Announcement

Aug 23 2025

Third GNSS-PRO Workshop in November – Registration is now open

Dear all,

The “3rd GNSS Polarimetric Radio Occultations Workshop” will take place 10-12 November 2025, at the EUMETSAT headquarters in Darmstadt, Germany.

Registration is now available at the workshop main page. Deadline is 25 Oct 2025. 

This third workshop follows on to the “2nd GNSS Polarimetric Radio Occultation workshop” from 2023. It represents a forum for addressing multiple uses and applications that have been studied in the seven years that polarimetric RO (PRO) data have been available, align the presentation of these results, and prepare recommendations for meteorological, space and research organizations (e.g., CGMS agencies, the EUMETSAT ROM SAF) and satellite data providers.

The workshop will feature presentations and discussions in the following areas:

  • Status of current and future polarimetric-capable RO observations
  • Precipitation, convection, extreme precipitation events
  • Use of PRO to evaluate model microphysical parameterization schemes
  • NWP and climate model evaluation
  • Assimilation of PRO observations
  • Simulations and comparisons between PRO and passive MW radiances
  • Recommendations to space agencies and data providers
  • ROM SAF consultation process

While the workshop will offer a hybrid attendance format, in-person attendance is encouraged. If you would like to present materials at the workshop, you can enter (even a tentative) title at the time of registration. An abstract is not required. Further information and an agenda will be provided after registration closes.

With kind regards,

Christian Marquardt on behalf of Estel Cardellach (IEEC) and Joe Turk (JPL)

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Jun 20 2025

Call for Papers: ROMEX Special Issue in Atmospheric Measurement Techniques (AMT)

Dear all,

I’m pleased to announce that the Atmospheric Measurement Techniques (AMT) special issue titled
“The Radio Occultation Modeling EXperiment (ROMEX): observational quality, processing, and numerical weather prediction (NWP) applications”
is now open for submissions.

ROMEX, an IROWG-led initiative, aims to assess the impact of ~35,000 daily radio occultation (RO) profiles—collected from 13 missions during September–November 2022—on numerical weather prediction. This international campaign involves contributions from data providers, processing centers, and forecasting institutions across the global research and operational communities.

The special issue welcomes papers using ROMEX data on topics including, but not limited to:

  • RO data quality and processing

  • Evaluation and validation of RO datasets

  • Impact studies in NWP and other atmospheric applications

Submission is open from 1 May 2025 to 31 December 2026 (extensions possible).
🔗 Submit here: https://editor.copernicus.org/AMT/manuscript_registration
Please ensure the correct special issue title is selected during submission. Editorial assignment follows a first-come, first-served policy.

📄 A full description of the special issue is available at:
https://www.atmospheric-measurement-techniques.net/articles_and_preprints/scheduled_sis.html# (under 2025)

We look forward to your contributions!

By • ,

Mar 25 2025

CGMS-53 IROWG documents and presentations now available online

Dear IROWG,
This week marks the CGMS-53 Working Group meeting. Our IROWG documents and presentations – building on insights from IROWG-10 and the Second ROMEX Workshop – have been uploaded to the IROWG website: IROWG Documents (CGMS-53 Documents)

They are also available on the CGMS-53 website under the WGII tab: CGMS-53 Website

A huge thank you to everyone who contributed to the workshops, discussions, and recommendations! Your efforts are highly recognized and appreciated by the CGMS WGII leadership, underscoring the impact of our collective contributions. Looking forward to our next collaborative efforts!

Hui Shao

Co-chair of IROWG

UCAR/JCSDA

By • ,

Dec 17 2024

IROWG email list transition is complete

Dear All,

We have completed the transition of the IROWG email list. The previous address, irowglist@irowg.org, is now officially retired. Going forward, all IROWG announcements will be sent to the new email address. The IROWG website has also been updated with the latest contact information. Please help spread the word within your networks.

I would like to extend my gratitude to Christian Marquardt and EUMETSAT for their dedicated efforts during this transition and their ongoing support for the new email service. I also appreciate your prompt responses and continued support for the IROWG community.

Wishing everyone wonderful holidays ahead and a fantastic 2025!

By • ,

Dec 12 2024

Reminder: Moving the IROWG mailing list

This is a friendly reminder that we will fully switch to the new mailing list address (announcements@lists.irowg.org) on Dec 15, 2024 (in four days). After the transition day, all announcements relevant to the IROWG community will use the new email list. Only the subscribed members can send posts to this email list. If not yet, please subscribe to the list at https://lists.irowg.org.
The new platform at https://lists.irowg.org offers several advantages:
  • Self-service registration and deregistration.
  • The ability to update your email address.
  • Options to manage delivery settings (e.g., pause emails).
  • Access to an archive of emails (starting from this migration).
To avoid emails being flagged as spam, please add the new mailing list address to your address book.
Thanks,
Hui Shao
Co-chair of IROWG
JCSDA

By • ,

Dec 12 2024

Potential removal of 1D-Var products from BUFR

Hi all,

In looking further at the new BUFR sequence, we have been asked the question whether the 1D-Var products (temperature, pressure and specific humidity) and the surface quantities (surface pressure, geopotential height of surface) are required. These are referred to as Level2b and Level2c products in the ROM SAF BUFR description:

https://rom-saf.eumetsat.int/romsaf_bufr.pdf

We are thinking that NWP centres don’t use these products, and therefore they can be removed from the BUFR format (they may still be available from data providers in other formats).

