiation, Stratocumulus Clouds, Validity, Algorithms, Anisotropy, Radiative Transfer
Scientific paper
The POLDER (POLarization and Directionality of the Earth's Reflectance) instrument provides multidirectional radiance measurements in the visible and near-infrared range and thus allows to measure the anisotropy of the reflected solar radiation. As a resilt POLDER allows to investigate the validity of the usual plane-parallel approximation for cloud reflectances. The airborne instrument was flown over stratocumulus clouds in the Azores region during June 1992. The bidirectional reflectances of overcast scenes have been analyzed. These scenes are not similar to homogeneous plane-parallel layers but their bidirectional reflectances compare favorably with those of heterogeneous plane-parallel layers within 2 - 3%.
Buriez Jean-Claude
Descloitres J.
Parol Frederic
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