Katrin and all,

I hope you all have a good time there.

I can join the discussion if it is after 6:00 am my time (EST).

Any meeting before 6:00 am EST will be too much for me (sorry).

If I cannot join the meeting, I think it may be worth discussing

  • 1) LSW-based observation errors for individual RO profiles
    How can local spectral width (LSW) support a profile-specific, vertically varying observation-error assignment instead of a fixed error model? Discuss calibration across missions, treatment of vertical error correlations and representativeness errors, and experiments to determine whether these assignments improve assimilation and forecasts.

  • 2) Lessons from ROMEX for global and regional NWP
    What do ROMEX experiments establish about the benefits of additional RO observations, including their number, geographic distribution, quality, and assimilation frequency? Distinguish demonstrated global NWP impacts from conclusions that require dedicated regional experiments, particularly regarding lateral boundary conditions, assimilation windows, and regional observation coverage.

  • Best,

    • Ben




    ==============================================

    Shu-peng Ben Ho, Ph. D.


    GNSS Radio Occultation Physical Scientist

    NOAA Center for Satellite Applications and Research (STAR)


    NCWCP, E/RA-21 Office# 2824

    5830 University Research Court

    Riverdale Park, MD 20737

    Tel : (301) 683-3596

    Email: shu-peng.ho@noaa.gov


    STAR GNSS RO Center: https://gpsmet.umd.edu/gnssro/index.php

    STAR GNSS RO Data Service: https://gpsmet.umd.edu/gnssro/download.php

    Publication: researchgate.net/profile/Shu-Peng-Ho/publications


    ==============================================




    On Tue, Sep 8, 2026 at 6:26 AM Katrin Lonitz via Announcements <announcements@lists.irowg.org> wrote:
    Hi,

    The IROWG organizers now told me that they will make it possible to join the NWP discussion group on Saturday morning (CEST/UTC+2h) from remote.
    Let me find out more on Thursday/Friday.

    Katrin 
    From: Katrin Lonitz via Announcements <announcements@lists.irowg.org>
    Sent: 28 August 2026 15:06
    To: Neill Bowler via Announcements <announcements@lists.irowg.org>; Fiona Smith <fiona.smith@bom.gov.au>
    Cc: Birtukan Biadglgne <birtukan.biadglgne@bom.gov.au>; Shao, Hui CTR (USA) <hui.shao.ctr@us.navy.mil>; Neill Bowler <neill.bowler@metoffice.gov.uk>; Katrin Lonitz <katrin.lonitz@ecmwf.int>
    Subject: [IROWG Announcements] Re: Discussion topics for NWP-subgroup
     
    Hi everyone,

    Thanks for your input!
    Let me ask one of the IROWG local organisers about the possibility to have remote participation. I'll update you on this topics as soon as I have some news.

    Katrin
    From: Neill Bowler via Announcements <announcements@lists.irowg.org>
    Sent: 11 August 2026 16:55
    To: Shao, Hui CTR (USA) via Announcements <announcements@lists.irowg.org>; Fiona Smith <fiona.smith@bom.gov.au>
    Cc: Birtukan Biadglgne <birtukan.biadglgne@bom.gov.au>; Shao, Hui CTR (USA) <hui.shao.ctr@us.navy.mil>; Neill Bowler <neill.bowler@metoffice.gov.uk>
    Subject: [IROWG Announcements] Re: Discussion topics for NWP-subgroup
     

    OFFICIAL


    Hi Fiona,

     

    If I remember correctly, last time we were in Leibnitz the NWP discussion was conducted in the main auditorium. That’s probably tricky to have remote participation, but I’m sure we can find a way if you’re keen.

     

    The main aim of the subgroup is to provide recommendations for CGMS. So, is there a regional-specific recommendation that we could discuss (i.e. continue increasing observation density so that regional models also have sufficient observations)? We perhaps could reserve a little time for discussions of best practice in regional NWP. However, an extended discussion feels like a topic for the coffee breaks… 😐

     

    Cheers,

     

    Neill

     


    OFFICIAL

    From: Shao, Hui CTR (USA) via Announcements <announcements@lists.irowg.org>
    Sent: 11 August 2026 14:07
    To: Fiona Smith <fiona.smith@bom.gov.au>; Neill Bowler via Announcements <announcements@lists.irowg.org>
    Cc: Birtukan Biadglgne <birtukan.biadglgne@bom.gov.au>; Shao, Hui CTR (USA) <hui.shao.ctr@us.navy.mil>
    Subject: [IROWG Announcements] Re: Discussion topics for NWP-subgroup

     

    Indeed, regional RO studies haven’t been a focused topic partially because we didn’t have enough data for studies. But with more data kicks in from private section, this could be a good topic. My opinion. 

