Y.J. Meijer, GECA, II GALION WS, 22-09-2010 ESA’s Generic Environment for Calibration/validation Analysis (GECA) Yasjka Meijer et al. European Space Agency

Y.J. Meijer, GECA, II GALION WS, 22-09-2010

ESA’s Generic Environment for Calibration/validation Analysis (GECA)

Yasjka Meijer et al.European Space Agency

Frascati, Italy


GECA

GECA – a Generic Environment for Calibration and Validation Analysis

1. GECA Validation data Centre (GVDC)– ESA’s Next Generation Validation Data

Centre (extending EVDC @ NILU)

2. Quality Information and Action Protocol: QIAP


Motivation for GECA, 1/2Motivation:

• More and more missions to be validated:– GMES Sentinels– Earth Explorers (e.g., SMOS, Aeolus, EarthCARE)– ESA – Third Party Missions

• Knowledge transfer from ERS-1&2 and ENVISAT (with decreasing operational budget)

more efficient validation necessary facilitate independent cal/val activities

• Longer ESA data records; exploitation for climate science (CCI)

high demand for inter-satellite calibration


Motivation for GECA, 2/2Why Generic?

– Most Cal/Val activities and needs are generic across multiple EO domains

Efficiency (avoid island solutions with duplications, e.g. aux. data, conversions, overlap calc., analysis tools )

– Use of standard interfaces and metadata standards (GENESI-DR & GEOMS)Expandability

Allowing easy addition of - new correlative data centers- EO satellite data- analysis tools


GVDC Objectives

• Harmonise correlative data standards(via Generic EO Metadata Standard (GEOMS))

• Access to satellite data centres(via GENESI-DR)

• Access to correlative data centres(via Data Centre InterOperability (DCIO), OAI-PMH)

• Support collocation detection(match satellite with correlative dataset)

• Support intercomparison (tools)• Assist correlative data submitters


GECA server

Correlative data - DCIO

+?

OAI-PMH Harvest catalogue metadata

MERIS AATSR RA-2 GOCE

SARGOMOS MIPAS Aeolus

Correlative Data

Catalogue

GENESI-DR

Satellite Data

Catalogue

Collocationtool

Collocation CatalogueUse case:

Find data

Harvest catalogue metadata

Catalogue access

ESA satellite data


GECA server

Satellite Overpass Catalogue

OverpassIPF

Data download access


+?MERIS AATSR RA-2 GOCE


ESA satellite data

Correlative Data

Catalogue

Satellite Data

Catalogue

Collocation Catalogue

Use case:

Get data

Agreements will allow downloading from DCIO databases

GENESI-DR provide access details to ESA

data repositories

Data can be used on server or

downloaded to the user

Child productsdatabase

Data access


GECA database

server


+?

OAI-PMH catalogue metadata

Data files

MERIS AATSR RA-2 GOCE


ESA satellite data – HTTP & direct FTP

catalogue

metadata

tools

Dat

a fil

es

User 1:

collocation info

User 2: User 3:

paired data files

tools

localtools

comparison

reports

toolslocaldata

GENESI-DR

Opportunities:- New tools- New DCIO partner- More satellite data


GECA sample screen


GECA tools

Intercomparison Toolbox:• Based on ‘best practice’ analysis functions• Pre-processing functions bringing data into comparable state, e.g.,

– conversion of paired data to a common format– inclusion of auxiliary data (e.g., meteorological parameters from ECMWF– parameter conversion (e.g., partition wave spectra, air pressure to

altitude)– comparison algorithms (e.g., cross associate partitions, area overlap– regridding and smoothing of data


GECA implementationImplementation:• GECA tools will be available online and as toolbox• Expandable and open environment; opportunity to

include new missions, domains and tools• In cloud-computing environment • GECA is foreseen as portlets inside the CEOS Cal/Val

Portal: http://calvalportal.ceos.org/cvp/


GECA project status

• Critical Design Review (CDR) passed– development started in April 2010

• Initial system due in Q4/2010– mainly for testing

• Full system due in first half of 2011– operational for ERS-1/-2, ENVISAT, MODIS– accessible for external users


Conclusion

• GECA will offer a generic and comprehensive validation environment with many new functionalities supporting the process of independent validation

• Subscribe to GECA mailing list with an email to [email protected]


Thank you!


