World Meteorological Organization
WMO OMM
Working together in weather, climate and water
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)
WMO
www.wmo.int/sat
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)
2)
Space segment (pre-launch and on-board calibration, space/ground references)
Applying inter-calibration corrections, re-calibration of archived data
CGMS-43, Boulder May 2015
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
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
Strategy towards an Architecture for Climate Monitoring from Space
Environment
Calibration
references
Intercalibration
information
Intercalibration
procedures
Data sets
and tools
Data
acquisition
(Level 0)
Corrected
calibration
Operational
calibration
(Level 1)
Observations
CGMS-43, Boulder May 2015
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
Thank you
CGMS-43, Boulder May 2015
Architecture for Climate Monitoring from Space
WMO OMM
•
Requested by WMO Congress-16 (2011) Res. 19
(http://www.wmo.int/pages/prog/sat/documents/SAT-GEN_ST-13-Climate-spacemonitoring-architecture-Res19-Cg16.pdf )
as an important component of WIGOS
•
The Strategy towards an Architecture for
Climate Monitoring from Space is a first
step defining a logical framework
Strategy towards an
Architecture
for Climate Monitoring
from Space
CEOS, CGMS, WMO
GSICS-EP-16, Boulder, 15-16 May 2015