Teleconference 18 and 19.5.2022

Task Team on Table Driven Code Forms (TT-TDCF)

Teleconference 18 and 19.05.2022

Agenda

1. Opening and approval of agenda
2. Secretariat updates
3. Review of GRIB proposals
4. Review of BUFR proposals
5. Review of Common Code Tables proposals
6. Schedule of FT2022-2
7. AOB

Secretariat Updates

• New way to manage branches in GitHub
• Need to finalize all FT22-2 proposals by the end of May/early June.
• brief overview of pending changes to the MoCs vI.2 for INFCOM-3
  • New chapter on CF-NetCDF profiles
  • New regulations for GBON requirements
  • editorial updates based on WMO reform (e.g. change CBS to INFCOM)

GRIB2

The list of issues proposed so far, divided into substantial ones and those with editorial nature.

No.	GRIB2	Issue	Assignee	Status
1.	Issue 89	Surface adjusted wind (UK)	Richard	in discussion
2.	Issue 147	New parameters and table for vegetation/irrigation/wetland (code Table 4.2 and new Code table 4.239 )	Sebastien	In discussion, Sebastien to follow up with Sibylle over whether new descriptor / table is required for wetland type or whether it can be merged with an existing land cover table.
3.	Issue 146	New category "Urban area" within discipline 2 "Land Surface Products"	Sebastien	No objections to new category, Sebastien will also update issue with a table listing all the categories. Branch to be added.
4.	Issue 150	Code Table 4.2: parameters related to energy/water budgets	Sebastien	No objections but some uncertainty over which category some of the new parameters (those related to 'pure' energy as opposed to temperature etc) should go in, help requested. Sibylle to consult with experts in DWD.
5.	Issue 149	Code table 4.2 - New parameters for ocean modelling (part 2)	Sebastien	Within ECMWF there is a move away from NetCDF to GRIB with the ocean models and new GRIB parameters are required. Internal experts at ECMWF are happy with the proposal but it would be good to get a second opinion from experts in the ocean modelling community on names, units etc to check for errors / clarity. David to follow up and identify who to consult with.
6.	Issue 151	Code Table 4.2 - add pH in discipline 0 category 20	Sebastien	No objections, branch to be added.
E. 1	Issue 120	Code Table 4.240/Att.III - Error in function	Anna, Sibylle	Correction required, Sibylle has consulted with colleagues and will forward the correct verison David and Anna who will then update the Manual on Codes.
E. 2	Issue 145	Correct units in Code table 4.2 discipline 4 category 4	Anna	Delayed until Anna is back in the office
E. 3	Issue 144	Mistake in Flag table 3.4 - scanning mode	Anna	Simple correction ot typographical error, Manual on Codes will be updated.

BUFR4

The list of issues under consideration, divided into substantial ones and those with editorial nature.

No.	BUFR4	Issue	Assignee	Status
1.	Issue 78	Proposal for BUFRCREX_CodeFlag_en_40.csv	Simon	Delayed until May meeting. Simon to follow up and report back.
2.	Issue 108	New code for occultation sounding	Marijana	No objections, branch to be created
3.	Issue 111	New BUFR codes for Retrieval identifier	Marijana	Discussion over name / text for new entry in code table (note also typo, Aelous -> Aeolus). Marijana to consult with the data providers and whether the entry can be made more generic.
4.	Issue 115	New BUFR template for CCI snow cover fraction	Marijana	No objections to sequence and consenus on new code table entry after discussion. Marijana and Sibylle to work on validation, new branch to be created.
5.	Issue 112	New code for TROPICS in Satellite classification	Marijana	No objections, new branch to be created
6.	Issue 109	New BUFR descriptor for light source	Marijana	In progress, discussion over new descriptor and meaning of the values. Marijana to add explanatory note, linking to the Hipparcos catalogue.
7.	Issue 114	Code table 0 20 009 - General weather indicator (TAF/METAR): new entry NCD	Sybille	No objections, branch to be created
8.	Issue 113	Code table 0 08 092 - Measurement uncertainty expression: New entry	Sybille	No objections, reference to BIPM GUM to be included.
9.	Issue 117	New BUFR template for TROPICS	Marijana	In progress, wew sequence and elements discussed. Some uncertainty over bit flag meaning, Marijana to follow up with providers and to update proposal. Consultation with CGMS also required.
10.	Issue 106	Create new 3-15-023 sequence, to allow for use of correct range of WMO identifiers which cannot be stored using 3-15-013	Jeff	In progresss.
11.	Issue 118	New Table B descriptor for "Satellite sub-identifier"	Jeff	In progresss.
12.	Issue 5	Additional bio-geochemical sequences for data from Argo profiling floats	David	Delayed by issue 16 (Glider template).
13.	Issue 102	Create 0 02 012	Anna	In discussion

