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Sen2Cor Atmospheric Correction with Meteorological Aerosol Optical Thickness

Louis, Jérôme and Pflug, Bringfried and Debaecker, Vincent and Müller-Wilm, Uwe and Gascon, Ferran (2018) Sen2Cor Atmospheric Correction with Meteorological Aerosol Optical Thickness. LPVE2018 - Workshop on Land Product Validation and Evolution, 27.Feb. - 01.März 2018, Frascati (Rom), Italien.

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Official URL: https://earth.esa.int/web/guest/events/all-events/-/article/lpve2018-workshop-on-land-product-validation-and-evolution

Abstract

Sen2Cor is a Level-2A processor with the main purpose to correct single-date Sentinel-2 Level1C products from the effects of the atmosphere in order to deliver a Level-2A surface reflectance(SR)product. Side products are Cloud Screening and Scene Classification, Aerosol Optical Thickness (AOT) and Water Vapour(WV) maps. The accuracy of the retrieved surface reflectance product is strongly related to the accuracy of the atmospheric Parameters used during the atmospheric correction process, mainly the Aerosol Optical Thickness and the Water Vapour content. The Validation results of Sen2Cor have shown that the retrieval of water vapour is very accurate, whereas the method used to estimate the Aerosol Optical Thickness (AOT)at 550nm, the Dark Dense Vegetation (DDV)Pixel method, faces some limitations. The AOT estimation is not possible when there are no DDV Pixels in the image. The current fallback solution for that case is to perform the atmospheric correction starting with a default AOT value. A novel fallback solution for Sen2Cor is presented. The idea is to use AOT estimates at 550nm from the Copernicus Atmosphere Monitoring Service (CAMS)retrieved from ECMWF. A first Quality assessment of These meteorological AOT data overselected AERONET testsites is presented. Then the method of pre-processing and ingestion of this meteorological data in the Sen2Cor atmospheric correction module is described. Preliminary results are illustrated with an example of L2A surface reflectance product over a specific testsite.

Item URL in elib:https://elib.dlr.de/119322/
Document Type:Conference or Workshop Item (Poster)
Title:Sen2Cor Atmospheric Correction with Meteorological Aerosol Optical Thickness
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Louis, Jérômejerome.louis (at) telespazio.comUNSPECIFIED
Pflug, BringfriedBringfried.Pflug (at) dlr.dehttps://orcid.org/0000-0002-4626-9393
Debaecker, Vincentvincent.debaecker (at) telespazio.comUNSPECIFIED
Müller-Wilm, UweUwe.Mueller-Wilm (at) telespazio-vega.deUNSPECIFIED
Gascon, FerranFerran.gascon (at) esa.intUNSPECIFIED
Date:2018
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Sen2Cor, Atmospheric correction, Aerosol Optical Thickness (AOT)
Event Title:LPVE2018 - Workshop on Land Product Validation and Evolution
Event Location:Frascati (Rom), Italien
Event Type:international Conference
Event Dates:27.Feb. - 01.März 2018
Organizer:ESA-ESRIN
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben hochauflösende Fernerkundungsverfahren
Location: Berlin-Adlershof
Institutes and Institutions:Remote Sensing Technology Institute > Photogrammetry and Image Analysis
Deposited By: Zielske, Mandy
Deposited On:22 Mar 2018 20:03
Last Modified:31 Jul 2019 20:16

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