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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 21 — Jul. 20, 2008
  • pp: 3846–3859

Improving atmospheric correction for highly productive coastal waters using the short wave infrared retrieval algorithm with water-leaving reflectance constraints at 412 nm

Min Oo, Marco Vargas, Alex Gilerson, Barry Gross, Fred Moshary, and Sam Ahmed  »View Author Affiliations


Applied Optics, Vol. 47, Issue 21, pp. 3846-3859 (2008)
http://dx.doi.org/10.1364/AO.47.003846


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Abstract

The recently developed short wave infrared (SWIR) atmospheric correction algorithm for ocean color retrieval uses long wavelength channels to retrieve atmospheric parameters to avoid bright pixel contamination. However, this retrieval is highly sensitive to errors in the aerosol model, which is magnified by the higher variability of aerosols observed over urban coastal areas. While adding extra regional aerosol models into the retrieval lookup tables would tend to increase retrieval error since these models are hard to distinguish in the IR, we explore the possibility that for highly productive waters with high colored dissolved organic matter, an estimate of the 412 nm channel water-leaving reflectance can be used to constrain the aerosol model retrieval and improve the water-leaving reflectance retrieval. Simulations show that this constraint is particularly useful where aerosol diversity is significant. To assess this algorithm we compare our retrievals with the operational SeaWiFS Data Analysis System (SeaDAS) SWIR and near infrared retrievals using in situ validation data in the Chesapeake Bay and show that, especially for absorbing aerosols, significant improvement is obtained. Further insight is also obtained by the intercomparison of retrieved remote sensing reflectance images at 443 and 551 nm , which demonstrates the removal of anomalous artifacts in the operational SeaDAS retrieval.

© 2008 Optical Society of America

OCIS Codes
(010.1110) Atmospheric and oceanic optics : Aerosols
(010.1690) Atmospheric and oceanic optics : Color
(010.0280) Atmospheric and oceanic optics : Remote sensing and sensors

ToC Category:
Atmospheric and Oceanic Optics

History
Original Manuscript: September 19, 2007
Revised Manuscript: May 12, 2008
Manuscript Accepted: May 13, 2008
Published: July 16, 2008

Virtual Issues
Vol. 3, Iss. 8 Virtual Journal for Biomedical Optics

Citation
Min Oo, Marco Vargas, Alex Gilerson, Barry Gross, Fred Moshary, and Sam Ahmed, "Improving atmospheric correction for highly productive coastal waters using the short wave infrared retrieval algorithm with water-leaving reflectance constraints at 412 nm," Appl. Opt. 47, 3846-3859 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-21-3846

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