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Sentinel-2 applications in Africa, a ti hcooperative approach
Marc Leroy
Directorate Innovation, Applications and Sciences
CNES, Toulouse, France
1 Forum Eumetsat Kigali 12-16 September 2016
Scope
Report on Sentinel-2 data access and production of value-added products
Discuss cooperative framework with African stakeholdersstakeholders
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Outline
Sentinel-2 data access – level 1
Sentinel-2 level 2 & 3 data production and access
Cooperation perspectives
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Sentinel-2
Sentinel-2 is part of the Copernicus programme of EU and ESA
Main characteristics :
Global (no programming) Data every 5 days, everywhere 10 m resolution Standard product : orthorectified tiles, size 100 km Data policy : free and open Data policy : free and open
This unique setting represents probably a major turn in thedevelopment of remote sensing applications worldwide
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development of remote sensing applications worldwide
Applications of Sentinel-2
Cartography at country level
Scales 1/200 000 or 1/250 000 easily accessible Map updating up to the 1/50 000 (to be assessed)
Forest monitoring
Agricultural statisticsAgricultural statistics
Urban expansion
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Water bodies monitoring
First images
S2-A : launch on June 22, 2015S2-B : launch in Spring 2017
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Verone, Italia
Data access – S2 level 1C
Data access for any user is now possible since early 2016y p y
At ESA (Sentinel Data Hub) At some EU Member States
For France, CNES has developed PEPS (Plate-Forme d’Exploitation des produits Sentinel)produits Sentinel)
http://peps.cnes.fr
First steps towards EU platform (scheduled 2018)
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PEPS assets
Guaranteed access
Complete archive S1 S2 S3
Opened to all users
Complete archive S1, S2, S3Availability of the whole temporal and spatial archive 7 Po
User friendly access – HelpdeskAttention to Users
Processing meansProcessing close to data
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Processing close to data
User friendly interface
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Data production and access – S2 level 2A & 3A
Operational data production in the THEIA frameworkOperational data production in the THEIA framework
Data production of value-added S2 products is made by CNES in the framework of THEIAframework of THEIA
THEIA is a national network of land Earth observation
Value-added products :p» Level 2A : Atmospheric corrections, Cloud screening operational» Level 3A : Monthly composites operational» Level 3B : Land cover R&D» Level 3B : Land cover R&D
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Example Level 2A producttile 100 x 100 km – region of Pretoria at two dates
CC Level 1C –07/04/16
Level 1C –28/03/16
Level 2A –28/03/16
Level 2A –07/04/16
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tile 100 x 100 km – region of Pretoria at two datesPretoria at two dates
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Level 2A – 28/03/16 Level 2A – 07/04/16
Level 2A – 21/03/16 Level 2A – 07/04/16 Level 2A – 28/03/16
4 tiles 100 x 100 km –region of Pretoria
Level 3A -Monthly
Level 3A –1rst April 2016
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ycomposites
4 tiles 100 x 100 km – region of Pretoria
Level 3A –1rst April 2016
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Data production and access – S2 level 2A & 3A
Production and access status
Operational production of S2 level 2A & 3A just started at CNES
Resources are available for 5 to 10 Mkm2
Data policy : free and open. Access at www.theia-land.fr
Areas of production : partly defined
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First S2 level 2A & 3A production areas
First areas to be produced
28 areas selected, including 11 areas in Africa
Additional areas to be considered in cooperation framework
Full coverage to be Full coverage to be produced by EU/ESA at a later stage
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Enhancing cooperation with Africa
Strengthening public policy consistency and efficiency
Reinforce coordination at national level with other French national institutions : IRD, CIRAD, AFD, …
Better coordinate national efforts with those made in the framework of MESA Better coordinate national efforts with those made in the framework of MESA and GMES & Africa
Implementing demonstration projectsImplementing demonstration projects
Liaise with national African institutions in charge of public policies (e.g. forest, water, agriculture, cartography, urban expansion …)water, agriculture, cartography, urban expansion …)
Demonstrate and make perennial in these institutions the use of S2 data
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Examples of potential international cooperationscooperations
Cartography
Discussions with EMA (Ethiopia) to support with Level 3A data mapping update of Ethiopia at 1/50 000 scale
Forest
Discussions with AGEOS (Gabon) and partners to support with Level 3A data the forest and forest change mapping over Central Africa sub-region
Agricultureg
Discussions with IRD, CIRAD, IGN-FI, AFD and regional partners to support with Level 2A, Level 3A data agriculture national services in Côte d’Ivoire and Sénégal
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Conclusion
Sentinel-2 data access worldwide with a free and open data policy is now possible. CNES contributes with PEPS (http://peps.cnes.fr)
The operational production of value-added Sentinel-2 products started on The operational production of value-added Sentinel-2 products started on selected pilot areas (www.theia-land.fr)
C i i h Af i i b i i i d d l i l Cooperations with African countries can be initiated to develop operational applications on agreed areas
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