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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 11 — Apr. 10, 2013
  • pp: 2226–2234

Method to intercalibrate sunphotometer constants using an integrating sphere as a light source in the laboratory

Zhengqiang Li, Philippe Goloub, Luc Blarel, Benyong Yang, Kaitao Li, Thierry Podvin, Donghui Li, Yisong Xie, Xingfeng Chen, Xingfa Gu, Xiaobing Zheng, Jianjun Li, and Maxime Catalfamo  »View Author Affiliations


Applied Optics, Vol. 52, Issue 11, pp. 2226-2234 (2013)
http://dx.doi.org/10.1364/AO.52.002226


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Abstract

A calibration method is introduced to transfer calibration constants from the reference to secondary sunphotometers using a laboratory integrating sphere as a light source, instead of the traditional transferring approach performed at specific calibration sites based on sunlight. The viewing solid angle and spectral response effects of the photometer are taken into account in the transfer, and thus the method can be applied to different types of sunphotometers widely used in the field of atmospheric observation. A laboratory experiment is performed to illustrate this approach for four types of CIMEL CE318 sunphotometers belonging to the aerosol robotic network (AERONET). The laboratory calibration method shows an average difference of 1.4% from the AERONET operational calibration results, while a detailed error analysis suggests that the uncertainty agrees with the estimation and could be further improved. Using this laboratory calibration approach is expected to avoid weather influences and decrease data interruption due to operationally required periodic calibration operations. It also provides a basis for establishing a network including different sunphotometers for worldwide aerosol measurements, based on a single standard calibration reference.

© 2013 Optical Society of America

OCIS Codes
(120.5240) Instrumentation, measurement, and metrology : Photometry
(280.1100) Remote sensing and sensors : Aerosol detection
(150.1488) Machine vision : Calibration

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: December 5, 2012
Revised Manuscript: February 24, 2013
Manuscript Accepted: March 5, 2013
Published: April 3, 2013

Citation
Zhengqiang Li, Philippe Goloub, Luc Blarel, Benyong Yang, Kaitao Li, Thierry Podvin, Donghui Li, Yisong Xie, Xingfeng Chen, Xingfa Gu, Xiaobing Zheng, Jianjun Li, and Maxime Catalfamo, "Method to intercalibrate sunphotometer constants using an integrating sphere as a light source in the laboratory," Appl. Opt. 52, 2226-2234 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-11-2226


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