Common Code Tables

The list of issues under consideration, divided into substantial ones and those with editorial nature.

No.	CCT	Issue	Assignee	Status
1.	Issue 84	Add a new entry to C-8 to identify GNOS-2 and MWTS-3 on FY-3E	Liu Yiming	No objections, branch to be created.
2.	Issue 85	Add a new entry to C-2 Korean equipment code for WeatheX WxR-301D	Marijana	No objections, branch to be created
3.	Issue 86	Add a new entry to C-8 to identify rescued satellite instruments, ALTIUS and TMS	Marijana	In progress, CGMS to be asked to assign code numbers.
4.	Issue 88	Add new entry to C-5 to identify ALTIUS, EarthCARE and TROPICS	Marijana	In progress, some changes required as per disucssion in issue.
5.	Issue 82	New entry in Common Code Table C12 for DBNet station of Cayenne (French Guiana)	Yann	No objections, branch to be added.
6.	Issue 91	New entry in CCT C-14	Jeff	No objection, branch to be created
7.	Issue 92	New H2O entries in C-14	Sebastien	In progress, Sebastien to add code numbers for new entries.
8.	Issue 83	Add new data designators T1T2 to Manual on the GTS	Anna	In discussion
E 1.	Issue 89	Fix typo in Common Code table C-14	Sebastien	Typo to be fixed

Recommended practice of Github issue management

• When a new proposal (issue) is created, the issue is generally assigned to the person who makes the proposal and put in "submitted" status.
• Once the team agrees to the general approach and decides to go to validation status, chair moves the issue to "in validation" status and the Secretariat creates a branch. If further discussion is necessary, the issue is moved to "in discussion" status.
• Once the team agrees to the final proposal, asignee consolidates the finalized the proposal in the original post, updates the branch, and post a comment saying "branch updated" with mention to Chair and the Secretariat. (Please do not change issue status.)
• Chair confirms that the proposal is finalized and the associated branch is updated, and moved the issue to the "validated" status.

Schedule for FT2022-2

• One 2-hour meeting to confirm schedule: March 16
• Deadline for submission of proposals: March 31
• Two 2-hour meetings to review new proposals: April 26 & 28
• Two 2-hour meetings to conclude the proposals: May 18-19
• Deadline for validation (if not completed by the meeting above): June 3
• One additional meeting to finalize remaining issues if necessary: June 8
• National Focal Point review: mid-July 2022
• WMO adoption process: mid-September 2022
• Codes are officially operational: mid-November 2022

AOB

• Meeting on May 19 is cancelled
• (not discussed) Development of standardized reporting practices for hourly reporting from GBON stations (Issue 107)

List of participants

No.	Name	Agency	May 18	May 19
1	Jeffrey ATOR	NOAA	X
2	Marijana CREPULJA	ECMWF	X
3	Simon Stuart ELLIOTT	EUMETSAT	X
4	Sergio Henrique Soares FERREIRA	National Institute for Space Research, Brazil	X
5	Tom KRALIDIS	Environment and Climate Change Canada
6	Sibylle KREBBER	DWD	X
7	Abderrazak LEMKHENTER	Météo Maroc	X
8	Marian MAJAN	HMEI	X
9	Sébastien VILLAUME	ECMWF	X
10	Richard WEEDON	Met office
11	Enrico FUCILE	WMO Secretariat
12	Anna MILAN	WMO Secretariat	X
13	David BERRY	WMO Secretariat	X
14	Xiaoxia CHEN	WMO Secretariat
15	XUE Lei	CMA	X
16	Antoine MERLE	EUMETSAT	X