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Applied Optics

Applied Optics


  • Vol. 44, Iss. 7 — Mar. 1, 2005
  • pp: 1236–1249

Model of remote-sensing reflectance including bidirectional effects for case 1 and case 2 waters

Young-Je Park and Kevin Ruddick  »View Author Affiliations

Applied Optics, Vol. 44, Issue 7, pp. 1236-1249 (2005)

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A remote-sensing reflectance model based on a lookup table is proposed for use in analyzing satellite ocean color data in both case 1 and case 2 waters. The model coefficients are tabulated for grid values of three angles—solar zenith, sensor zenith, and relative azimuth—to take account of directional variation. This model also requires, as input, a phase function parameter defined by the contribution of suspended particles to the backscattering coefficient. The model is generated from radiative transfer simulations for a wide range of inherent optical properties that cover both case 1 and 2 waters. The model uncertainty that is due to phase function variability is significantly reduced from that in conventional models. Bidirectional variation of reflectance is described and explained for a variety of cases. The effects of wind speed and cloud cover on bidirectional variation are also considered, including those for the fully overcast case in which angular variation can still be considerable (~10%). The implications for seaborne validation of satellite-derived water-leaving reflectance are discussed.

© 2005 Optical Society of America

OCIS Codes
(010.4450) Atmospheric and oceanic optics : Oceanic optics
(010.7340) Atmospheric and oceanic optics : Water
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(290.1350) Scattering : Backscattering

Original Manuscript: March 17, 2004
Revised Manuscript: October 4, 2004
Manuscript Accepted: October 29, 2004
Published: March 1, 2005

Young-Je Park and Kevin Ruddick, "Model of remote-sensing reflectance including bidirectional effects for case 1 and case 2 waters," Appl. Opt. 44, 1236-1249 (2005)

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