If you use these products from BUFR files, then please let us know as soon as possible. If we don’t here that they are used, then we will remove them from the new, revised format specification.

Many thanks,

Neill (on behalf of the BUFR format committee)

Neill Bowler GNSS radio occultation

Met Office FitzRoy Road Exeter EX1 3PB United Kingdom

By • ,

Nov 21 2024

The second ROMEX (ROMEX-2) workshop registration open

Dear IROWG/ROMEX community,

You are cordially invited to attend the second IROWG ROMEX (ROMEX-2) Workshop, taking place from February 25–27, 2025, at EUMETSAT Headquarters in Darmstadt, Germany.

Initial results of ROMEX activities were discussed at the First IROWG ROMEX workshop in February 2024 and during the IROWG-10 meeting in September 2024 . The Second ROMEX workshop aims to finalize and consolidate  the findings from various NWP centers and research entities, align the presentation of these results, and prepare recommendations for CGMS agencies. The workshop will focus on presentations and discussions in the following areas:
  • Reports on ROMEX related NWP impact studies and applications
  • Best ways to present ROMEX results to stakeholders and decision-makers
  • Status and plans of relevant RO missions
  • Other relevant developments and research pertaining to ROMEX

The first two days of the meeting will feature presentations and discussions, while the final day will include a plenary session dedicated to consolidating ROMEX findings and finalizing the report and recommendations for CGMS. In-person participation is strongly encouraged, though remote access will be available. A detailed agenda will be provided after registration closes.

Please register at the IROWG ROMEX workshop webpage: here

Registration Deadline: January 20, 2025

Note: A full abstract is not required. Following the approach of the first ROMEX workshop, proposals will be accepted as long as the topics are relevant. Please plan your travel in advance, as the agenda will be finalized in early February.

IROWG would like to express sincere gratitude to EUMETSAT for hosting this meeting and is looking forward to seeing you in Darmstadt.

By • ,

Nov 18 2024

Moving the IROWG mailing list to lists.irowg.org

Dear Friends of IROWG,
As discussed during the IROWG-10 workshop, we are transitioning the IROWG mailing list to a new service provider. The time has come to make this move.

What You Need to Do  (for existing subscribers)

You should have received an email (as of Nov 18, 2024) from our new mailing list address:
This email will ask you to confirm your subscription to the IROWG Announcements list. Please reply to it as soon as possible to make sure you stay on the mailing list.

Trouble Finding the Email? (for existing or new subscribers)

  1. Check your spam or junk folder.
  2. If you still can’t find it or are new to the email list, visit https://lists.irowg.org and subscribe manually (this will trigger another confirmation email).

Note for New Subscribers: 
Approval from the co-chairs is required for subscription (after you submit your request via the website).

Key Dates

From now on, please send all emails to the new mailing list address (announcements@lists.irowg.org). While the old list will remain active temporarily, it will be permanently closed on 15 December 2024. For all the existing subscribers, please confirm your subscription to the new list well before this date. To avoid emails being flagged as spam, add the new mailing list address to your address book. You may still join the new email list after the deadline by following the instructions for the new subscribers (see above).

Benefits of the New Mailing List  

The new platform at https://lists.irowg.org offers several advantages:
  • Self-service registration and deregistration.
  • The ability to update your email address.
  • Options to manage delivery settings (e.g., pause emails).
  • Access to an archive of emails (starting from this migration).
Thank you!

By • ,

Nov 12 2024

Save the Dates: IROWG-11, September 10–16, 2026, Austria

Mark your calendars for the IROWG-11 Workshop, which will take place from September 10 to 16, 2026, at Seggau Castle, Austria. This workshop will be held in conjunction with OPAC-8.

We look forward to your participation!

By • ,

Nov 12 2024

Release of PRO roadmap document

Dear Colleagues,

Following discussions initiated during the 2nd Polarimetric RO Workshop and continued at IROWG-10, a document summarizing the steps toward the full exploitation of the Polarimetric RO technique has been released. You can find the document on the IROWG website:

https://irowg.org/documents/ (under “IROWG Document”. Here is the direct link to the doc)

or via DOI:

https://doi.org/10.20350/digitalCSIC/16636

Please feel free to share this with scientists or organizations that might be interested.

Best regards,
Hui

co-chair of IROWG
On behalf of the authors and PRO WG

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