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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 38, Iss. 3 — Jan. 20, 1999
  • pp: 451–455

Atmospheric correction of ocean color sensors: computing atmospheric diffuse transmittance

Menghua Wang  »View Author Affiliations


Applied Optics, Vol. 38, Issue 3, pp. 451-455 (1999)
http://dx.doi.org/10.1364/AO.38.000451


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Abstract

Using the reciprocal equation derived by Yang and Gordon [Appl. Opt. 36, 7887–7897 (1997)] for atmospheric diffuse transmittance of the ocean–atmosphere system, I examined the accuracy of an analytical equation proposed by Gordon et al. [Appl. Opt. 22, 20–36 (1983)] in computing the atmospheric diffuse transmittance for wavelengths from 412 to 865 nm for both a pure Rayleigh and a two-layer Rayleigh-aerosol atmosphere overlying a flat Fresnel-reflecting ocean surface. It was found that for viewing angles up to approximately 40°, the analytical formula produces errors usually between 2% and 3% for nonabsorbing and weakly absorbing aerosols and for aerosol optical thicknesses τ a ≤ 0.4. The error increases with an increase in aerosol absorption, aerosol optical thickness, and viewing angle, and with the decrease of wavelength. By a simple numerical fit to modify the analytical formula, the atmospheric diffuse transmittance can be accurately computed usually to within ∼1% (∼0.5% in most cases) for a variety of aerosol models, aerosol optical thicknesses τ a ≤ 0.6, viewing angles θ ≤ 60°, different aerosol vertical structure distribution, and for wavelengths from 412 to 865 nm.

© 1999 Optical Society of America

OCIS Codes
(010.1290) Atmospheric and oceanic optics : Atmospheric optics
(010.1320) Atmospheric and oceanic optics : Atmospheric transmittance
(010.4450) Atmospheric and oceanic optics : Oceanic optics
(280.0280) Remote sensing and sensors : Remote sensing and sensors

History
Original Manuscript: April 3, 1998
Revised Manuscript: October 7, 1998
Published: January 20, 1999

Citation
Menghua Wang, "Atmospheric correction of ocean color sensors: computing atmospheric diffuse transmittance," Appl. Opt. 38, 451-455 (1999)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-38-3-451


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References

  1. H. R. Gordon, M. Wang, “Retrieval of water-leaving radiance and aerosol optical thickness over the oceans with SeaWiFS: a preliminary algorithm,” Appl. Opt. 33, 443–452 (1994). [CrossRef] [PubMed]
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  4. H. Yang, H. R. Gordon, “Remote sensing of ocean color: assessment of water-leaving radiance bidirectional effects on atmospheric diffuse transmittance,” Appl. Opt. 36, 7887–7897 (1997). [CrossRef]
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  6. H. R. Gordon, D. K. Clark, J. L. Mueller, W. A. Hovis, “Phytoplankton pigments from the Nimbus-7 Coastal Zone Color Scanner: comparisons with surface measurements,” Science 210, 63–66 (1980). [CrossRef] [PubMed]
  7. E. P. Shettle, R. W. Fenn, “Models for the aerosols of the lower atmosphere and the effects of humidity variations on their optical properties,” (U.S. Air Force Geophysics Laboratory, Hanscom Air Force Base, Mass., 1979).
  8. C. Junge, “Atmospheric chemistry,” Adv. Geophys. 4, 1–108 (1958). [CrossRef]

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