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Algorithms 2009, 2(1), 470-497; doi:10.3390/a2010470

Semi-empirical Algorithm for the Retrieval of Ecology-Relevant Water Constituents in Various Aquatic Environments

1, 2,* , 1, 2
1 Nansen International Environmental and Remote Sensing Centre / 14th line 7, St. Petersburg, Russia 2 Nansen Environmental and Remote Sensing Centre / Thormohlensgt. 47, Bergen, Norway 3 Norwegian Institute for Water Research / Gaustadalleen 21Oslo, Norway 4 Michigan Tech Research Institute / 3600 Green Court, Suite 100, Ann Arbor, USA
* Author to whom correspondence should be addressed.
Received: 27 October 2008 / Revised: 11 January 2009 / Accepted: 25 February 2009 / Published: 10 March 2009
(This article belongs to the Special Issue Sensor Algorithms)
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An advanced operational semi-empirical algorithm for processing satellite remote sensing data in the visible region is described. Based on the Levenberg-Marquardt multivariate optimization procedure, the algorithm is developed for retrieving major water colour producing agents: chlorophyll-a, suspended minerals and dissolved organics. Two assurance units incorporated by the algorithm are intended to flag pixels with inaccurate atmospheric correction and specific hydro-optical properties not covered by the applied hydro-optical model. The hydro-optical model is a set of spectral cross-sections of absorption and backscattering of the colour producing agents. The combination of the optimization procedure and a replaceable hydro-optical model makes the developed algorithm not specific to a particular satellite sensor or a water body. The algorithm performance efficiency is amply illustrated for SeaWiFS, MODIS and MERIS images over a variety of water bodies.
Keywords: satellite remote sensing; water quality; operational algorithm satellite remote sensing; water quality; operational algorithm
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Korosov, A.A.; Pozdnyakov, D.V.; Folkestad, A.; Pettersson, L.H.; Sørensen, K.; Shuchman, R. Semi-empirical Algorithm for the Retrieval of Ecology-Relevant Water Constituents in Various Aquatic Environments. Algorithms 2009, 2, 470-497.

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