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Performance of Copernicus Sentinel-2 Level-2A processor Sen2Cor dependent on cloudiness

Pflug, Bringfried and Main-Knorn, Magdalena and Louis, Jérôme and Debaecker, Vincent and Müller-Wilms, Uwe and Gascon, Ferran and Boccia, Valentina (2019) Performance of Copernicus Sentinel-2 Level-2A processor Sen2Cor dependent on cloudiness. 2019 Living Planet Symposium (LPS), 13.-17. Mai 2019, Mailand, Italien.

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Official URL: https://lps19.esa.int/NikalWebsitePortal/living-planet-symposium-2019/lps19

Abstract

The Copernicus programme is a European initiative for the implementation of information services dealing with environment and security, mainly based on observation data received from Earth Observation (EO) satellites. In the frame of this programme, ESA launched the Copernicus Sentinel- 2A and Sentinel-2B optical imaging satellites. These satellites deliver a new generation of optical data products designed to directly feed downstream services mainly related to land monitoring, emergency management and security. To ensure the highest quality of service for the Copernicus Sentinel-2 mission, ESA set up the Sentinel-2 Mission Performance Centre (MPC) supported by several Expert Support Laboratories (ESL). This presentation reports results of performance analysis of the Sentinel-2 Level-2A processor Sen2Cor performed by the ESL-L2A. Sen2Cor Level 2A processing is applied to Top-Of-Atmosphere (TOA) Level 1C ortho-image reflectance products. Sen2Cor L2A outputs are a scene classification image, aerosol and water vapour maps and the ortho-image surface reflectance (SR) product. SR is a Bottom-Of-Atmosphere (BOA) reflectance product corrected for the influence of the atmosphere. Scene classification is generated together with Quality Indicators for cloud and snow probabilities. Many earth remote sensing applications rely on time series of satellite data. However at many locations on the globe it is almost impossible to build time series relying only on cloudless data due the cloudiness of the region.. Generally time series get denser if they can include data containing some clouds. However, how accurate and reliable are L2A satellite products of cloudy images? To answer this question, the presentation is focused on providing Sen2Cor performance in dependence of cloud cover of the images. Sen2Cor performance of AOT and WV retrieval is analysed by direct comparison of Sen2Cor outputs with reference data provided by AERONET sunphotometers. Quality assessment of SR outputof Sen2Cor is based on AERONET corrected SR as reference. AERONET corrected SR are obtained by performing the atmospheric correction with in input the aerosol and WV information given by AERONET instruments. The analysis is performed within 9 km x 9 km area around the location of sunphotometer for more than 20 AERONET sites around the globe, covering different surface types, latitudes, climate zones and atmospheric conditions.

Item URL in elib:https://elib.dlr.de/126369/
Document Type:Conference or Workshop Item (Poster)
Title:Performance of Copernicus Sentinel-2 Level-2A processor Sen2Cor dependent on cloudiness
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Pflug, Bringfriedbringfried.pflug (at) dlr.deUNSPECIFIED
Main-Knorn, Magdalenamagdalena.main-knorn (at) dlr.deUNSPECIFIED
Louis, Jérômejerome.louis (at) telespazio.comUNSPECIFIED
Debaecker, Vincentvincent.debaecker (at) telespazio.comUNSPECIFIED
Müller-Wilms, UweUwe.Mueller-Wilm (at) telespazio-vega.deUNSPECIFIED
Gascon, FerranFerran.gascon (at) esa.intUNSPECIFIED
Boccia, ValentinaESA/ESRIN, Frascati, ItalienUNSPECIFIED
Date:May 2019
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Copernicus, Sentinel-2, Sen2Cor, cloudiness, atmospheric correction
Event Title:2019 Living Planet Symposium (LPS)
Event Location:Mailand, Italien
Event Type:international Conference
Event Dates:13.-17. Mai 2019
Organizer:ESA
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 , Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > Photogrammetry and Image Analysis
Deposited By: Zielske, Mandy
Deposited On:05 Feb 2019 09:06
Last Modified:31 Jul 2019 20:24

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