1. World Meteorological Organization Working together in weather, climate and water WMO OMM WMO www.wmo.int/sat Considerations on calibration and the role of GSICS in the Architecture for Climate Monitoring from Space CGMS-43, WMO-WP-06, item G.2 Ken Holmlund (Vice-Chair GSICS-EP) Peng Zhang (Chair, GSICS-EP) Jérôme Lafeuille (WMO)

2. Four Pillars of end-to-end Architecture The sensing level (Pillar 1) drives the potential to generate ECVs The climate record creation (Pillar 2) is the actual use of this potential The ECV inventory addresses Pillar 2 => helps maximize the use of data Calibration activities must be addressed in both Pillars 1 and 2 : 1)Space segment (pre-launch and on-board calibration, space/ground references) 2)Applying inter-calibration corrections, re-calibration of archived data CGMS-43, Boulder May 2015

3. Tentative elements of the «first pillar» Coordinated planning involving the whole community Define a Baseline satisfying the climate requirements, including missions and minimum sensor specifications driving the performance to support FCDR (spectral, FoV, coverage) Monitoring agencies’ plans to implement the baseline Forward-looking gap analysis to detect potential gaps at the planning phase rather than a posteriori in the ECV records, for risk reduction measures Implementation principles (best practices) for every satellite programme Comparability of missions for seamless continuity to support FCDRs Measurement consistency through calibration & traceability CGMS-43, Boulder May 2015

4. How should calibration be addressed in the Architecture? Calibration infrastructure to be implemented and shared a)In-orbit references for traceability b)Ground-based calibration sites c)Databases and software tools Calibration processes to be addressed by operators a)Best practices for pre-launch calibration b)Procedures for in-orbit calibration with uncertainty estimation c)Procedures for in-orbit comparison and inter-calibration d)Procedures for vicarious calibration with ground targets e)Algorithms/tools for re-calibration of archived data f)Communication and capacity building (incl. QA4EO)  These activities are conducted by GSICS together with CEOS/WGCV CGMS-43, Boulder May 2015

5. Strategy towards an Architecture for Climate Monitoring from Space CGMS-43, Boulder May 2015 Corrected calibration Data acquisition (Level 0) Data sets and tools Intercalibration procedures Observations Environment Operational calibration (Level 1) Intercalibration information Calibration references

6. Proposed action to address the calibration function in the architecture for climate monitoring from space GSICS to work with CEOS/WGCV to: – Describe the processes to be followed to ensure consistent calibration meeting climate requirements – Describe the required infrastructure (space-based and surface-based) supporting these processes – Review the analysis of calibration-related tasks in the logical analysis of the Architecture … with a view to provide a joint input to the Architecture for Climate Monitoring from Space CGMS-43, Boulder May 2015

7. Thank you CGMS-43, Boulder May 2015

8. WMO OMM Architecture for Climate Monitoring from Space Requested by WMO Congress-16 (2011) Res. 19 (http://www.wmo.int/pages/prog/sat/documents/SAT-GEN_ST-13-Climate-space- monitoring-architecture-Res19-Cg16.pdf ) as an important component of WIGOS (http://www.wmo.int/pages/prog/sat/documents/SAT-GEN_ST-13-Climate-space- monitoring-architecture-Res19-Cg16.pdf The Strategy towards an Architecture for Climate Monitoring from Space is a first step defining a logical framework GSICS-EP-16, Boulder, 15-16 May 2015 Strategy towards an Architecture for Climate Monitoring from Space CEOS, CGMS, WMO