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Reflectance of natural surfaces can be derived from satellite data. However, values which are independent of the atmospheric turbidity and of the surface altitude, can only be obtained if the atmospheric effects are removed. An atmospheric correction model, capable of accounting for the surface and sensor altitudes above sea level, is described and validated through data remotely sensed over Antarctica through the Barnes Modular Multispectral Radiometer characterised by spectral bands overlapping those of the Landsat Thematic Mapper. The model is applied in a sensitivity study to evaluate the error induced in reflectance retrieved from remotely sensed data, by indeterminacy in atmospheric optical thicknesses. Results show that the indeterminacy in the water vapour optical thickness is the main source of inaccuracy in reflectances retrieved from data remotely sensed over Antarctica.

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Authors: ZIBORDI G, IMGA/CNR, Modena (IT);MARACCI G, JRC Ispra (IT)
Bibliographic Reference: Paper presented: V Convegno Nazionale AIT, Milano (IT), May 26-28, 1992
Availability: Available from (1) as Paper IT 36815 ORA