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January 2026

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URSI GASS (15-22 August 2026) - Session G06: LEO topside and radio occultation measurements for ionosphere and plasmasphere estimation and modelling
by Riccardo Notarpietro 26 Jan '26

26 Jan '26

Dear Colleagues. Apologies for any cross-posting. The XXXVIth URSI General Assembly and Scientific Symposium (URSI GASS 2026) will be held in Krakow, Poland, August 15 to 22, 2026. We cordially invite you to submit contributions to the Session G06 - LEO topside and radio occultation measurements for ionosphere and plasmasphere estimation and modelling (see description below). URSI-GASS accepts three types of submissions: (a) Summary paper, of length between 2 and 4 pages (b) An extended abstract of 1 page maximum (c) A full paper for the student paper competition, prepared as submission to the Radio Science Letters All information about GASS 2026 including paper submission, student paper competition, and young scientist awards can be found at URSI-GASS 2026 | URSI-GASS 2026<https://www.ursi-gass2026.pl/>. SUBMISSION DEADLINE: Paper/abstract submission deadline is: January 25, 2026 Best regards, Mainul Hoque, Riccardo Notarpietro, Manuel Hernandez-Pajares, Marjolijn Adolfs ______________________________________________________________________ G06: LEO topside and radio occultation measurements for ionosphere and plasmasphere estimation and modelling Organizers/Convenors: Mainul Hoque, Riccardo Notarpietro, Manuel Hernandez-Pajares, Marjolijn Adolfs Session Description: The availability of numerous medium Earth orbit (MEO) satellites deployed by GPS, Galileo, GLONASS, and BeiDou systems allows continuous and reliable monitoring of the Earth's ionosphere and neutral atmosphere by tracking GNSS multifrequency signals from Low Earth orbiting (LEO) satellites. From the proof-of-concept GPS/MET experiment on Microlab-1, flown within the years 1995 -1997, till the today's EUMETSAT's Metop-B and Metop-C, the FORMOSAT-5/COSMIC-2, the numerous CubeSats operated by commercial entrepreneurs (e.g., Spire, PlanetIQ) and the recently launched Metop-SGA1, they all have demonstrated a huge potential of the limb sounding technique on LEO satellites for atmosphere/ionosphere sounding. In addition, the LEO onboard navigation and in-situ measurements can be used to derive the topside total electron content (TEC) and electron density at orbit heights. However, improved inversion techniques, assimilation methods including high-resolution tomography and powerful processing systems need to be developed for improved space weather monitoring, forecasting and modelling. Long term RO and topside data obtained by combining multi-instrument multi-satellite data has a large potential for climate related assessments. With more than 3 decades, i.e. almost 3 solar cycles of continuous LEO observations being available now, together with advanced machine learning techniques we have the unprecedented opportunity to model the ionosphere and plasmasphere with greater accuracy and detail. In this session, contributions on new techniques to estimate the electron density and TEC distribution, ionospheric gradients and irregularities using onboard LEO data, and their ingestion into data assimilation models for supporting space weather applications are welcome. Any email message from EUMETSAT is sent in good faith but shall neither be binding nor construed as constituting a commitment by EUMETSAT, except where provided for in a written agreement or contract or if explicitly stated in the email. Please note that any views or opinions presented in this email are solely those of the sender and do not necessarily represent those of EUMETSAT. This message and any attachments are intended for the sole use of the addressee(s) and may contain confidential and privileged information. Any unauthorised use, disclosure, dissemination or distribution (in whole or in part) of its contents is not permitted. If you received this message in error, please notify the sender and delete it from your system.

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Reminder: ROMEX Special Issue in AMT – Call for Papers
by Hui Shao 06 Jan '26

06 Jan '26

Dear colleagues, This is a friendly reminder about the *ROMEX Special Issue* in *Atmospheric Measurement Techniques (AMT)*. If you have ROMEX results or have used any part of the ROMEX dataset, we strongly encourage you to consider submitting your work to this AMT Special Issue. Our aim is to bring ROMEX-related studies together in one place to support focused discussion and visibility across the community. Manuscripts can be submitted through the AMT online submission system by selecting the correct special issue title during registration: https://editor.copernicus.org/AMT/manuscript_registration *Submission is open through **31 December 2026 (extension possible)*, and submissions will be handled through the standard AMT peer-review process. For full details on submission instructions and the scope of the special issue, please see the original call for papers: https://amt.copernicus.org/articles/special_issue1367.html Please feel free to share this announcement with interested colleagues. Best regards, Hui Shao on behalf of the ROMEX Committee

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