1. GRWG Report and Briefing
Dohyeong Kim
GRWG Chair

2. Overview Membership and Chairing GRWG Activities Summary 2017/2018
GRWG Work Plan 2018/2019

3. GSICS Research Working Group
GRWG Chairing
Current nomination to GRWG (36 members):
5 CMA, 2 CNES, 4 EUMETSAT, 1 IMD, 1 ISRO, 3 JAXA, 3 JMA, 3 KMA, 4 NASA, 6 NOAA, 1 ROSHYDROMET, 2 USGS and 1 WMO
GSICS Research Working Group
Chair: Dohyeong Kim
Vice-Chair: Tim Hewison
Vice-Chair: Scott Hu
UV Sub-Group
Chair: Rose Munro
VIS/NIR Sub-Group
Chair: Dave Doelling
IR Sub-Group
Chair: Tim Hewison
Microwave Sub-Group
Chair: Ralph Ferraro

4. Overview Membership and Chairing GRWG Activities Summary 2017/2018
Actions and web meeting
Summary of activities
GRWG Work Plan 2018/2019

5. 2017 GRWG/GDWG Annual Meeting
Monday: Mini Conference + Agency Reports(Plenary)
Tuesday: Sub-Group Briefing Report
Wednesday: GRWG : UV Sub-Group + IR Sub-Group, MW Sub-Group, GDWG
Thursday: GRWG : VIS/NIR Sub-Group, GDWG
Friday: Briefing+Wrap-up(Plenary)

6. Annual meeting summary
10 Sessions and 121 Items were discussed
2017/2018 Actions
66 Actions generated
IR subgroup : 5 actions
VISNIR subgroup : 5 actions
MW subgroup : 8 actions
UV subgroup : 1 action

7. Actions on GRWG during 2017/18
Action Id
Summary
Lead
Due Date
Status
A.GWG e.1
GRWG to coordinate with B. Wielicki + Exec panel the writing of a white paper to support the CLARREO project
GRWG Chair
closed
(CGMS-45)
A.GWG j.1
Andy to discuss with GCC how to promote the PATMOS-x products through the GPPA.
NOAA(Andy)
Open
A.GWG c.1
CNES to report on progress with analysis of IASI moon observations at LCW
CNES(Bert)
A.GCC c.2
GCC to interact with EUMETSAT for IASI readers.
A.GWG i.1
EUMETSAT (P. Miu) to provide info to ISRO regarding the access to IASI data.
EUM(Peter)
A.GWG i.2
EUMETSAT (P. Miu) to investigate hosting ISRO GSICS products on the EUMETSAT GSICS collaboration server.
A.GWG i.3
NASA to support IMD with MODIS data. - Existing action - no new one needed?
A.GCC j.1
GCC and KMA to check the status of KMA’s products in the GPPA.
NOAA(Manik) and KMA(Hyesook)
A.GWG k.1
EUM to provide the degradation model for GOME-2 to NASA (Dave Doelling).
EUM(Rose)
A.GWG a.1
CMA(Scott) to confirm whether CMA can register for the new messaging service from China.
CMA(Scott)
A.GCC a.2
GCC to organise a web meeting before the User’s workshop.
A.GCC a.3
Each agency should indicate who should represent the users on their side. Manik to coordinate.
NOAA(Manik)

8. Actions on GRWG during 2017/18
Action Id
Summary
Lead
Due Date
Status
A.GWG c.1
GRWG Chair to check with EP if the ToR could be changed to address GRWG_15.1.
GRWG Chair
On-going
A.GWG o.1
Rob (EUMETSAT) to report back at the next annual meeting on the investigation to do an homogenisation in the radiance space (instead of in the spectral space with the SRFs).
EUM(Rob)
Open
A.GRWG c.1
Rose to investigate what tasks and tools are needed to pursue the work presented by Larry in the broader context of the UV Subgroup and in particular to identify resources needed with the aim of bringing this to the attention of the EP.
EUM(Rose)
A.GMW g.1
MW subgroup would contact NOAA GDWG to get support for product creation if needed.
Ralph Ferraro
A.GMW b.1
Provide an update on the status after launch (currently Sept 2017)
Ed Kim
A.GMW c.1
Determine feasibility of extracting the inter-calibration algorithms and coefficients from the FCDR and making them a GSICS product.
Karsten Fennig
A.GMW d.1
Cheng-Zhi Zou
A.GMW f.1
MW Subgroup chair to develop candidate satellite/sensor (inventory), perhaps in the form of a graphical aid, as in orbit references for specific channels (based on some predetermined set of parameters that Manik has outlined...) and note pros and cons, other attributes (publications, etc.)? It should include timelines of sensors and overlap periods.
A.GMW f.2
Tony Reale (NOAA) to provide a draft uncertainty analysis describing the comparison of example (microwave) instruments to GRUAN sondes.
Tony Reale

