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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 19 — Jul. 1, 2009
  • pp: 3664–3670

Soil emissivity and reflectance spectra measurements

José A. Sobrino, Cristian Mattar, Pablo Pardo, Juan C. Jiménez-Muñoz, Simon J. Hook, Alice Baldridge, and Rafael Ibañez  »View Author Affiliations


Applied Optics, Vol. 48, Issue 19, pp. 3664-3670 (2009)
http://dx.doi.org/10.1364/AO.48.003664


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Abstract

We present an analysis of the laboratory reflectance and emissivity spectra of 11 soil samples collected on different field campaigns carried out over a diverse suite of test sites in Europe, North Africa, and South America from 2002 to 2008. Hemispherical reflectance spectra were measured from 2.0 to 14 μm with a Fourier transform infrared spectrometer, and x-ray diffraction analysis (XRD) was used to determine the mineralogical phases of the soil samples. Emissivity spectra were obtained from the hemispherical reflectance measurements using Kirchhoff’s law and compared with in situ radiance measurements obtained with a CIMEL Electronique CE312-2 thermal radiometer and converted to emissivity using the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) temperature and emissivity separation algorithm. The CIMEL has five narrow bands at approximately the same positions as the ASTER. Results show a root mean square error typically below 0.015 between laboratory emissivity measurements and emissivity measurements derived from the field radiometer.

© 2009 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(300.6300) Spectroscopy : Spectroscopy, Fourier transforms

ToC Category:
Spectroscopy

History
Original Manuscript: April 15, 2009
Manuscript Accepted: May 20, 2009
Published: June 23, 2009

Citation
José A. Sobrino, Cristian Mattar, Pablo Pardo, Juan C. Jiménez-Muñoz, Simon J. Hook, Alice Baldridge, and Rafael Ibañez, "Soil emissivity and reflectance spectra measurements," Appl. Opt. 48, 3664-3670 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-19-3664

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