1. EUMETSAT GPRC Report
Tim Hewison, Sebastien Wagner, Rob Roebeling, Peter Miu, Simon Elliot, Harald Rothfuss, Bartolomeo Viticchie
EUMETSAT

2. Overview Satellite Status
Status of outstanding GSICS actions on EUMETSAT
Calibration Support for MSG-3 Commissioning
Development of GSICS Products at EUMETSAT – summary only
GEO-LEO IR Products for current Meteosats using IASI
GEO Solar-band Channels for current Meteosats
Re-calibration of Meteosat archive data
Products development Time Line

3. EUMETSAT commitment to long term continuity...
YEAR... 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
METEOSAT FIRST GENERATION
METEOSAT-6
METEOSAT-7
METEOSAT SECOND GENERATION
METEOSAT-8
METEOSAT-9
METEOSAT-10
METEOSAT-11
Mandatory Programmes
METEOSAT THIRD GENERATION
MTG-l-1
MTG-S-1
MTG-l-2
MTG-l-3
MTG-S-2
MTG-l-4
EUMETSAT POLAR SYSTEM (EPS)
METOP-A
METOP-B
METOP-C
EPS SECOND GENERATION
OCEAN SURFACE TOPOGRAPHY MISSION
JASON-2
JASON-3
Optional and 3rd Party Programmes
JASON CONTINUITY OF SERVICES (CS)
THIRD-PARTY PROGRAMMES
GMES SENTINEL-3
GMES SENTINEL-4 ON MTG-S
GMES SENTINEL-5 ON EPS SECOND GENERATION

4. Operations – Satellites Status – March 2013
Operational status of the geostationary and LEO systems is stable:
Meteosat-7 provides Indian Ocean Data Coverage at 57.5° E
Meteosat-8 (MSG-1) is hot backup, located to 3.4° East
Meteosat-9 (MSG-2) provides Rapid Scanning Service at 9.5°E
Meteosat-10 (MSG-3) is Operational Prime, located at 0.0° East
Metop-A sun-synchronous at 09:30 - all instruments operational
Metop-B sun-synchronous at 09:30 (0:50 later) –commissioning
all instruments operational – although HIRS noisy
Jason 2 Low Earth Inclined Orbit System service for Near Real Time products has confirmed to be stable.

5. Meteosat Long-Term Planning PerspectiveJ F M A S O N D
3.4ºW 0º
9.5ºE
57.5ºE
63ºE
67.5ºE
2011
2012
2013
2014
2015
2016
2017
2018
MSG-3 Commissioning
MSG-4 Commissioning
Met-11 IOS (Duration TBD)
MTG-I1 Commissioning
Met-11 drift start
Met-10 drift start
MSG-3 Launch
MSG-4 Launch
MTG-I1 Launch
Met-9
Met-10 drift start
Met-9 drift start
Met-11
Met-11 drift stop
Met-10 drift stop
Met-8 at 3° inclination
Met-9
Met-8
Met-10
Met-9 RSS stop/Drift start
Met-10 drift stop/RSS start
Met-7
Met-8
Met-7
Met-8 takes over IODC (if agreed by Council)
Met-8 RSS stop/Drift start
Met-8 at 5° NS inclination
Met-9 drift stop/RSS start
Met-7 disposal
Slide: 5

6. Status of Outstanding Actions on EUMETSAT
Action Ref
Description
Assigned to
Due Date
State
GRWG05_08
Investigate the possibility to supply GEO data over desert sites to the SADE database
EUMETSAT
Mar 2011
late
GRWG05_40
EUMETSAT server needs update to the URL path from msg2-mviri-metopa-iasi-demo-rac to rac-msg2-mviri-metopa-iasi-demo
Jan 2012
Closed
GRWG06_18
Document the difference between IASI on Metop-A and IASI on Metop-B (Within one year after Metop-B launch)
CNES+EUMETSAT
Sept 2013
open
Joint07_10
Propose an event logging procedure including standard
EUMETSAT(Roebleing+Miu)
Mar 2013
Joint07_11
propose a web based interface for event logging for GSICS
GRWG07_04
Clarify the availability of SCIAMACHY data with ESA and KNMI and report back to GRWG
EUMETSAT(Roebeling)+WMO(Lafeuille)
Sept 2012
GRWG07_05
Enquire about lunar observations obtained with SCIAMACHY
EUMETSAT(Roebeling)
GRWG07_07
Investigate use of IASI observations for creating spectral band conversions for broad-band instruments and consider respective requirements; report back to GRWG
EUMETSAT (Hewison)
Dec 2012

7. Status of Outstanding Actions on EUMETSAT
Action Ref
Description
Assigned to
Due Date
State
GRWG06_16
Compile a list of existing activities concerning composite satellite imagery
All GPRC to EUMETSAT
01 Jun 2011
open
GRWG06_17
Find out time overlaps between geostationary satellites (commissing and operational periods), find out about the availability of such data and publish this information on GSICS wiki
All GPRCs
01 Dec 2011
JMA: None
EUM: None
Others: No response
Recommendation: Close Action – no interest!
The plot has not been on our Web site, as it was not running under the  current version.
With the coming Web-III (planned for QII this year) – using HTML-5 – the plot can be integrated, provided the needed special JAVA library is approved for integration by the GES IT Management.
Hopefully our WEB team in USC can clarify tomorrow with GES if this can be installed.
Updated on Instrument Information page of GSICS Wiki :
- Reported in GCC report

