Title: Sky Dome Correction For Seaprism And Trios Above Water Radiometric Measurements In Mermaid
Authors: BARKER KathrynFRANCIS ZagolskiSANTER RichardKENT ChristopherHUOT Jean-PaulZIBORDI GiuseppeRUDDICK Kevin
Citation: 3rd MERIS/(A)ATSR and OCLI-SLSTR (Sentinel-3) Preparatory Workshop vol. SP-711
Publisher: European Space Agency
Publication Year: 2013
JRC N°: JRC76631
ISBN: 978-92-9092-275-9
ISSN: 1609-042X
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC76631
Type: Articles in periodicals and books
Abstract: The water reflectance derived from in-situ measurements represents a key element in the validation of MERIS (MEdium Resolution Imaging Spectrometer) atmospheric correction over ocean. This above water radiometry comprises simultaneous acquisitions of surface irradiance, downwelling sky radiance and waterleaving radiance which needs to be corrected for the Fresnel reflection of the sky dome by the sea surface. By neglecting the polarization in this correction the reflected sky radiance may induce a bias of several percents in relative error on the marine reflectance. An alternative correction of the sky dome reflection has then been proposed accounting for the polarized nature of the light scattered by the atmosphere and of the Fresnel reflection. Two sky dome correction tools have been developed to be implemented in the MERMAID (MERis MAtchup In-situ Database) processing chain of in-situ data from AERONET-OC (SeaPRISM) and MUMM (TriOS). For each data sequence acquired over a matchup, the correction is achieved using the aerosol parameters extracted from the MERIS level-2 product.
JRC Directorate:Sustainable Resources

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