Regionally applicable angular reflectance models

Details Regionally applicable angular reflectance models Regionally applicable angular reflectance models

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982eras.nasa...45d&link_type=abstract

In NASA. Langley Research Center Earth Radiation Science Seminars p 45-52 (SEE N82-33320 23-93)

Statistics

Angles (Geometry), Earth Radiation Budget Experiment, Field Of View, Radiometers, Reflectance, Variations, Bidirectional Reflectance, Earth Radiation Budget, Inference, Mathematical Models, Mean, Normalizing (Statistics), Radiance, Radiant Flux Density

Scientific paper

Determination of the angular variation of the reflected radiance field in order to infer the reflected component of the Earth radiation budget from medium or narrow field of view radiometer measurements is discussed. An average angular model applicable at 250 to 1000 km is presented and evaluated. The nature of the convergence of the radiance patterns to the regional means is also discussed. Radiances measured during summer Monex 1979, from Hudson Bay to Saudi Arabia, were averaged and then normalized by multiplying by pi and dividing by the scene-averaged reflected flux density. This casts the model into the inverse of the bidirectional reflectance normalization coefficient, which has the value of unity for an isotropic surface. The reflected component of the Earth's radiation budget is inferred to an accuracy of about 2.5%.

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