9. Actions on GRWG during 2017/18
Action Id
Summary
Lead
Due Date
Status
A.GMW g.1
MW co-chair to develop set of specific tasks to be performed by the Subgroup to intercompare RTM output over static references and surface models. Tasks to be identified within 6 months (Sep. 2017).
Ralph Ferraro
Open
A.GCC b.1
GCC to update the action tracking page in response to GRWG/GDWG proposal.
A.GCC c.1
GCC to survey from the GSICS users (e.g. during the GSICS User’s Workshop), which netCDF models they are using; classic or enhanced. If enhanced, what features they are using in this model; chunking, …?
A.GRWG c.1
JMA to report at the next annual meeting on their investigations regarding the diurnal variation in AHI by using GEO-GEO approach.
JMA(Hidehiko)
A.GRWG c.2
CMA is encouraged to investigate GEO-GEO comparison. In particular because FY-2 is spinning and therefore is not impacted by midnight anomaly. This exercise would help correcting for the SL issues.
CMA(Xu Na)
A.GRWG.2017.c.3
JMA to report at the next annual meeting on their uncertainty analysis in the gap filling method with AHI/AIRS.
JMA(Masaya)
A.GRWG.7cb.1
Aisheng (NASA) to get in touch with Chris Moeller to investigate the possibility to have a SRF shift and report back at the later stage (for both VIIRS and MODIS).
NASA(Aisheng)
A.GRWG d.1
Larry to check the status of the GOES sounder product (demo?)
NOAA(Larry)
A.GIR d.1
Tony Reale (NOAA) to provide a draft uncertainty analysis describing the comparison of example (IR) instruments to GRUAN sondes by the next annual meeting.
NOAA(Tony)

10. Actions on GRWG during 2017/18
Action Id
Summary
Lead
Due Date
Status
A.GIR d.2
Steve Broberg (JPL) to provide the theoretical uncertainties on the temperatures reported in slide 10 be split according to the scene temperature and the channels and consider updating the analysis accordingly.
JPL(Steve)
Open
A.GIR f.1
CMA to review the input needed for the error budget and request those information to the vendor.
CMA
A.GIR f.2
Fred Wu (NOAA) to explore the feasibility of retrieving SRFs using the method initiated by Manik Bali and report back.
NOAA(Fred Wu)
A.GVNIR f.1
Seb to contact ICWG via Andy to evaluate re-calibrated MSG reflectance data.
EUM(Seb)
A.GVNIR h.1
NOAA(Fred Wu) to solicit lunar images from the lunar calibration community to test evaluation of MTF.
NOAA(Fred)
A.GVNIR h.2
Tom will inform Arata of some publication.
USGS(Tom)
A.GVNIR ha.1
EUM(Seb) to arrange web meeting in April to finalise date and venue for lunar calibration workshop.
A.GVNIR u.1
NASA(Raj) to provide SBAF for each GEO imager based on VIIRS v2. Target date 30 May Web meetings Implementation of DCC mode method and writing journal paper by early 2018.
NASA(Raj)
A.GCC f.1
GCC to coordinate provision of GSICS Corrected test data from the 0.6µm and 11µm channels of all available GEO imagers during Dec 2009 to Ken Knapp to assess the impact of the corrections on ISCCP products.
A.GCC g.1
GCC to get the names of POC of agencies for pre-launch characterization workshop. In touch with CEOS.
A.GCC i.1
GCC to follow up with Andy Heidinger and Tim Hewison on to send a GSICS Rep to ITOVS and Users NWP Meetings, Cloud Working Group CGMS working groups.
A.GCC k.1
GCC to coordinate a preparatory web meeting on clarreo and send out invitations to members to attend the webmeeting.

11. Actions/Recommendations from CGMS
Description
Deadline/Actionee
Status
A45.05
GSICS to produce annual state of the observing system report to be delivered at CGMS
CGMS-46
OPEN
Report to CGMS-46 and GSICS-EP-19
R45.05
Calibration events logging task team be folded under GSICS as a task team
GSICS
Report as part of GSICS report
R45.06
Under the task team, agencies should assess the compliance of each agency with the new guidelines on events logging, and establish a list of instruments to be addressed by the calibration logging system
R44.26
Satellite operating agencies should support proposals and programs to acquire high-accuracy characterization measurements of the Moon, to develop a new, high accuracy, SI-traceable lunar reference standard for reflected solar wavelengths
CGMS space agencies
SWTT preparing a proposal on integrating some space weather products into GSICS (WGII/XX)
Proposed Working Paper in CGMS-46 : “Hyperspectral intercalibration and reprocessing” (SG session)

