Absolute spectral measurements of direct solar ultraviolet irradiance with a Brewer spectrophotometer

Details Absolute spectral measurements of direct solar ultraviolet irradiance with a Brewer spectrophotometer Absolute spectral measurements of direct solar ultraviolet irradiance with a Brewer spectrophotometer

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apopt..36.5199b&link_type=abstract

Applied Optics LP, vol. 36, Issue 21, pp.5199-5204

Physics

Optics

34

Scientific paper

A methodology for the absolute calibration of spectral measurements of direct solar ultraviolet radiation, performed with a Brewer spectrophotometer is presented. The method uses absolute measurements of global and diffuse solar irradiance obtained practically simultaneously at each wavelength with the direct-Sun component. On the basis of this calibration, direct-Sun spectra, measured over a wide range of solar zenith angles at a high altitude site, were used to determine the extraterrestrial solar spectrum by applying the Langley extrapolation method. Finally this spectrum is compared with a solar spectrum derived from the airborne tunable laser absorption spectrometer 3 Space Shuttle mission, showing an agreement of better than 3 .

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