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Reconstruction of vertical profiles of the absorption and scattering coefficients from multispectral radiances

Author

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  • Souto, R.P.
  • Campos Velho, H.F.
  • Stephany, S.

Abstract

An inverse hydrologic optics problem is solved using a recent intrinsic regularization scheme that is coupled to a standard Ant Colony System (ACS). The regularization scheme pre-selects candidate solutions based on their smoothness, quantified by a Tikhonov norm. The Chlorophyll profile is reconstructed from upwelling radiance experimental measurements in the ocean water using 10 wavelengths (multispectral approach) and upward polar directions. Vertical profiles of the absorption and scattering coefficients are estimated from the Chlorophyll profile by means of bio-optical models. The inverse problem is formulated as an optimization problem and iteratively solved by an ACS using the radiative transfer equation as direct model. An objective function is given by the square difference between computed and experimental radiances at every iteration. Each candidate solution corresponds to a discrete Chlorophyll profile. The radiative transfer equation is solved using the Laplace transform discrete ordinate (LTSN) method. A parallel implementation of the Ant Colony System is used and executed in a distributed memory machine.

Suggested Citation

  • Souto, R.P. & Campos Velho, H.F. & Stephany, S., 2006. "Reconstruction of vertical profiles of the absorption and scattering coefficients from multispectral radiances," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 73(1), pages 255-267.
    • Handle: RePEc:eee:matcom:v:73:y:2006:i:1:p:255-267
    DOI: 10.1016/j.matcom.2006.06.007
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    Cited by:

    1. Abbas Afshar & Fariborz Massoumi & Amin Afshar & Miquel Mariño, 2015. "State of the Art Review of Ant Colony Optimization Applications in Water Resource Management," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 29(11), pages 3891-3904, September.

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