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A methodology to obtain the atmospheric optical thickness from global and diffuse sky irradiance measurements performed by a radiometer with a 2pi solid angle of view, is described. Optical thickness values obtained from field measurements carried out with a "2 pi radiometer" and by a sun-photometer are compared and discussed.

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Authors: MARACCI G, JRC Ispra (IT);ZIBORDI G, Institute for the Study of Geophysical and Environmental Methodologies, National Research Council, Modena (IT)
Bibliographic Reference: Article: International Journal of Remote Sensing, Vol. 11 (1990) No. 10, pp. 1957-1961
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