1. Special Issue of the IEEE TGRS on “Inter-Calibration of Satellite Instruments”:
01 January 2019
Report of GRWG: Aims of meeting Review of Actions Proposal for Re-structuring
Tim Hewison

2. GRWG Achievements 2012/2013

3. GRWG Achievements 2012/2013 GSICS Corrections for GEO-LEO IR
now Pre-Operational for EUMETSAT & NOAA
Nearly pre-operational for JMA
Reported by GCC
Progress on GEO-LEO VIS:
DCC – Thurs am session
Lunar & other methods – Thurs pm session
Special Issue – Reported separately

4. Top-Level Aims for WG Meeting
Focus on GSICS Products!
Documentation
Release Roadmap
Development of New Products

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

6. Top Level Meeting Aims – for All #1
Web Meetings, Joint Working Group Meeting & Users' Workshops
Top Level Meeting Aims – for All #1
GSICS Products in General:
Documentation
Handling Multiple References
Roadmap for Release of Operational Products
GSICS Data and Products Servers:
Format for Intermediate Datasets
GSICS Bias Monitoring:
Enhancements for web plotting tool
Instrument Event Logs:
Consolidated Approach from all GPRCs

7. Top Level Meeting Aims – for All #2
Web Meetings, Joint Working Group Meeting & Users' Workshops
Top Level Meeting Aims – for All #2
Interaction with other Activities:
MICROS
GPM XCAL – GPPA?
IVOS
ROLO
And potential users:
SCOPE-CM
GHRSST
ISCCP

8. Top Level Aims – for GRWG #1
Web Meetings, Joint Working Group Meeting & Users' Workshops
Top Level Aims – for GRWG #1
Reflected-Solar Band:
Review of ATBDs
Roadmap to prototype GSICS Products – when/who…?
Reference – MODIS traceability & migration to VIIRS?
Strategy for LEO-LEO GSICS products
Statement on USGS setting up ROLO facility for GSICS
Re-Analysis Products:
Review of issues
General strategy – e.g. Reprocessing, versions

9. Top Level Aims – for GRWG #2
Web Meetings, Joint Working Group Meeting & Users' Workshops
Top Level Aims – for GRWG #2
Infrared:
Strategy for LEO-LEO GSICS Products
Delta Corrections for Multiple references:
Metop-A/IASI to Metop-B/IASI migration
Handling midnight calibration issue with AIRS+IASI
How to decide which is the reference instrument?
Using NWP as inter-calibration tool
Review of issues
Improve Efficiency!
Re-structure GRWG

10. Outstanding Actions on GRWG
Action Ref
Description
Assigned to
Due Date
State
GRWG05_04/05
Review error propagation example and consider how it could apply their solar channel calibration method
GRWG (Solar Pis)
Mar 2011
open
GRWG05_38
The GRWG is required to inform the GDWG on what GSICS products are required to be archived.
GRWG Chair (Hewison)
Jan 2012
Open
Joint06_04
Coordinate a special journal issue on solar calibration with the co-editor of the Canadian Journal of Remote Sensing (G. Chander)
USGS(Chander)+EUMETSAT (Hewison)
Dec 2011
Closed
GRWG06_04
Outline ATBD for the sun-glint method
NOAA (Heidinger)
GRWG06_08
Outline ATBD for the desert method
CNES
Jun 2011
GRWG06_16
Compile a list of existing activities concerning composite satellite imagery
All GPRC to EUMETSAT
01 Jun 2011
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

11. Outstanding Actions on GRWG
Action Ref
Description
Assigned to
Due Date
State
GRWG06_25
Improved characterisation of desert sites, provide information on progress to GRWG (Update: on-going effort)
GRWG(Doelling+Wu+Xiong+Chander
Jun 2011
open
Joint07_3R
GRHSST is invited to review one or more of the current GSICS GEO IR product and to provide feedback to GRWG
NOAA (Liang)
Mar 2013
Joint07_08
Provide a progress report on the WGCV focus on desert sites and Rayleigh scattering, preferably by a web meeting in 2012
CNES(Fougnie)
Dec 2012
GRWG07_02
Outline ATBD for Rayleigh Scattering
CNES
GRWG07_03
Extract the tropical DCCs from the MODIS archive and make that data available to all GPRCs, data issues to be discussed with GDWG
NASA(Doelling)+GDWGChair(Jelenak)
Sept 2012
GRWG07_08
X. Liang to present the NWP bias monitoring for ATSR & MODIS in 2013 GRWG meeting
GRWG07_09
Invite A. Heidinger to give a presentation on the possibility to use the AVHRR Patmos-X dataset to support archive recalibration
GRWG(Hewison)
closed

