1. GRWG Summary Decisions, Actions, Recommendations
09 April 2019
GRWG Summary Decisions, Actions, Recommendations

2. Mini Conference
Latest progress of CMA FY-3D and FY-4 satellite(Peng Zhang)
Development of SI-traceable Hyperspectral FTIR instrument(Lei Ding)
FY-4A satellite commissioning latest outcome(Qiang Guo)
GOES-16 calibration and validation(John Fullbright)
Post-launch test progress of FY-3D(Zhongdong Yang)
NOAA-20 Imager/Sounder SDR Maturity and Collaboration with FY3D through GSICS(Changyong Cao/Lin lin)
Solar band SI-traceable demonstration instrument(Feng Jiang)
Tansat/ACGS inflight calibration and validation(Yanmeng Bi/Zhongdong Yang)
TG-2 Multi-Angle Polarization Imager Calibration and evaluation(Dekui Yin/Yipeng Zhang)

3. Mini Conference
A.GWG g.1
Fred Wu to discuss with CMA potential sharing of GOES-R field campaign data for TANSAT validation
R.GWG k.1
CMA to consider performing comparisons of MERSI and TanSat/ACGS

4. Plenary(GPRC report)
FY4A : PST results and calibration of AGRI, GIIRS and LMI
GOES-16 : overview of cal/val plan
NOAA-20 : will be disseminated soon to the users.
FY-3D : on-going post-launch test of HIRAS, GAS
Solar band SI-traceable demonstration instrument

5. Plenary (WG report/Briefing)
A.GCC b.1
Manik Bali to set up web meeting to discuss requirements for sharing SNO predictions and/or tools.
A.GIR d.1
Likun Wang (NOAA) to coordinate routine comparisons of potential hyperspectral reference instruments (extended to include HIRAS) and report at annual meeting.
A.GIR j.1
Fangfang Yu (NOAA) and Masaya (JMA) to investigate radiance dependence of ABI 3.9 micron channel

6. GRWG (UV-sub group)
ground-based calibration of cutting-edge instruments under development
in-orbit calibration, validation and characterization of operational sensors
methods for comparing and monitoring long-term satellite records

7. GRWG (UV-sub group) A.GRWG.2018.6g.1
Munro to hold a UV Subgroup web meetings focused on a specific UV project topic during the coming six months
A.GRWG g.2
Flynn to provide information on the effect of dichroics on bandpass calculations
A.GRWG g.3
All members (UVSG Chair to coordinate) to find researchers interested in the four UV SG projects and invite them to future meetings as the agenda and their interests dictate.

8. GRWG (MW sub-group) (1/3)
Learned a lot about China’s MW sensors, operational and in development
Discussed potential best practices, focusing on more in depth activities leading the deliverables in the upcoming year
GPSRO as potential reference for certain O2 bands

9. GRWG (MW-sub group) (2/3)
A.GMW e.1
GSICS (C. Zou, Q. Lu?) and CEOS WGVC (Dong) to coordinate on best practice for MW Sensors and coordinate on the development of a MW ISO sensor document (similar to other wavelengths) lead by Dong’s group.   
A.GMW g.1
GPSRO focal points (Zou/Lin and Hu) to further evaluate their results for effects of cloud water and cloud ice and report back to the group within 6 months.
A.GMW k.1
In order to determine best practice for post-launch, Manik will survey existing satellite operator monitoring pages and present finding within 6 months.

10. GRWG (MW-sub group) (3/3)
A.GMW k.2
In order to move forward with a MW SNO best practice, a closer survey needs to be performed (e.g., IR group's GSICS product ATBD , what parameters were used for different MW bands, etc.). Action assigned - TBD
A.GMW k.3
To determine if the NOAA CDR (MSU/AMSU/ATMS) is a viable in-orbit reference, Zou and Bali will report back to the group after a forthcoming paper is published.
A.GMW l.1
Collect and document "best practices" to see if GMI can
serve as an in-orbit reference. (Ralph Ferraro and Wes Berg). 

