1. CEOS SST-VC- Status and Issues Craig Donlon and Kenneth S. Casey on behalf of the SST-VC members ESA and NOAA CEOS SIT-29 Meeting CNES, Toulouse, France 9 th -10 th April 2014

2. SIT-29 Meeting CNES, Toulouse, France 9 th -10 th April 2014 GPM/GMI

3. SIT-29 Meeting CNES, Toulouse, France 9 th -10 th April 2014 SST-VC Status and Issues Relatively healthy space segment but: Currently no dual-view IR SST reference capability Future of passive microwave SST capability is not secure Ground-based Fiducial Reference Measurements (FRM) remain a challenge International collaboration remains strong within the framework of GHRSST and the CEOS SST-VC SST-VC requests participation from CEOS member states having an SST capability (ISRO, CONAE, NRSCC, NSMC/CMA, Roskomos, KARI and others). Collaboration with WGCV, WG-Climate and WGISS proceeds well SST-VC will meet during the Group for High Resolution SST (GHRSST) Annual Science Team Meeting, Cape Town, South Africa June 2-6 th 2014. Sponsored by SANSA, ESA and EUMETSAT.

4. SIT-29 Meeting CNES, Toulouse, France 9 th -10 th April 2014 For Information: BluePlanet: “to raise public awareness of the role of the oceans in the Earth system” Various CEOS member projects to address this issue building on SST data sets (e.g. weather forecasting, seasonal forecasting, climate prediction and monitoring, Coral Reef Bleaching, air-sea gas exchange…) SST-VC will remain ready to participate and support BluePlanet with data and various data-driven SST infrastructure. Better coordination is required across the CEOS VC’s

5. SIT-29 Meeting CNES, Toulouse, France 9 th -10 th April 2014 For Information: VC-1 is maintained using the GHRSST Regional/Global Task Sharing (R/GTS) Framework documented within a master metadata repository (Lead: NASA/NOAA) VC-17: White paper is in draft form and will be consolidated by 2015. It will take a justified requirements-based approach (as was done for the The CEOS Next 15 Years of Satellite Altimetry document) Lead: ESA

6. SIT-29 Meeting CNES, Toulouse, France 9 th -10 th April 2014 For Information: Lead: NOAA/NODC

7. SIT-29 Meeting CNES, Toulouse, France 9 th -10 th April 2014 For Information: Requirements fed to WGCV. ESA provides funding to coordinate project

8. SIT-29 Meeting CNES, Toulouse, France 9 th -10 th April 2014 SST-VC: SST ship borne radiometer Inter-comparison requirements Aim: Establish and maintain S.I. traceability for ship borne radiometers used as Fiducial Reference Measurements (FRM) for Satellite SST validation. REQ-1: Define and document the exact methodology used to measure SST skin for each FRM ship borne radiometer. REQ-2: Define laboratory calibration and verification methodologies and procedures (radiometry and for reference blackbodies) that are applicable to FRM ship-borne radiometers. REQ-3: Maintain pre-deployment and post-deployment calibration verification of FRM ship borne radiometer following the defined methodology and procedures set out under REQ-2.

9. SIT-29 Meeting CNES, Toulouse, France 9 th -10 th April 2014 REQ-4: Establish and maintain uncertainty budgets (determined in agreement with defined National Standards Laboratory protocols) for FRM ship-borne radiometer data. REQ-5: Improve the traceability of FRM ship borne calibration and verification measurements via regular inter-comparison exercises (including radiometer and reference blackbody laboratory work, validation of processing software and, dedicated field experiments). REQ-6: Maintain and provide access to all relevant calibration and validation documentation published in a format that is freely and openly available to users of the data. REQ-7: Archive FRM ship borne radiometer calibration and verification data following good data stewardship practices providing access to records by research teams on request. REQ-8: Maintain calibration and verification procedures based on “lessons learned”, peer review literature best practices. SST-VC: SST ship borne radiometer Inter-comparison requirements

10. SIT-29 Meeting CNES, Toulouse, France 9 th -10 th April 2014 Aim: Establish and maintain S.I. traceability for infrastructure providing Fiducial Reference Measurements (FRM) for Satellite SST calibration and validation. REQ-1: Define an approach and methodology to establish, as far as possible, a means to trace drifting buoy, ARGO and other in situ SST measurements to S.I standards accurate to 0.05K or better and of known stability (including time and space definition e.g. stable to K per over km on ). REQ-2: Maintain pre-deployment (and if possible) post-deployment calibration verification of drifting buoy, ARGO and other in situ SST measurements following the defined methodology and procedures set out under REQ-1. REQ-3: Establish and maintain uncertainty budgets (determined in agreement with defined National Standards Laboratory protocols) for drifting buoy, ARGO and other in situ SST measurements data. SST-VC: SST calibration and validation requirements for other SST infrastructure

11. SIT-29 Meeting CNES, Toulouse, France 9 th -10 th April 2014 REQ-4: Improve the traceability of drifting buoy, ARGO and other in situ SST measurement calibration and verification via regular inter-comparison exercises (including laboratory work, validation of processing software and, dedicated field experiments). REQ-5: Maintain and provide access to all relevant calibration and validation documentation published in a format that is freely and openly available to users of the data. REQ-6: Archive drifting buoy, ARGO and other in situ SST measurement calibration and verification data following good data stewardship practices providing access to records by research teams on request. REQ-7: Maintain calibration and verification procedures based on “lessons learned”, peer review literature best practices. SST-VC: SST calibration and validation requirements for other SST infrastructure