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Applied Optics

Applied Optics


  • Vol. 39, Iss. 20 — Jul. 10, 2000
  • pp: 3433–3442

Effect of the observation length on the two-dimensional shadowing function of the sea surface: application on infrared 3–13-µm emissivity

Christophe Bourlier, Joseph Saillard, and Gérard Berginc  »View Author Affiliations

Applied Optics, Vol. 39, Issue 20, pp. 3433-3442 (2000)

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An analytical approach of the two-dimensional emissivity of a rough sea surface in the infrared band is presented. The emissivity characterizes the intrinsic radiation of the sea surface. Because the temperature measured by the infrared camera depends on the emissivity, the emissivity is a relevant parameter for retrieving the sea-surface temperature from remotely sensed radiometric measurements, such as from satellites. This theory is developed from the first-order geometrical-optics approximation and is based on recent research. The typical approach assumes that the slope in the upwind direction is greater than the slope in the crosswind direction, involving the use of a one-dimensional shadowing function with the observed surface assumed to be infinite. We introduce the two-dimensional shadowing function and the surface observation length parameters that are included in the modeling of the two-dimensional emissivity.

© 2000 Optical Society of America

OCIS Codes
(000.5490) General : Probability theory, stochastic processes, and statistics
(010.4450) Atmospheric and oceanic optics : Oceanic optics
(030.6600) Coherence and statistical optics : Statistical optics
(080.2720) Geometric optics : Mathematical methods (general)

Original Manuscript: October 18, 1999
Revised Manuscript: April 24, 2000
Published: July 10, 2000

Christophe Bourlier, Joseph Saillard, and Gérard Berginc, "Effect of the observation length on the two-dimensional shadowing function of the sea surface: application on infrared 3–13-µm emissivity," Appl. Opt. 39, 3433-3442 (2000)

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