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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 1, Iss. 7 — Jul. 17, 2006

Narrowband filter radiometer for ground-based measurements of global ultraviolet solar irradiance and total ozone

Boyan Petkov, Vito Vitale, Claudio Tomasi, Ubaldo Bonafé, Salvatore Scaglione, Daniele Flori, Riccardo Santaguida, Michael Gausa, Georg Hansen, and Tiziano Colombo  »View Author Affiliations

Applied Optics, Vol. 45, Issue 18, pp. 4383-4395 (2006)

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The ultraviolet narrowband filter radiometer (UV-RAD) designed by the authors to take ground-based measurements of UV solar irradiance, total ozone, and biological dose rate is described, together with the main characteristics of the seven blocked filters mounted on it, all of which have full widths at half maxima that range 0.67 to 0.98   nm . We have analyzed the causes of cosine response and calibration errors carefully to define the corresponding correction terms, paying particular attention to those that are due to the spectral displacements of the filter transmittance peaks from the integer wavelength values. The influence of the ozone profile on the retrieved ozone at large solar zenith angles has also been examined by means of field measurements. The opportunity of carrying out nearly monochromatic irradiance measurements offered by the UV-RAD allowed us to improve the procedure usually followed to reconstruct the solar spectrum at the surface by fitting the computed results, using radiative transfer models with field measurements of irradiance. Two long-term comparison campaigns took place, showing that a mean discrepancy of + 0.3 % exists between the UV-RAD total ozone values and those given by the Brewer #63 spectroradiometer and that mean differences of + 0 .3% and - 0.9 % exist between the erythemal dose rates determined with the UV-RAD and those obtained with the Brewer #63 and the Brewer #104 spectroradiometers, respectively.

© 2006 Optical Society of America

OCIS Codes
(010.1290) Atmospheric and oceanic optics : Atmospheric optics
(010.4950) Atmospheric and oceanic optics : Ozone
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: October 28, 2005
Manuscript Accepted: January 11, 2006

Virtual Issues
Vol. 1, Iss. 7 Virtual Journal for Biomedical Optics

Boyan Petkov, Vito Vitale, Claudio Tomasi, Ubaldo Bonafé, Salvatore Scaglione, Daniele Flori, Riccardo Santaguida, Michael Gausa, Georg Hansen, and Tiziano Colombo, "Narrowband filter radiometer for ground-based measurements of global ultraviolet solar irradiance and total ozone," Appl. Opt. 45, 4383-4395 (2006)

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