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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 35, Iss. 30 — Oct. 20, 1996
  • pp: 6069–6075

Improvement of diffuse solar irradiance measurements with noncosine instruments

A. de La Casinière, T. Cabot, A. I. Bokoye, and J. L. Pinedo  »View Author Affiliations


Applied Optics, Vol. 35, Issue 30, pp. 6069-6075 (1996)
http://dx.doi.org/10.1364/AO.35.006069


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Abstract

As a result of sky radiance anisotropy, significant errors spoil diffuse solar irradiance data obtained by means of noncosine-true instruments, which happens in spite of knowledge of the relative cosine response. To reduce these errors we recommend a method that involves an additional measurement of diffuse irradiance from a horizon band. The efficiency of the so-called double-measurement method is found to be optimum for a 25° horizon band elevation. We confirm the feasibility of the method with relevance tests that use diffuse solar spectral measurements carried out on cloudless skies by means of an UV spectroradiometer.

© 1996 Optical Society of America

History
Original Manuscript: June 28, 1995
Revised Manuscript: February 16, 1996
Published: October 20, 1996

Citation
A. de La Casinière, T. Cabot, A. I. Bokoye, and J. L. Pinedo, "Improvement of diffuse solar irradiance measurements with noncosine instruments," Appl. Opt. 35, 6069-6075 (1996)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-35-30-6069

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