12. Actions from GSICS-EP-18
Action Id
Summary
Remarks
EP-18.01
to prepare specifications and methodologies for CGMS agency development of operational instrument performance monitoring systems
GRWG
EP-18.02
to assess the utilization RO for microwave instrument monitoring purposes
EP-18.03
to develop an approach for an Annual GSICS report on the State of the Observing System with Respect to Instrument Performance and Intercomparisons with GSICS Reference Instruments (from presentations given at the GRWG meeting)
GRWG+
GDWG
EP-18.04
to assess the value of GEO-to-GEO intercalibration for GSICS
EP-18.05
to develop GSICS Service Specification Document
+GCC

13. GSICS Web Meetings 2017/18 (12 times)
GRWG/GDWG
Planning 2018 Annual Meeting(2nd meeting)
GRWG MW Subgroup
Microwave Subgroup web meeting
GRWG IR Subgroup
Migration of IR Reference from IASI-A to -B + Alternative Regression (Tim Trent)
Planning 2018 Annual Meeting + SI-traceable Reference Workshop
/16
Joint GSICS/IVOS
Second Joint GSICS-IVOS Lunar Calibration Workshop - Xi'an, China
GDWG
Progress meeting on GDWG activities
Microwave sub-Group web meeting
Discussion on GSICS MW Products
Exec Panel de-briefing
IR Reference Traceability Report - Review progress - including draft error budgets
Microwave Sub-Group Web Meeting
Joint GSICS/IVOS - S. Wagner
Organisation of the Second Lunar Calibration Workshop - China 2017

14. Supporting CLARREO project
Action:
A.GWG e.1: GRWG to coordinate with B. Wielicki + Exec panel the writing of a white paper to support the CLARREO project
“The Need for On-Orbit SI-traceable Hyperspectral Reference Instruments for Satellite Inter-Calibration(GSICS)” presented to
GSICS-EP-18-Doc-7.1
CGMS-45 WG II/6 Selected topics of high priority to members
Update on CLARREO project provided by Tom Stone (10f)

15. Need for RAC and demo product for VIS/NIR
The use of FCDRs as inter-calibration references
Currently being pursued by SCOPE-CM, based on the time series from multiple HIRS instruments
Will be tied to IASI as an anchor reference(following the FIDUCEO project)
Agreed that RACs can support the generation of FCDRs
Decision : GSICS member agencies generating RACs are required to regenerate them for the entire record of each monitored instrument in event of a major version change in the processing algorithm
The topic of generating prototype/demonstration products for the VIS/NIR channels of GEO imagers
An important step to obtain feedback to guide further development
The current strategy for VIS/NIR products was on the right track
EP was requested to provide more resources within the member agencies to support the generation and distribution of demonstration products

16. Aid to Users Selection of GSICS Products
User need : Required accuracy or level of uncertainties, sensitivity of products to the calibration
Some of this information in the User Guides, accessible from the GSICS product Catalog
Need to standard the info provided to the users
Suggestion for format of user guide :
should include the information of sensor over whole operational time
The simple document including the description of dataset
Some information need to be detailed for climate application including near-real time use
Advantageous to provide basic information of the typical calibration biases of each instrument, derived from the GSICS Corrections, together with their variability and a statistical summary of the quality of the GSICS Corrections

17. Collaboration with ISCCP
GRWG
WGII/4
A44.05
GRWG to discuss with ISCCP (SCOPE-CM Project 9) a detailed project proposal for the use of GSICS methodologies to produce a GSICS-compliant ISCCP dataset for evaluation
CGMS-45
OPEN
5.1
(HLPP ref)
Review the history of ISCCP activities(phase I : ) and discuss collaboration between ISCCP and GSICS
Phase II will cover extended period ( , )
Cloud products uncertainties are limited by atmospheric correction rather than calibration
ISCCP calibration three stages(Nominal, Normal, Absolute (temporally stable))
VIS is based on vicarious terrestrial targets while IR based on the CDFs
ISCCP data cannot be used for temperature trends, but can trend some cloud products (e.g. cloudiness)
ISCCP could evaluate the impact of GSICS Corrections for GEO imagers on ISCCP cloud products, based on case studies
GPRC to provide tables that map IR (11µm) counts to radiance and/or TB
GPRC to produce/provide a table mapping VIS (0.6µm) counts to radiance/scaled radiance if possible
Updated tables for the month of Dec 2009 are the target (other months are also available)