Backup slides


GECA/GEOMS

GEOMS:Generic EO Metadata Standard

– GEOMS is a dedicated metadata standard for EO Cal/Val activities

– GEOMS has been established in collaboration with AVDC (NASA), EVDC (NILU/ESA), ESA, BIRA and NDACC

• Focus on atmosphere, • now also broadened to other domains

– GECA will host data GEOMS (Generic EO Metadata Standard) format


GECA/DCIO

DCIO: Data Centre Interoperability

• GECA will host correlative datasets of multiple EO domains– Requirement for interoperability between data centres

• Initiation of DCIO activity– Access to wider range of correlative datasets

• Current DCIO partners: AVDC, EVDC, NDACC and Earlinet

• Prototypes are working for exchange of catalogue meta-data

• Metadata catalogue in GECA will allow data to be visible in peer data centres

• Opportunity to join DCIO !


Covered EO domains/instruments

Envisat (RA-2), ERS-2 (RA-1), GOCE, SWARM

Solid Earth (gravity, geoid, geomagnetic field)

Cryosat-II (SIRAL), Envisat (RA-2), ERS-2 (RA-1)

Land and Sea Ice

Sentinel-2Multi-spectral imagery

Envisat (AATSR, MERIS, RA-2, ASAR), ERS-2 (ATSR, RA-1, SAR), Sentinel-1 (SAR), Sentinel-2Sentinel-3 (SLSTR, OLCI), SMOS

Land (cover, LST, vegetation, etc.)

Envisat (AATSR, MERIS, RA-2, ASAR), ERS-2 (ATSR, RA-1, SAR), Sentinel-1 (SAR), Sentinel-3 (SLSTR, OLCI), GOCE, SMOS (MIRAS)

Ocean and Coast (waves, colour, currents, SST, salinity, etc.)

EarthCARE (ATLID, BBR, CPR, MSI), ADM-Aeolus (ALADIN)

Atmospheric Physics

Envisat (GOMOS, MIPAS, SCIA), ERS-2 (GOME), Metop series (GOME-2), Sentinel-4, -5 & -5p

Atmospheric Chemistry

Satellite mission (instrument)EO Domain

Envisat (RA-2), ERS-2 (RA-1), GOCE, SWARM

Solid Earth (gravity, geoid, geomagnetic field)

Cryosat-II (SIRAL), Envisat (RA-2), ERS-2 (RA-1)

Land and Sea Ice

Sentinel-2Multi-spectral imagery

Envisat (AATSR, MERIS, RA-2, ASAR), ERS-2 (ATSR, RA-1, SAR), Sentinel-1 (SAR), Sentinel-2Sentinel-3 (SLSTR, OLCI), SMOS

Land (cover, LST, vegetation, etc.)

Envisat (AATSR, MERIS, RA-2, ASAR), ERS-2 (ATSR, RA-1, SAR), Sentinel-1 (SAR), Sentinel-3 (SLSTR, OLCI), GOCE, SMOS (MIRAS)

Ocean and Coast (waves, colour, currents, SST, salinity, etc.)

EarthCARE (ATLID, BBR, CPR, MSI), ADM-Aeolus (ALADIN)

Atmospheric Physics

Envisat (GOMOS, MIPAS, SCIA), ERS-2 (GOME), Metop series (GOME-2), Sentinel-4, -5 & -5p

Atmospheric Chemistry

Satellite mission (instrument)EO DomainGeneric System approach covering multiple EO domains:

– Atmospheric Physics– Ocean and Coast (waves,

colour, SST, etc.)– Terrestrial (Land Cover, LST,

vegetation, etc.)– Multi-spectral imagery– Cryosphere (Land and Sea

Ice)– Solid Earth (gravity, geoid,

etc.)

Documents

Y.J. Meijer, GECA, II GALION WS, 22-09-2010 ESA’s Generic Environment for Calibration/validation Analysis (GECA) Yasjka Meijer et al. European Space Agency