     

    There is no official remote access so far. But it does make me feel if the subgroup lead would like to have remote participants, we probably can just try to use someone’s laptop with wifi. This is an old facility so I don’t know how well it could be though. 

     

    Best regards,

     

    Hui 

     

    From: Fiona Smith (she/her) <Fiona.Smith@bom.gov.au>
    Date: Monday, August 10, 2026 at 8:36     PM
    To: Neill Bowler via Announcements <announcements@lists.irowg.org>
    Cc: Birtukan Biadglgne <birtukan.biadglgne@bom.gov.au>; Shao, Hui CTR (USA) <hui.shao.ctr@us.navy.mil>
    Subject: [Non-DoD Source] RE: Discussion topics for NWP-subgroup

    OFFICIAL

    Now with Hui's correct email address!

    --
    Fiona Smith (PhD, she/her)
    Satellite Data Assimilation Team Leader
    Science and Innovation Group




    OFFICIAL
    > -----Original Message-----
    > From: Fiona Smith (she/her)
    > Sent: Tuesday, 11 August 2026 10:33 AM
    > To: 'Neill Bowler via Announcements' <announcements@lists.irowg.org>
    > Cc: Birtukan Biadglgne <birtukan.biadglgne@bom.gov.au>; Hui Shao
    > <huishao@ucar.edu>
    > Subject: RE: Discussion topics for NWP-subgroup
    >
    > Hi Neill,  cc Hui
    >
    > If there's time, could we add a discussion on experiences using RO in small
    > domain/convection-permitting models?
    >
    > Note that we aren't able to participate in person this year, but Hui said she enable
    > us to participate remotely if at all possible - I don't know if that would extend to your
    > working groups though.
    >
    > Thanks,
    > Fiona
    >
    > --
    > Fiona Smith (PhD, she/her)
    > Satellite Data Assimilation Team Leader
    > Science and Innovation Group
    >
    >
    >
    > > -----Original Message-----
    > > From: Neill Bowler via Announcements <announcements@lists.irowg.org>
    > > Sent: Tuesday, 11 August 2026 1:28 AM
    > > To: announcements@lists.irowg.org
    > > Cc: Neill Bowler <neill.bowler@metoffice.gov.uk>
    > > Subject: [IROWG Announcements] Discussion topics for NWP-subgroup
    > >
    > > OFFICIAL
    > >
    > >
    > >
    > > Dear IROWG community,
    > >
    > >
    > >
    > > We are currently preparing the agenda for upcoming discussions of the
    > > IROWG NWP Working Group and would appreciate your input.
    > >
    > >
    > >
    > > Are there any issues, challenges, scientific questions, or emerging
    > > topics that you would like the group to discuss? This could include
    > > operational experiences, data quality concerns, assimilation
    > > developments, observation operator issues, future missions, or any other topic
    > relevant to the use of RO observations in NWP.
    > >
    > >
    > >
    > > So far, we have this tentative list of topics:
    > >
    > > *   Is there a case to be made for NWP benefiting from more than 20k
    > > occultations per day?
    > > *   What evidence do we have for the additional benefit from an even coverage
    > > of data in latitude and local time? (Thanks Rick for sharing Nikki’s paper)
    > > *   With the transition to US data to NOAA-STAR, what does the community
    > > need in order to ensure that the transition is successful?
    > >
    > >
    > >
    > > Please send us your suggestions by replying to this email. We welcome
    > > contributions from all members of the IROWG community.
    > >
    > >
    > >
