TT AvData Teleconference 2021 Jul 29

Details

2021-July-29, 11:00-12:30 UTC, Microsoft Teams

Agenda

1. Review outcome of ICAO METP/5 involving TT-AvData and stakeholder discussion
   • Requirement analysis of the proposed Am81 to Annex 3
2. Discuss follow up actions and determine an action plan

Minutes

Outcome of ICAO METP/5 involving TT-AvData

• Proposed Amendment 81 to ICAO Annex 3
  • Create the capacity, to enable States that wish to do so, to provide additional information in IWXXM form:
    • METAR/SPECI: Remove the constraint to the number of runways when reporting RVR
    • METAR/SPECI: Allow the inclusion of tenths of a degree in temperature and dew point temperature
    • All related reports: Clarify the limitation to the number of coordinates in a polygon applies to TAC only
  • Introduction of TAC and IWXXM forms of VONA (Volcano Observatory Notice to Aviation), requiring new WMO AHLs and new IWXXM schema. TAC will be developed first and they are expecting IWXXM to be developed from that.
  • Consequential changes to VAA with the introduction of VONA
  • Introduction of QVA (Quantitative Volcanic Ash) forecast which is solely on IWXXM
  • Refine the representation of SWA
• WAFS' requirement for using alternative data formats, in addition to GRIB2, for the provision of gridded data on SWIM, perhaps NetCDF or GeoJSON.
• A Class Diagram showing inter-relationships among entities (institutions, deliverables, activities, etc.) can be found here. It it interesting to note that the focus on the new generation of WG-MIE (and also other groups) activities has shifted to the development of the future information model for use with SWIM, versus legacy version of IWXXM.

Outcome of the stakeholder discussion on 28 Jul 2021

• See summary here
• (Choy) tried to convince them to make available new information inline with the object model instead of the flat structured TAC templates. As they are not quite familiar with the object model the team will present a first draft of the information model on VONA and QVA and engage a mutual learning interaction with them.

Development of Amd81

Mark Oberfield will be leading on this development. He will work in EA and post to GitHub for review for team. Choy can focus on code management and schema management (with collaboration with Mark).

Timeline:

Time	Milestone
April 2022	ICAO Annex 3 State consultation / IWXXM Public Consultation
April 2023	ICAO Annex 3 approval
June 2023	Submission of FT 2023-2
Nov 2023	ICAO Annex 3 applicable. FT 2023-2 approval + effective

• (Anna) enquired whether there could be any need to approve/publish IWXXM in between now and FT 2023-2. (Choy) mentioned that unless an emergency fix is needed there should not be any.
• (Mark) expressed concern about communication during the IWXXM public consultation period. Who does an external partner reach out to? (Anna) the former members of the google group are included on the WMO email group: [email protected] and anyone can email it or join. The managers of the group will have to approve the email if they are not on the list yet. There is an archive of the discussions but only those who have joined can access. (Mark) would like to have an open forum, like we used to have with the Google group. (Choy) is actively maintaining the Wikipedia page for IWXXM. He agreed with Anna that and it is unreliable in the sense that it can be edited by anybody, and therefore cannot replace the team's page on WMO community website. (Jan) also updates wikipedia pages. It's a first location for many people to go to. (Choy and Anna) will work on a simple page for the WMO community website so that it can be the official portal of the team and IWXXM.

Next Meeting

Oct 15, 2021 11 UTC

Attendees

• BL Choy
• Mark Oberfield
• Dirk Zinkhan
• Anna Milan
• Ján Körösi

Apologies

• Xiaoxia Chen
• Enrico Fucile
• Yann Génin
• Stephanie Wigniolle
• Dmitry Moryakov