نتایج جستجو برای: top of atmosphere
تعداد نتایج: 21174655 فیلتر نتایج به سال:
The radiative transfer equation in a planar-stratified atmosphere with multiple scattering is solved by numerically integrating an ensemble of trial functions which are constructed so as to satisfy the boundary conditions (downward-propagating radiances) at the top of the atmosphere. The boundary conditions at the surface (reflection or scattering) are imposed after integration through the atmo...
Vegetative surfaces are non-lambertian and deriving their spectral properties from space-borne sensors becomes complicated when off-nadir view angles are taken into consideration. In order to utilize off-nadir observations a complete understanding of directional reflectance is needed. This requires understanding of propagation of solar radiation as radiative transfer (RT) problem through a coup...
This paper discusses the accuracy of the operational Medium Resolution Imaging Spectrometer (MERIS) Level 2 land product which corresponds to the Fraction of Absorbed Photosynthetically Active Radiation (FAPAR). The FAPAR value is estimated from daily MERIS spectral measurements acquired at the top-of-atmosphere, using a physically based approach. The products are operationally available at the...
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