8. Support for Recent & Forthcoming Launches
Supported commissioning of Meteosat-10 (MSG3)
by running prototype inter-calibration wrt Metop-A/IASI
Validated potential variations to official SRF
Performed SEVIRI Solar Channel Calibration & analyzed
Monitor Metop-A/IASI and Metop-B/IASI
by double-differencing against Meteosat/SEVIRI – more on Day 3
also applicable to Metop-A/HIRS and Metop-B/HIRS – but not started
Starting planning inter-calibration activities for Sentinel-3
SLSTR – Sea and Land Surface Temperature Radiometer – final report
OLCI - Ocean and Land Colour Instrument

9. MSG-3 Commissioning Results – SSCC
MSG3  Launched on 5th of July 2012
Calibration of warm + cold channels started at the end of August:
Warm channels calibration = SEVIRI Solar Channel Calibration (vicarious calibration)
Cold channels = Blackbodies / inter-calibration with IASI (Metop-A)
14 calibration runs with SSCC (from end of August till mid-November)
Retrievals mean value
(Wm-2sr-1m-1/DC)
Retrieval standard deviation
VIS0.6
0.5216
0.0029
VIS0.8
0.4227
0.0023
NIR1.6
0.0881
0.0004
HRV
0.6628
0.0028
100  (CfMPEF – CfMean) / CfMean
VIS0.6
-0.52
VIS0.8
1.05
NIR1.6
0.40
HRV
-0.19
Relative difference in percent between the mean calibration coefficient slope and the slope provided to MPEF
Systematic biases w.r.t. pre-launch values (except for NIR1.6)
Biases = constant in time during the test period:
SSCC results  9% and 7% darker resp. for VIS0.6 and VIS0.8
SSCC results  16-17% brighter
Reasons for such biases not known yet.
SSCC error estimates on the retrievals = between 4 and 5% for all channels during the entire test period.

10. MSG-3 Commissioning Results – IR Inter-Cal v. IASI
IASI during MSG commissioning for 1st time
Rapid changes in IR13.4
Ice Contamination changes SRF
Fits same model as MSG2 for 0-3μm ice
Rate of change decreasing with age
Decontaminations: July, Sept & Dec 2012
Doesn’t return to zero bias afterwards
IR3.9 shows sinusoidal variation
Interference effects of thin film of ice ~λ
Apparent in other shortwave channels
Also seen in MSG2 long time series (4yr)

11. GSICS Products Development – GEO-LEO IR hyperspectral
GSICS Re-Analysis & Near-Real-Time Corrections for Meteosat9/SEVIRI-MetopA/IASI
Entered Pre-Operational status – January 2013
Met8 & Met10 now being implemented operationally
MetopB/IASI now being implemented operationally
Plan to inject alternative calibration coefficients -> L1.5 HDR
Delta Correction to migrate MetopB/IASI -> MetopA/IASI
In development – Presentation on Day 3 am
New tool for GSICS Bias Monitoring
Can now evaluate Tb bias for any scene radiance
Ready for Demonstration status?

12. GSICS Products Development – GEO-LEO IR broadband
In support of Reprocessing of Meteosat archive for FCDR
Re-calibration of WV & IR channels using HIRS
Meteosat/MVIRI-Metop/HIRS
Spectral Band Adjustment in development
Characterisation of calibration drift
LEO-LEO IR
MetopA/HIRS-MetopA/IASI
More reported on Day 3 pm

13. GSICS Products Development – DCC
Presentation on Thursday AM
Implementation still on-going
Decoupled processing of MODIS and SEVIRI to derive gains in place
Ray-matching to establish bias between MODIS and SEVIRI BT missing (BUT numbers provided by D. Doelling)
Spectral transformation of the data missing (BUT numbers for the spectral adjustment provided by D. Doelling)
Angular transformation of the data ( use of Hu ADM) in place but still to be validated
Uncertainty analysis to associate an uncertainty estimate to the derived gain missing
Future work:
Finalize implementation of the DCC ATBD
Validation against D. Doelling results
Generation of a GSICS product (demo) for MET-9
Generation of validation datasets for GSICS community
Integration of the algorithm in the monitoring processing chain (MET-8, 9 and 10)
Reprocessing of the past data:
MFGs (in particular MET-7)
MSGs (MET-8 and 9)