18. Overview Membership and Chairing GRWG Activities Summary 2017/2018
GRWG Work Plan 2018/2019
Topics in the plenary

19. Challenges – Advanced next-gen GEO/LEO
9:25
Peng Zhang
CMA
Latest progress of CMA FY-3D and FY-4 satellite 1d
0:20
9:45
Lei Ding
SITP
Development of SI-traceable Hyperspectral FTIR instrument 1e
10:05
Qiang Guo
FY-4A calibration and validation 1f
10:25
John Fullbright
NOAA (Remote)
GOES-16 calibration and validation 1g
10:45
Xiuqing Hu
Post-launch test progress of FY-3D 1h
11:25
Cao Changyong
/Lin lin
NOAA/NOAA Affiliate
NOAA-20 Imager/Sounder SDR Maturity and Collaboration with FY3D through GSICS 1i
11:45
Feng Jiang
Solar band SI-traceable demonstration instrument 1j
New next gen GEO
FY-4A
GOES-16
NEW LEO
FY-3D
NOAA-20
SI traceable Hyperspectral FTIR
12:40
Qiang Guo,
Xuan Feng
CMA
Advanced next-gen GEO imagers/sounders - FY-4A 3i
0:20
13:00
Fred Wu
NOAA
Advanced next-gen GEO imagers - GOES-16 3j
13:20
Likun Wang
NOAA Affiliate
NOAA-20 CrIS calibration status and preliminary differences between SNPP and NOAA-20 CrIS 3k
10:40
Xuan Feng　
CMA
Early calibration results of FY-4A/GIIRS during in-orbit testing 4g
0:20
11:00
Hanlie Xu
GIIRS and HIRAS Hyperspectral instrument evaluation for FY-4A and FY-3D 4h
14:20
Hank Revercomb
SSEC
Calibration status of NOAA20 CrIS and intercalibration 4o
0:30

20. Challenges – GEO-ring GEO-GEO comparison GEO-ring database
GEO-GEO benefit and RGB composites
GEO-ring database
FIDUCEO update
address inter-calibration requirements and formats
14:10
Tim Hewison
EUMETSAT
GEO-GEO benefits and RGB Composites 3m
0:20
15:00
Rob Roebeling
EUMETSAT (Remote)
GEO-Ring database 3n
0:20
15:20
Viju John
FIDUCEO update 3o
15:40
Frank Ruethrich
Update on FIDUCEO to address inter-calibration requirements and formats 3p

21. Challenges - Expansion
References
GEO Sounders
SI-traceable Hyperspectral
CLARREO update
Pre-launch instrument characteristics
GCOS v2 with GSICS
11:45
Feng Jiang
SITP
Solar band SI-traceable demonstration instrument 1j
0:20
10:40
Xuan Feng　
CMA
Early calibration results of FY-4A/GIIRS during in-orbit testing 4g
0:20
10:20
Tom Stone
USGS
CLARREO update
10f
0:20
10:00
Xiuqing Hu,
Lei Ding
CMA
A potential workshop of best practices for pre-launch instrument characteristics
10e
0:20
09:30
Bruce Wielicki
NASA
Role of inter-calibration in the future climate monitoring system (GCOS v2)
10j
0:30

22. Actions from EP-18 on GRWG
Action Id
Summary
Remarks
EP-18.01
to prepare specifications and methodologies for CGMS agency development of operational instrument performance monitoring systems
10b
EP-18.02
to assess the utilization RO for microwave instrument monitoring purposes 9i
EP-18.03
to develop an approach for an Annual GSICS report on the State of the Observing System with Respect to Instrument Performance and Intercomparisons with GSICS Reference Instruments (from presentations given at the GRWG meeting)
10a
EP-18.04
to assess the value of GEO-to-GEO intercalibration for GSICS 3m
EP-18.05
to develop GSICS Service Specification Document

23. GRWG Chairing GRWG Chairing : three years (renewable) Nomination
By the time of GSICS-EP-19(June 2018), current GRWG Chair and Vice-Chairs have completed their 3 years of leading and chairing (GSICS ToR ref: GSICS-RD004-v2.0)
The GRWG chair is assisted by two vice-chairs, one being the former chair, and the other being the expected future chair.
The GRWG chair is designated for three years (renewable) with a primary role as defined in its ToR.
GRWG Chairing : three years (renewable)
Chair : Dohyeong Kim (KMA), (approved by EP-16) ~ (EP-19)
Vice-Chair : Tim Hewison (EUMETSAT), Scott Hu (CMA)
Nomination
NEW GRWG Chairing to be discussed on Friday (10l)
GRWG members are kindly requested to considering themselves for the GRWG chairing nominations

24. Thank you