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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 1 — Jan. 14, 2013
  • pp: 605–617

Inter-comparison of hemispherical conical reflectance factors (HCRF) measured with four fibre-based spectrometers

K. Anderson, M. Rossini, J. Pacheco-Labrador, M. Balzarolo, A. Mac Arthur, F. Fava, T. Julitta, and L. Vescovo  »View Author Affiliations


Optics Express, Vol. 21, Issue 1, pp. 605-617 (2013)
http://dx.doi.org/10.1364/OE.21.000605


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Abstract

We describe the results of an experiment designed to compare the radiometric performance of four different spectroradiometers in ideal field conditions. A carefully designed experiment where instruments were simultaneously triggered was used to measure the Hemispherical Conical Reflectance Factors (HCRF) of four targets of varying reflectance. The experiment was in two parts. Stage 1 covered a 2 hour period finishing at solar noon, where 50 measurements of the targets were collected in sequence. Stage 2 comprised 10 rapid sequential measurements over each target. We applied a method for normalising full width half maximum (FWHM) differences between the instruments, which was a source of variability in the raw data. The work allowed us to determine data reproducibility, and we found that lower-cost instruments (Ocean Optics and PP Systems) produced data of similar radiometric quality to those manufactured by Analytical Spectral Devices (ASD –here we used the ASD FieldSpec Pro) in the spectral range 400-850 nm, which is the most significant region for research communities interested in measuring vegetation dynamics. Over the longer time-series there were changes in HCRF caused by the structural and spectral characteristics of some targets.

© 2013 OSA

OCIS Codes
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Remote Sensing

History
Original Manuscript: August 22, 2012
Revised Manuscript: November 2, 2012
Manuscript Accepted: November 4, 2012
Published: January 7, 2013

Citation
K. Anderson, M. Rossini, J. Pacheco-Labrador, M. Balzarolo, A. Mac Arthur, F. Fava, T. Julitta, and L. Vescovo, "Inter-comparison of hemispherical conical reflectance factors (HCRF) measured with four fibre-based spectrometers," Opt. Express 21, 605-617 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-1-605


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