CEOS Ocean Colour Radiometry - Virtual Constellation

Co-Chairs:Paul DiGiacomo (NOAA/NESDIS, USA)
Craig Donlon (ESA, EU)
Ewa Kwiatkowska (EUMETSAT, EU)

CEOS (Committee on Earth Observation Satellites) developed the concept of virtual, space-based Constellations in support of GEO (Group on Earth Observations) objectives, and as a space component of GEOSS (Global Earth Observation System of Systems). A CEOS Virtual Constellation is a set of space and ground segment capabilities operating together in a coordinated manner, in effect a virtual system that overlaps in coverage in order to meet a combined and common set of Earth Observation requirements. The individual satellites and ground segments can belong to a single or to multiple owners. The Constellation concept builds upon or serves to refocus already existing projects and activities. The Constellations effort provides a unique forum to achieve political visibility and increase mutual benefit among space and other environmental agencies in support of cross-cutting GEO Tasks and Targets.

The Ocean Colour Radiometry (OCR) constellation was approved by CEOS after the SIT-24 meeting in Darmstadt, Germany (Sept 2009). The Ocean Colour Radiometry - Virtual Constellation (OCR-VC) will provide long time series of calibrated ocean colour radiance (OCR) at key wavelength bands from measurements obtained from multiple satellites. OCR-VC activities will include calibration, validation, merging of satellite and in situ data, product generation, as well as development and demonstrations of new and improved applications. All IOCCG agencies serving on the IOCCG Committee (i.e., NASA, NOAA, ESA, EUMETSAT, EC/JRC, CNES, JAXA, KIOST, ISRO, INPE and CSA) support some aspect of this virtual constellation, and are taking a leadership role in the activities. Near-future plans of the OCR-VC include implementation of the INSITU-OCR (International Network for Sensor Inter-comparison and Uncertainty assessment for Ocean Colour Radiometry) and implementing linkages with relevant components of the GEO Blue Planet Task.


Philippe Escudier CNES, France
Ewa Kwiatkowska EUMETSAT
Martin Bergeron CSA Canada
Joo-Hyung Ryu KIOST, Korea
Milton Kampel INPE, Brazil
Mark Dowell JRC, European Commission
Hiroshi Murakami JAXA, Japan
Prakash Chauhan ISRO, India
Paula Bontempi NASA, USA
Craig Donlon ESA, Europe

Ad hoc members:

Stewart Bernard CSIR, South Africa
David Antoine LOV, France
Venetia Stuart IOCCG Project Office, Canada

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OCR-VC Documents
    Presentation, SIT-22 Meeting (Sept. 2008)
    Minutes Full Steering Group (April 2009)
    Presentation, SIT-24 Meeting (Sept. 2009)
    OCR-VC Implementation Plan (Sept. 2009)
    OCR-VC White Paper (OceanObs'09)
    Timeline for OCR-VC Implementation (Oct.2009)
    Terms of Reference for OCR-VC (Dec. 2013)
    OCR-VC presentation, IOCCG-19 meeting (Jan. 2014)
    OCR-VC Progress, CEOS SIT-29 Meeting (April 2014)
    OCR-VC Progress, CEOS SIT-30 Meeting (April 2015)

Cal/Val Workshop, JRC, 21 Oct 2010
    Workshop Agenda
    OCR-VC and INSITU-OCR - Mark Dowell
    GCOM-C Cal/Val - Hiroshi Murakami
    JRC Cal/Val - Giuseppe Zibordi
    MERIS Cal/Val - Philippe Goryl
    CoastColour approach - Carsten Brockmann
    EUMETSAT Ocean Colour - Anne O'Carroll
    GOCI Cal/Val - Joo-Hyung Ryu
    CNES calibration approaches - Bertrand Fougnie
    Cal/Val in Australia - Vittorio Brando
    Using SIMBADA - Robert Frouin
    NASA's sensors calibration - Gerhard Meister
    NOAA Contributions to OCR-VC - Chris Brown
    INSITU OCR-VC discussions - Mark Dowell

Workshop participants (click to enlarge)