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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 36 — Dec. 20, 2008
  • pp: 6723–6733

Near-infrared digital photography to estimate snow correlation length for microwave emission modeling

Ally Mounirou Toure, Kalifa Goïta, Alain Royer, Christian Mätzler, and Martin Schneebeli  »View Author Affiliations


Applied Optics, Vol. 47, Issue 36, pp. 6723-6733 (2008)
http://dx.doi.org/10.1364/AO.47.006723


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Abstract

The study is based on experimental work conducted in alpine snow. We made microwave radiometric and near-infrared reflectance measurements of snow slabs under different experimental conditions. We used an empirical relation to link near-infrared reflectance of snow to the specific surface area (SSA), and converted the SSA into the correlation length. From the measurements of snow radiances at 21 and 35 GHz , we derived the microwave scattering coefficient by inverting two coupled radiative transfer models (the sandwich and six-flux model). The correlation lengths found are in the same range as those determined in the literature using cold laboratory work. The technique shows great potential in the determination of the snow correlation length under field conditions.

© 2008 Optical Society of America

OCIS Codes
(120.5630) Instrumentation, measurement, and metrology : Radiometry
(120.5700) Instrumentation, measurement, and metrology : Reflection
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(280.4991) Remote sensing and sensors : Passive remote sensing

ToC Category:
Remote Sensing and Sensors

History
Original Manuscript: May 9, 2008
Revised Manuscript: November 3, 2008
Manuscript Accepted: October 22, 2008
Published: December 12, 2008

Citation
Ally Mounirou Toure, Kalifa Goïta, Alain Royer, Christian Mätzler, and Martin Schneebeli, "Near-infrared digital photography to estimate snow correlation length for microwave emission modeling," Appl. Opt. 47, 6723-6733 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-36-6723

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