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Apparent optical properties of the aerosols for MERIS/OLCI-S3: Selection of best LUTs for atmospheric correction over ocean
Zagolski, F.; Santer, R.; Aznay, O. (2012). Apparent optical properties of the aerosols for MERIS/OLCI-S3: Selection of best LUTs for atmospheric correction over ocean. Adrinord/ParBleu Technologies/Université du Littoral Côte d’Opale: Lille, St Jean-sur-Richelieu and Wimereux. 1 poster pp.

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Document type: Poster

Keyword
    Marine

Authors  Top 
  • Zagolski, F.
  • Santer, R., more
  • Aznay, O., more

Abstract
    In the aerosol remote sensing algorithm over ocean, the models are deduced from the spectral dependence of the path radiances in the near-infrared (NIR) region. Based on these derived optical properties, the atmospheric signal is then extrapolated from the NIR to the shorter wavelengths in the visible (VIS) domain. To perform such a classical atmospheric correction scheme requires a well defined climatology representative of the aerosols encountered in remote areas of oceans.Different climatologies are candidate to be implemented as auxiliary data (i.e., look-up tables) including radiative properties of the aerosols. In the MERIS (MEdium Resolution Imaging Spectrometer) atmospheric correction algorithm over ocean, we will consider: (i) the standard aerosol models (SAMs) used in the 3rd MERIS reprocessing, (ii) the new set of AERONET (AErosol RObotic NETwork) derived models characterized by their micro-physical properties, and (iii) the new set of AERONET derived models by WOPAER described through their inherent optical properties (IOPs). All sets are processed with the MERIS Auxiliary data Tool (MERISAT) for generating these LUTs for the MEGS (MERIS-ESA Ground Segment) prototype.By using ODESA (Optical Data processor of ESA), the MERIS level-1 data extracted from MERMAID (MERis MAtchup In-situ Database) will be processed to get the level-2 data. AAOT (Acqua Alta Oceanographic Tower, Venice-Italy) being a reference station for MERIS Cal/Val activities, this site will be then selected to evaluate the MERIS level-2 aerosol products as well as the retrieved marine reflectance, obtained for each of the three sets of aerosol LUTs.

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