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Applied Optics

Applied Optics


  • Vol. 39, Iss. 3 — Jan. 20, 2000
  • pp: 361–375

Adjacency effects on water surfaces: primary scattering approximation and sensitivity study

Richard Santer and Catherine Schmechtig  »View Author Affiliations

Applied Optics, Vol. 39, Issue 3, pp. 361-375 (2000)

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The making of atmospheric corrections is a critical task in the interpretation of ocean color imagery. In coastal areas, a fraction of the light reflected by the land reaches a sensor. Modeling the reduction of image contrast when the atmospheric turbidity increases, the so-called adjacency effect, requires large amounts of computing time. To model this effect we developed a simple approach based on the primary scattering approximation for both nadir and off-nadir views. A sensitivity study indicates that the decisive criterion for measurement accuracy for aerosols is their vertical distribution. As this distribution cannot generally be determined from space, it is not possible to include a suitable correction of the adjacency effects on satellite imagery. Conversely, we propose a simple correction for molecular scattering based on the isotropic approximation. We also address the problem of reduction of the coupling between the Fresnel reflection and the atmosphere for observations of coastal water. We study the influence of the adjacency effects on determination of the abundance of chlorophyll in water by combining use of the red and the infrared bands for aerosol remote sensing and the blue/green-ratio technique for retrieval of these data.

© 2000 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.1310) Atmospheric and oceanic optics : Atmospheric scattering
(010.4450) Atmospheric and oceanic optics : Oceanic optics

Original Manuscript: March 8, 1999
Revised Manuscript: July 16, 1999
Published: January 20, 2000

Richard Santer and Catherine Schmechtig, "Adjacency effects on water surfaces: primary scattering approximation and sensitivity study," Appl. Opt. 39, 361-375 (2000)

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