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Advancing Ocean Color Radiometry: INSITU-OCR Initiative for Climate Variable Accuracy

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seamus
12 diapositives · 269 Views · Jul 21, 2014

The INSITU-OCR initiative aims to enhance the accuracy and consistency of essential climate variables derived from satellite ocean color missions. Starting in January 2010, this joint CEOS/IOCCG initiative has fostered collaboration among international organizations to develop best practices for sensor intercomparisons and uncertainty assessment. Through workshops, discussions, and community engagement, over 30 recommendations have been established to improve radiometric calibration, satellite product assessment, and in situ data handling. The initiative promotes open access to data and fosters ongoing improvements in ocean color science.

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Advancing Ocean Color Radiometry: INSITU-OCR Initiative for Climate Variable Accuracy
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  1. International Network for Sensor InTercomparison and Uncertainty assessment for Ocean ColourRadiometry (INSITU-OCR) working toward high accuracy and consistency of essential climate variables from multiple satellite ocean color missions …a joint CEOS/IOCCGinitiative…

  2. INSITU-OCR evolution • January 2010 • Proposal for an international SIMBIOS-like activity at IOCCG#15 • April 2010 • Meetings at Oceans from Space conference in Venice: • Town Hall meeting on OCR-VC • Dedicated side–session on INSITU-OCR • October 2010 • OCR workshop in conjunction with WGCV-IVOS conferenceat JRC • INSITU-OCR was introduced to space agency principals in the CEOS plenary in Rio, Brazil • February 2011 • Discussion continued at IOCCG#16 • March 2011 • …and at CEOS SIT – Tokyo • November 2011 • Working group formed • February 2012 • Workshop held at Goddard • Today • You get to listen to me…

  3. Whatisit, really? • Blend IOCCG plans with OCR workshop and WGCV-IVOS workshop recommendations • Review of current “best practices” • Discussion of gap-analysis for INSITU-OCR/CalVal • Cooperate to the next WGCV/IVOS comparisons (OCR) • Goal – a community white-paper on requirements for inter-agency initiative on INSITU-OCR • Harmonize existing OCR programs and identify gaps of networking as per schematic • Integrating and rationalizing inter-agency efforts for: • satellite sensor inter-comparisons • uncertainty assessment for remote sensing products • emphasis on requirements for the generation of Ocean Color Radiometry Essential Climate Variables (ECV) • A prioritized effort of the CEOS Ocean Color Radiometry Virtual Constellation (OCR-VC) • Core office – good idea?

  4. Working group participants Agency Representatives • EC/JRC – Giuseppe Zibordi(co-lead) • NASA – Sean Bailey (co-lead) • IOCCG – David Antoine • ESA – Philippe Goryl • CNES –Bertrand  Fougnie • NOAA – Menghua Wang • NASA – Bryan Franz • NIST – Carol Johnson • JAXA – Hiroshi Murakami • EUMETSAT – EwaKwiatkowska • KORDI – Yu-Hwan Ahn • ISRO – PrakashChauhan

  5. There was a meeting…

  6. …we worked really hard…

  7. …and came up with some recommendations • Primarily addressed to the Space Agencies contributing to the Ocean Color Radiometer – Virtual Constellation (OCR-VC) • Over 30 recommendations under 4 categories: • space sensor radiometric calibration, characterization and temporal stability • development and assessment of satellite products • in situ data generation and handling • information management and support

  8. Calibration, characterization and temporal stability • Pre-launch calibration and characterization data • Comprehensive • Open access • Permanent working group on space sensors calibration • Vicarious Calibration • Support for calibration teams • Assess and correct for instrument degradation • Inter-comparisons from pre-launch through operations

  9. Development and assessment of satellite products • Distribution of un-calibrated data • Common algorithms / open access to source code for processing algorithms • Development of regional bio-optical algorithms • Working group on algorithms topic • Require uncertainties for bio-optical algorithms • Support long term-measurement programs • Develop/maintain validation protocols • Generate Level-3 data products • Consistent set of ancillary data sources • Common aerosol models

  10. Insitudatagenerationandhandling • Improving traceability of in situ measurements • Continuous consolidation and update of measurement protocols • Centralized open access data repositories should be established • Uncertainty budgets • Quality Assurance of in situ data • Priority for variables to be collected • General coordination of field campaign

  11. Information management and support • Accessibility to data/ distribution of large data volumes • Accessibility to documentation • Common data format for the storage of the satellite data • Support for open source data processing and visualization • Community processor for in situ data

  12. The white paper • First draft went out for comment from the working group participants on March 15, 2012 • Comments currently being incorporated • Anticipated delivery by the end of May 2012