14. GSICS Products Development – Lunar Calibration
Presentation on Thursday PM
Since last meeting, further developments on the extraction procedure for the SEVIRI instruments
Achievements:
Development of an automatic extraction tool for lunar observations for LRES + HRVIS channels in both FD and RSS modes
Consolidation of the existing lunar observations database for MSG1, MSG2 and MSG3:
MSG1: end 2003 – 2009 (Full Disk + RSS) complete (part of the commissioning + all the operational data). Validation data still missing (1 year of data between May 2007 and May 2008).
MSG2: June 2012 complete.
MSG3: after 01/01/2013 complete.
Automatic saving of lunar observations after 01/01/2013 by the Image Processing Facility.
Full range of phase angles covered
Collaboration with USGS  inter-band calibration using the ROLO model as a reference (~1% relative error)
Results to be used only for inter-band calibration and drift monitoring
Lunar calibration method and instrument are stable. SD <1% - consistent with expected performance of ROLO  BUT is it affected by seasonality?
Relative difference between channels = consistent with current findings in terms of absolute calibration.
MSG1
Future work:
Assessment of lunar calibration capacities with HRV & MFG/MVIRI sensor
Understanding of the observed biases between ROLO and MSG/SEVIRI

15. EUMETSAT’s GSICS Product Development Plan
GEO-LEO IR
DRAFT

16. Old Slides beyond this point – Proceed this caution!
Thank you!
Old Slides beyond this point – Proceed this caution!

17. Summary of planned Launches – out of date!
: Metop-B
MSG-3
2013: GMES Sentinel 3 A (ESA)
2014: Jason 3
2015: MSG-4
: Metop-C
2017: GMES Sentinel 3B (ESA)
2018: 1st MTG-I
2017: 1st Jason CS (after Jason 3)
2019: 1st MTG-S (with GMES Sentinel 4 Instrument)
2019: 1st EPS-SG Satellite ready for launch (VII, IRS, MWS, S5, etc)
2021: 2nd EPS-SG Satellite mission ready for launch (ASCAT, MWI)
2022: 2nd MTG-I
PRD: Preliminary Design Review
Multimission elements: Archive, EUMETCast, etc.

18. Overview Satellite Status
GEO-LEO IR Products for current Meteosats using IASI
GEO Solar-band Channels for current Meteosats
Re-calibration of Meteosat archive data
Other

19. Meteosat Solar Band Calibration Activities
Vicarious calibration using desert targets + sea targets (current official calibration)
 SEVIRI Solar Channel Calibration System (presented in Daejeon, 2011)
Lunar Calibration
 Collaboration with USGS
METEOSAT imagers
MVIRI (Meteosat First Generation)
SEVIRI (Meteosat Second Generation)
FCI (Meteosat Third Generation)
Inter-calibration with MODIS using Deep Convective Clouds
 Implementation of the GSICS ATBD (Doelling, 2011)
Preparation to MSG3 launch + reprocessing activities

20. Overview Satellite Status
GEO-LEO IR Products for current Meteosats using IASI
GEO Solar-band Channels for current Meteosats
Re-calibration of Meteosat archive data
Other

21. HIRS Data – Objectives Prerequisites and Benefits
To recalibrate time-series Meteosat First Generation and Meteosat Second Generation infrared radiances from 1982 till date using a superior instrument as reference.
Prerequisites:
Inter-calibration back to 1982
Target accuracy over the time-series better than 1 K
Inter-calibration with uncertainty estimate
Method
Select reference instrument
Assess the uncertainties through systematic review of spectral conversion functions
Define the inter-calibration approach
Reprocess and validate the Data processing and verification
Instrument drift is SRF shifts & sensor degradation

22. METEOSAT 1984-2005 Archive evaluation using radiosondes
Upgrade of calibration technique
(van de Berg, et al., 95)
Upgrade of calibration technique
(Schmetz, 1989)
ISCCP DX Normalized Instead of nominal
Comparisons between the METEOSAT BTs and the simulated BTs from radoisoundings: (+) represent the raw data, (◊) represent the homogeneised data. The histogram shows the nb of soundings used for comparison.
Can we do better than that and extend to SEVIRI?
Courtesy of Helene Brogniez and Rémy Roca, LMD

23. Traditional inter-calibration approach
Slide: 26

24. Proposed GSICS inter-calibration approach
Delta Correction to transfer from one reference to another
Defined as differences between inter-calibration functions
Defined in channel-space of monitored instrument
No need for direct comparisons of references
More explanation needed
Delta
Slide: 27 27

25. Proposed GSICS inter-calibration approach
Delta time steps inserted for illustration only
In practice, deltas defined from simultaneous double-differences
Make lines transparent
Delta
Slide: 28 28

26. Overview Satellite Status
GEO-LEO IR Products for current Meteosats using IASI
GEO Solar-band Channels for current Meteosats
Re-calibration of Meteosat archive data
Other

27. Update on Actions
GRWG06_17: Find out time overlaps between geostationary satellites (commissioning and operational periods), find out about the availability of such data and publish this information on the GSICIS Wiki EUMETSAT have generated an Excel file, presenting on a daily basis the availability of the Meteosat satellite data in COM or OPE mode from the Data Centre. It includes a rudimentary chart, which we plan to improve in the future ,e.g. provide on web site, add zooming capability, select / deselect