    > > We look forward to hearing your ideas.
    > >
    > >
    > >
    > > Kind regards,
    > >
    > >
    > >
    > > Katrin Lonitz and Neill Bowler
    > > Chairs of the IROWG NWP Working Group
    > >
    > >
    > >
    > > Neill Bowler   GNSS radio occultation
    > >
    > > Met Office  FitzRoy Road  Exeter  EX1 3PB  United Kingdom
    > >
    > > Tel: +44 (0)3301 351859
    > >
    > > neill.bowler@metoffice.gov.uk <mailto:neill.bowler@metoffice.gov.uk>   Web:
    > > https://usg01.safelinks.protection.office365.us/?url=http%3A%2F%2Fwww.metoffice.gov.uk%2F&data=05%7C02%7Chui.shao.ctr%40us.navy.mil%7Ca8a067b34b374d5ebb5e08def7408a74%7Ce3333e00c8774b87b6ad45e942de1750%7C0%7C0%7C639220053770425213%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=psiHHrlAPNFK2RE3fwA%2Fgh%2BOc0076OKHAGiqYBpIzo4%3D&reserved=0
    > > <https://usg01.safelinks.protection.office365.us/?url=http%3A%2F%2Fwww%2F&data=05%7C02%7Chui.shao.ctr%40us.navy.mil%7Ca8a067b34b374d5ebb5e08def7408a74%7Ce3333e00c8774b87b6ad45e942de1750%7C0%7C0%7C639220053770440862%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=LTjxiTbEyaUiiF7qeIoeM%2BHM2KbMcYIsNF%2BY9Stgneo%3D&reserved=0.
    > > metoffi
    > >
    > ce.gov.uk%2F&data=05%7C02%7Cfiona.smith%40bom.gov.au%7Cd5ac356473c
    > >
    > 744c1e9af08def6f41b3f%7Cd1ad7db597dd4f2b816e50d663b7bb94%7C0%7C0
    > >
    > %7C639219725479360481%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hc
    > >
    > GkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjo
    > >
    > yfQ%3D%3D%7C0%7C%7C%7C&sdata=BGZktgb3Rz2dwX5uixxnDddPxT%2Ba
    > > toJtXYbQgBtgDm8%3D&reserved=0>
    > >
    > > Pronouns: he, him, his. Why specify gender pronouns?
    > > <https://usg01.safelinks.protection.office365.us/?url=https%3A%2F%2Fwww%2F&data=05%7C02%7Chui.shao.ctr%40us.navy.mil%7Ca8a067b34b374d5ebb5e08def7408a74%7Ce3333e00c8774b87b6ad45e942de1750%7C0%7C0%7C639220053770453185%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=2BFsKIzTVJlSqBum2ebOdmg9ub9UajOOGhOoorp5JbM%3D&reserved=0
    > > .cultur
    > > eamp.com%2Fblog%2Fsharing-gender-pronouns-at-
    > >
    > work&data=05%7C02%7Cfiona.smith%40bom.gov.au%7Cd5ac356473c744c1e9
    > >
    > af08def6f41b3f%7Cd1ad7db597dd4f2b816e50d663b7bb94%7C0%7C0%7C639
    > >
    > 219725479382065%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRy
    > >
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    > >
    > %3D%7C0%7C%7C%7C&sdata=dy0fwUImPPLZHhxVsA4nbplezIex9KQTtbT8m
    > > vi9uto%3D&reserved=0>
    > >
    > >
    > > <https://usg01.safelinks.protection.office365.us/?url=https%3A%2F%2Fwww%2F&data=05%7C02%7Chui.shao.ctr%40us.navy.mil%7Ca8a067b34b374d5ebb5e08def7408a74%7Ce3333e00c8774b87b6ad45e942de1750%7C0%7C0%7C639220053770464100%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=SkiFM2VSEFK%2BxR3RDV93d0CGmd0xHQxWoUd0QIBsTV8%3D&reserved=0
    > > .name
    > > -coach.com%2Fneill-
    > >
    > bowler&data=05%7C02%7Cfiona.smith%40bom.gov.au%7Cd5ac356473c744c1e
    > >
    > 9af08def6f41b3f%7Cd1ad7db597dd4f2b816e50d663b7bb94%7C0%7C0%7C63
    > >
    > 9219725479654104%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnR
    > >
    > ydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D
    > >
    > %3D%7C0%7C%7C%7C&sdata=zBI%2BUUai9uxDeurlodDS6FQ8BuSId2jmXMt
    > > Gy%2BqVhk0%3D&reserved=0>
    > >
    > >
    > >
    > >
    > > OFFICIAL
    > >

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