2023-06-26 ET-W2AT Meeting

1

Mr Jeremy TANDY

Chair

No

2

Mr Rémy GIRAUD

Member

Yes

3

Mr Pablo Jose LOYBER

Member

No

4

Ms FATIMA SABAI

Member

No

5

Mr Peng  WANG

Member

Yes

6

Mr Tom KRALIDIS

Member

No

7

Mr TSUNODA, Kenji

Member

Yes

8

Dr Baudouin Raoult

Member

Yes

9

Mr Thorsten BÜSSELBERG

Member

No

10

Ms Dana Ostrenga

Member

No

0

Review of actions from the last meeting

Hassan

• Action 1: Secretariat to check the Cg-Ext(2021)/Res.1 to verify the coherence of “no issue in making "more" core data available”

  • Confirmed: No issue in making more core data available. It can be found in Annex 2 to Resolution 1 (Cg-Ext(2021)): (https://library.wmo.int/doc_num.php?explnum_id=11113#page=21)

3.4 The recommendation to Members is therefore to adopt the following national practice regarding the exchange of Earth system data

(e) Members are encouraged to broaden the provision of their data with a minimum of conditions beyond the minimum set of data listed in Annex 1 to the present resolution.

• Action 2: GTS to WIS2 Gateway: Secretariat to confirm with DWD and JMA if they are providing these gateways

  • DWD is doing it using Topic Hierarchy: cache/a/wis2/xxg/gts_to_wis2_dwd/TTAAii

• Action 3: WIS2 to GTS Gateway: Secretariat to check if TTAAii is enough or we need CCCC

  • CCCC is needed after consultation with GTS experts in BoM, JMA, DWD and Morocco Météo.

1

"Urgent" 

• Assignment of topics for multidisciplinary datasets https://github.com/wmo-im/wis2-topic-hierarchy/issues/36  

• Notification mechanism on updated data https://github.com/wmo-im/tt-nwpmd/issues/9  

• Clarify broker protocol elements https://github.com/wmo-im/wis2-guide/issues/5  

• WP8.2 WIS2 -> GTS Gateway https://github.com/wmo-im/wis2pilot/issues/9  

• KPIs for the transition from GTS to WIS2 https://github.com/wmo-im/wis2-guide/issues/20  

• Lifecycle management of discovery metadata in WIS2 https://github.com/wmo-im/wis2pilot/issues/85  

• Non-functional performance measures need to be defined https://github.com/wmo-im/wis2-guide/issues/23  (or at least start defining them) 

• GTS -> WIS2 Gateway will operate a decision made, but ET-W2AT should confirm how to operate. 

(1) Rémy: agreed the current decision

Timo: to provide supporting documents of MQTT best practice.

In general, MQTT best practice is to publish the message with two (multiple) topics.

(2)WIS2 Guide will be a collection of all information.

(3)clarify QoS parameters as well as retention for brokers

Decision: to park this now

Action: For Remy to check with Verne MQ to discuss with MQTT experts for their advice to selecting the parameters

Action (TBC): For Peng to discuss with EMQS experts for possible suggestion, if possible

(4) WP8.2 WIS2 to GTS gateway,

https://github.com/wmo-im/wis2-notification-message/issues/24

Action: Hassan to provide the document with decisions and relevant information( update ASCII code, MQTT parameters (needed) as an individual document, all independent documents that can be integrated into WIS2 guidance)

WHO will run for the gateway?

• Considering no volunteer for the Gateway, proposed solution is for one or two RTHs per region to do the gateway from WIS2 to GTS.

• Action: Hassan will collect all RTH contact points. Hassan proposed to have meetings with potential RTH providers and prepares one page for this.

(5) KPIs for the transition from GTS to WIS2

Decision: Kai agrees to run the GTS to WIS2 Gateway by DWD during transition

Action: Kenji to check the possibility of providing the gateway by JMA

(Kai) DWD metrics number of observations received in DWD and WIS2 network. Per station and per country.

(Enrico) High-level KPIs, not too technical, for communication to EC/Cg is needed to get started. For example, the number of Members disseminating data in GTS but not WIS2; the number of Members migrating to WIS2.

Action: Enrico to provide a drafted version of high-level KPIs to be submitted to INFCOM-3.

2

"We need to figure this out for the pilot project" 

• Clarify whether data other than "core data" can be cached by Global Cache https://github.com/wmo-im/tt-nwpmd/issues/10  

• How to push alerts back to originating WIS2node? https://github.com/wmo-im/wis2-guide/issues/8  

• Non-functional performance measures need to be defined https://github.com/wmo-im/wis2-guide/issues/23  

• Portal for WIS2 https://github.com/wmo-im/wis2-guide/issues/21  

• Guidance for data consumers https://github.com/wmo-im/wis2-guide/issues/22  

• Are Global Caches required to validate the data they cache? https://github.com/wmo-im/wis2pilot/issues/86  

Not discussed

3

"We need to figure this out for INFCOM3" 

• Approval procedures of Global Services and nodes https://github.com/wmo-im/wis2-guide/issues/17  

• Version management of Topic Hierarchy https://github.com/wmo-im/wis2-topic-hierarchy/issues/25  

• Clarify the retention for the WIS2 node https://github.com/wmo-im/wis2-guide/issues/18  

• ICAO and GTS headers https://github.com/wmo-im/wis2-guide/issues/19  

Not discussed