12. Outstanding Actions on GRWG
Action Ref
Description
Assigned to
Due Date
State
GRWG06_25
Improved characterisation of desert sites, provide information on progress to GRWG (Update: on-going effort)
GRWG(Doelling+Wu+Xiong+Chander
Jun 2011
open
Joint07_3R
GRHSST is invited to review one or more of the current GSICS GEO IR product and to provide feedback to GRWG
NOAA (Liang)
Mar 2013
Joint07_08
Provide a progress report on the WGCV focus on desert sites and Rayleigh scattering, preferably by a web meeting in 2012
CNES(Fougnie)
Dec 2012
GRWG07_02
Outline ATBD for Rayleigh Scattering
CNES
GRWG07_03
Extract the tropical DCCs from the MODIS archive and make that data available to all GPRCs, data issues to be discussed with GDWG
NASA(Doelling)+GDWGChair(Jelenak)
Sept 2012
GRWG07_08
X. Liang to present the NWP bias monitoring for ATSR & MODIS in 2013 GRWG meeting
GRWG07_09
Invite A. Heidinger to give a presentation on the possibility to use the AVHRR Patmos-X dataset to support archive recalibration
GRWG(Hewison)
closed
We have a PATMOS-x dataset at NCDC that spans from 1981 to 2012 and this includes our solar reflectance calibrated observations.  I do think this might be useful in geo/leo calibration studies.  Maybe PATMOS-x could serve as a relative calibration check of geo imagers in the pre-EOS era.  I am happy to try this. Will discuss at Users Workshop PATMOS-x will be recalibrated later this year once the MODIS C6 Level-1b data are available for the whole MODIS record.

13. GSICS Web Meetings 2012/13 Date Group Topics 2013-03-04/08 GRWG/GDWG
Annual GRWG+GDWG Meeting in Williamsburg, USA ??
GRWG+GDWG - F. Yu
Preparation for 2013 Users’ Workshop
GRWG/GDWG - T.Hewison/ A.Jelenak
Preparation for 2013 GDWG & GRWG Meeting
GRWG - T. Hewison
The Moon and More Desert Targets
GRWG
Desert Targets - Outcome of Libya 4 workshop
GRWG/GDWG - D. Doelling
Follow-up on DCC method, including new MODIS data availability
GRWG/GDWG - R. Roebeling/A. Jelenak
Update on the Instrument Event Log
postponed
Resolving the differences between NWP and GSICS bias monitoring
Users Workshop
2012 Users' Workshop
GRWG/GDWG - T. Hewison
Preparation for 2012 Users’ Workshop
Inter-Calibration of AVHRR and GHRSST-GSICS Interaction
GDWG - A. Jelenak
Data Servers, Formats and Datacasting
GRWG/GDWG - F. Weng
Absolute calibration for Microwave channels
GRWG/GDWG - F. Yu
Updates on the GSICS Procedure for Product Acceptance

14. GRWG Re-structuring - Motivation
Following our initial success with GEO-LEO infrared and users’ demand for further inter-calibration products,
GSICS is aiming to expand to cover other instruments and other parts of the spectrum.
This requires the development of multiple techniques appropriate for different spectral bands.
It is difficult for one person to keep abreast of all the developments in each of these areas, let alone guide the development of future products.

15. GRWG Re-structuring – Sub-groups
GRWG chair shall continue to rotate with 3-year tenures with optional renewals,
the chairmanship being selected by the Chair of the Executive Panel,
upon recommendation from members of the GRWG.
The GRWG should define one or more sub-groups
And define a chair for each, seeking consensus agreement
Sub-group chairs shall be selected with complementary fields of expertise
to take clearly defined roles
to lead the development of inter-calibration products
for specific classes of instruments and/or applications.
Sub-group chairs shall be responsible for
organising and chairing portions of the agenda of
the annual GRWG meeting as well as web meetings related to their topic,
Monitoring actions related to the development of inter-calibration products in their field.
Reporting progress to Exec Panel & Users’ Workshops
could continue to be done through the GRWG chair,
or by deputy chairs as available.

16. Defining GRWG Sub-groups/Chairs
Microwave
Already formed, but inactive
Chair?
Reflected Solar Band
Infrared?
Hyperspectral IR?
Archive Re-Calibration?
Other? Or
GEO-LEO, LEO-LEO, etc…?
Do we need to include GDWG in sub-groups?
Membership of sub-groups not mutually exclusive!