Journal
FRONTIERS IN MARINE SCIENCE
Volume 4, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fmars.2017.00140
Keywords
ocean color; remote sensing; Sentinel-3; OLCI; extreme Case-2 waters; neural network; fuzzy logic classification
Funding
- European Space Agency (ESA) [OC-CCI: AO-1/6207/09/I-LG]
- Case-2 Extreme Water project [C2X: 4000113691/15/I-LG]
- Living Planet Fellowship Programme [LowSun-OC: 4000112803/15/I-SBo]
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The processing scheme of a novel in-water algorithm for the retrieval of ocean color products from Sentinel-3 OLCI is introduced. The algorithm consists of several blended neural networks that are specialized for 13 different optical water classes. These comprise clearest natural waters but also waters reaching the frontiers of marine optical remote sensing, namely extreme absorbing, or scattering waters. Considered chlorophyll concentrations reach up to 200 mg m(-3), non-algae particle concentrations up to 1,500g m(-3), and the absorption coefficient of colored dissolved organic matter at 440 nm is up to 20 m(-1). The algorithm generates different concentrations of water constituents, inherent and apparent optical properties, and a color index. In addition, all products are delivered with an uncertainty estimate. A baseline validation of the products is provided for various water types. We conclude that the algorithm is suitable for the remote sensing estimation of water properties and constituents of most natural waters.
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