General

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.

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)

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!

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

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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!

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