Workshop on "Ocean Colour System Vicarious Calibration for Science and Operational Missions" 2-3 December, 2013, ESRIN, Italy Chaired by Ewa Kwiatkowska Welcome - Ewa Kwiatkowska Session 1: Current status VIS vcal site and source characterization, uncertainties MOBY (Ken Voss) BOUSSOLE (David Antoine) Vical application in ocean colour processing (NIR and VIS vcal, sites, sources, protocols, implementation in the processing chain) NASA (Bryan Franz) KOSC/KIOST (Seongick Cho) ISRO (Ashok Shukla) ESA (Constant Mazeran) Remaining uncertainties Analysis of current biases among missions (Fred Melin) Impact of instrument calibration and instrument characterization, pre-launch and on-orbit (Gerhard Meister) Results from other statistical techniques (Bertrand Fougnie) Session 2: NIR methodology and recommendations towards standardization NIR vcal methodology: black pixel assumption, atmospheric model, aerosol spectral slope, band assumptions (Jean-Paul Huot) SWIR vcal (Menghua Wang ) Role of aerosol measurements (Ewa Kwiatkowska) Session 3: VIS methodology and recommendations towards standardization Vcal requirements for OCR-VC, standardization, data policy (Menghua Wang) VIS vcal requirements on in situ data sources, site requirements, site selection, data quality (Giuseppe Zibordi) Vcal regional specifics (Seongick Cho ) Session 4: Operational mission needs Vcal requirements for operational services, how to achieve operational status early (Ewa Kwiatkowska) NIR vcal approach early in the mission: sites, data quality, targeted satellite acquisitions (Jean-Paul Huot) VIS vcal approach early in the mission: sites, data quality, targeted satellite acquisitions (Menghua Wang) Session 5: Advancing as a community: vision for the future of vicarious calibration and international cooperation Funding and upgrading of existing vcal infrastructure (Ken Voss) Vision for the future of vcal, concepts for instrumentation, infrastructure, site locations (David Antoine) International cooperation, coordination, and data sharing (Seongick Cho, Ashok Shukla, Menghua Wang, Bryan Franz, Philippe)