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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 25 — Sep. 1, 2005
  • pp: 5321–5331

Traveling reference spectroradiometer for routine quality assurance of spectral solar ultraviolet irradiance measurements

Julian Gröbner, Josef Schreder, Stelios Kazadzis, Alkiviadis F. Bais, Mario Blumthaler, Peter Görts, Rick Tax, Tapani Koskela, Gunther Seckmeyer, Ann R. Webb, and Diana Rembges  »View Author Affiliations


Applied Optics, Vol. 44, Issue 25, pp. 5321-5331 (2005)
http://dx.doi.org/10.1364/AO.44.005321


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Abstract

A transportable reference spectroradiometer for measuring spectral solar ultraviolet irradiance has been developed and validated. The expanded uncertainty of solar irradiance measurements with this reference spectroradiometer, based on the described methodology, is 8.8% to 4.6%, depending on the wavelength and the solar zenith angle. The accuracy of the spectroradiometer was validated by repeated site visits to two European UV monitoring sites as well as by regular comparisons with the reference spectroradiometer of the European Reference Centre for UV radiation measurements in Ispra, Italy. The spectral solar irradiance measurements of the Quality Assurance of Spectral Ultraviolet Measurements in Europe through the Development of a Transportable Unit (QASUME) spectroradiometer and these three spectroradiometers have agreed to better than 6% during the ten intercomparison campaigns held from 2002 to 2004. If the differences in irradiance scales of as much as 2% are taken into account, the agreement is of the order of 4% over the wavelength range of 300–400 nm.

© 2005 Optical Society of America

OCIS Codes
(120.3940) Instrumentation, measurement, and metrology : Metrology
(120.4140) Instrumentation, measurement, and metrology : Monochromators
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(120.5630) Instrumentation, measurement, and metrology : Radiometry
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(260.7190) Physical optics : Ultraviolet

History
Original Manuscript: January 10, 2005
Revised Manuscript: March 18, 2005
Manuscript Accepted: March 18, 2005
Published: September 1, 2005

Citation
Julian Gröbner, Josef Schreder, Stelios Kazadzis, Alkiviadis F. Bais, Mario Blumthaler, Peter Görts, Rick Tax, Tapani Koskela, Gunther Seckmeyer, Ann R. Webb, and Diana Rembges, "Traveling reference spectroradiometer for routine quality assurance of spectral solar ultraviolet irradiance measurements," Appl. Opt. 44, 5321-5331 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-25-5321

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