11. GRWG (IR-sub group)-1/3 A.GIR.2018.4b.1
Masaya(JMA) to report de double differences with CrIS
A.GIR b.2
Xu Na(CMA) to prepare ATBD and other information to submit to GCC for the demonstration FY-2 products
A.GIR b.3
Manik(NOAA) To follow on distribution of the correction coefficients to GSICS
ISRO
A.2018.GIR.4c.1
JMA(Masaya)/CMA(Na) to work together on making GEO-GEO inter-comparison, using IASI
A.2018.GIR.4c.2
Yusuke Yog (JMA) To make comparisons between JMA SBAF and NASA SBAF tool

12. GRWG (IR-sub group)-2/3 A.GIR.2018.4d.1
Xu Na (CMA) and NOAA to compare with the NOAA and JMA gap filling methods. To report at the next Web meeting in 2-3 months
A.GIR d.2
Likun Wang (NOAA) to set up web meeting to discuss comparisons of gap-filling methods and plan way forward by June 2018
A.GIR d.3
Hui Xu to apply gap-filling method to IASI following to previous comment (two IASI data wt/wo gap)
A.GIR f.1
CMA to apply Likun Wang collocation method to LEO-LEO cases
A.GIR p.1
Tim Hewison to organise a web meeting on IRREFUTABLE in September

13. GRWG (IR-sub group)-3/3 A.GIR.2018.4r.1
Likun Wang (NOAA) will work with CNES and EUMETSAT to document the best practice of IR hyperspectral sounding processing
A.GIR t.1
Tim Hewison (EUMETSAT) to set up web meeting to review different GEO-LEO IR inter-calibration algorithm evolutions and invite Tim Trent to give update on results
Decision
CrIS accepted as reference

14. GRWG (VI/NIR-lunar calibration)
Key outcome from 2nd lunar workshop (2017)
Lunar model val using ground based hyperspectral measurement
Interband cal of MERSI-II new channels with lunar obs.
GIRO benchmark to validate GIRO against ROLO, and GIRO is recommended for instrument cal as it is
Alternative use of lunar observations to characterize MTF
A.GVNIR e.1
Tom Stone (USGS) to invite ESA to present progress on lunar calibration at the 2019 GRWG meeting and next lunar calibration workshop

15. GRWG (VI/NIR-sub-group)
Tansat/CAPI solar diffuser calibration process and result
FY-3D/MERSI-II calibration/validation
Calibration monitoring based on Tibet glaciers
New BRDF model in Dunhuang for vicarious calibration
status of T/A MODIS and VIIRS on NPP/JPSS-1 and the on-orbit performance of RSB
Update on the NASA-Langley SBAF tool
Rayleigh calibration as GSICS calibration method
MODIS to VIIRS as calibration reference for GSICS VIS/NIR group
CLARREO PATHFINDER GSICS requirements
DCC GSICS GEO calibration paper

16. GRWG (VI/NIR-sub-group)
A.GVNIR s.1
Bertrand to organize a web meeting before June 30 on the Rayleigh calibration
A.GVNIR u.1
Dave Doelling (NASA) to review KMA's implementation of the DCC method
A.GVNIR v.1
Dave Doelling (NASA) to set up web meeting by end April 2018 to select reference bands and calibration processing version for S-NPP/VIIRS reference dataset for inter-calibration
A.GVNIR v.2
Dave Doelling (NASA) to set up web meeting to plan journal paper on DCC method by end June 2018.
A.GVNIR v.3
Dave Doelling (NASA) to set up web meeting to discuss extension of DCC method to NIR by 28 Feb 2019

17. GRWG (VI/NIR-sub-group)
A.GVNIR v.4
Raj Bhatt (NASA) to generate DCC reference dataset from selected VIIRS data by 31 July 2018.
A.GVNIR v.5
Dave Doelling (NASA) to set up web meeting before 30 Sept 2018 to solicit inputs from all GPRCs on preferred sites to be characterised by CLARREO Pathfinder.

18. Plenary (cross cutting issue)
Mitch
Eric Shirley (NIST) should be the GSICS focal point and report back to us
Pre-launch characteristics
Tim to hold a planning web meeting for the workshop by September 2018
CLARREO like workshop
GRWG needs to define attributes to show stability of instrument in 1 page report template that will be used by satellite operators? Mitch needs by April 30 satellite operators for Vis and IR. JMA to provide the template.
GSICS-EP-18.03
(GRWG Chair) Each agency to provide to define minimum information for performance monitoring “specification and requirements” by 15 May 2018
GSICS-EP-18.01

19. CGMS-46 working paper Hyperspectral intercalibration and reprocessing
IASI, AIRS and CrIS data are all being reprocessed
This would imply some kind of intercomparison/cross-validation avtivities as these instruments are at the core of GSICS
GSICS would have to ensure that the quality of the data responds to our expectation

20. Thank you