NDLI: Problems met in the elaboration of sky radiation measurements

Content Provider	IEEE Xplore Digital Library
Author	Tonna, G. Boi, P. Dalu, G. Nakajima, T. Pompei, A. Rao, R. Olivieri, B.
Copyright Year	1995
Description	Author affiliation: Inst. for Atmos. Phys., CNR, Rome, Italy (Tonna, G.; Boi, P.)
Abstract	Measurements of sky radiation concern direct solar flux F and diffuse sky flux E; they are used for deriving optical and physical features of the atmospheric aerosols. Sky radiation is measured by the sky-radiometer (a photometer with interferential filters annexed for the selection of the wavelengths at which to operate) and a pointing system. The wavelengths are usually selected within the main atmospheric windows, in order to reduce the radiative transfer problem to a pure scattering problem; the sky radiometer used in the authors' research program operates at 0.369, 0.500, 0.675, 0.776, 0.862 and 1.048 /spl mu/m. Measurements are usually carried out pointing along a conical surface with the same zenith angle of the Sun, or along a plane with the same azimuthal angle. The two quantities considered in their scheme of data elaboration are the direct solar flux F and the ratio R between the diffuse and the direct flux. The authors propose a procedure of calibration based on experimental data concerning both direct and diffuse radiation. A retrieval of only R data is performed for all the available measurements.
Starting Page	1853
Ending Page	1854
File Size	253544
Page Count	2
File Format	PDF
ISBN	0780325672
DOI	10.1109/IGARSS.1995.524047
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-07-10
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Atmospheric measurements Wavelength measurement Optical filters Optical scattering Atmospheric waves Optical variables control Aerosols Photometry Radiometry Optical surface waves
Content Type	Text
Resource Type	Article

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