Physics – Optics
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apopt..21.1430b&link_type=abstract
Applied Optics, vol. 21, Apr. 15, 1982, p. 1430-1436.
Physics
Optics
22
Atmospheric Attenuation, Atmospheric Effects, Earth Environment, Photoabsorption, Radiation Measurement, Solar Spectra, Absorption Spectra, Air Masses, Cloud Cover, Turbidity, Water Vapor
Scientific paper
The effects of receiver field of view, air mass, clouds, turbidity and water vapor on absolute solar spectra are demonstrated through simultaneous recording of cloud conditions and atmospheric turbidity. The data presented indicate that diffuse light dominates the solar spectrum in the UV region, and that there is almost complete attenuation in the UV region at large air mass values together with a diminishing effect with increasing wavelength. Broken clouds are shown to add a significant amount of radiation due to reflections from cloud edges, with complete cloud cover transmitting a significant amount of UV radiation. Turbidity is found to have the greatest effect in the 500-nm wavelength vicinity, with no effect beyond 900 nm. Although water vapor does not have a large effect on the broadband spectrum, when compared with other atmospheric parameters, it has a significant effect within narrowband regions of maximum water vapor absorption. Spectral data are presented on expanded wavelength scales and resolutions sufficiently high for the determination of optical instrument wavelength bandpass optimal placement.
Bird R. E.
Eldering H. G.
Hulstrom Roland L.
Kliman A. W.
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