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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN">Hello,<o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN"><o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN">My fellow chairs and I would like to invite you to participate in an exciting session at the 2022 International Union of Radio

 Science Atlantic and Pacific Radio Science Meeting (<b>URSI AT-AP-RASC</b>) on <b>

Novel radio instruments and techniques for Space Weather model validation and testing (G02)</b>. The

<b>deadline for abstract submission is January 15<sup>th</sup>, 2022</b>, and abstracts can be submitted using the following link:

<a href="https://www.cvent.com/c/abstracts/93343b14-82d8-4654-ad57-ff824cb5637d">

https://www.cvent.com/c/abstracts/93343b14-82d8-4654-ad57-ff824cb5637d</a><o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN"><o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN">The conference will be hybrid with its in-person component held in Maspalomas in Gran Canaria, 30 May - 4 June, 2022. This

 is an exceptional conference and the venue and supporting accommodations are phenomenal. For more information about the conference please check out the following website:

<a href="https://www.atrasc.com/">https://www.atrasc.com/</a><o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN">Session Description:<o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN"><o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN">Radio propagation in bands ranging from VLF to UHF is crucially reliant or affected by the state of the ionosphere; as such,

 modeling of this propagation is subsequently highly sensitive to the choice of ionospheric representation. There are now dozens of ionospheric models that have been developed by the community with varying degrees of maturity and availability; however, we still

 lack an understanding of whether these models meet the basic needs of radio propagation modelers and users.<o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN">This session seeks to open a dialogue between experimentalists, users, and model developers on approaches and metrics that

 can be used to validate ionospheric models, with focus on radio propagation and Space Weather applications.<o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN">This session encourages submissions on topics including, but not limited to:<o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN"><o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN">1) Radio propagation experimentation;<o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN">2) experiments validating radio propagation models;<o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN">3) efforts or ideas to establish community ionospheric model validation testbeds;<o:p> </o:p></span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;font-size:11pt;font-family:Calibri, sans-serif;margin-bottom:.0001pt;mso-pagination:none;mso-layout-grid-align:none;text-autospace:none">

<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN">4) novel ionospheric and radio propagation model validation metrics;<o:p> </o:p></span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;font-size:11pt;font-family:Calibri, sans-serif;margin-bottom:.0001pt;mso-pagination:none;mso-layout-grid-align:none;text-autospace:none">

<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN">5) new radio propagation observations;<o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN">6) user-defined and user-focused model validation metrics, such as those relevant to GNSS and Over-the-Horizon Radar (OTHR).<o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN"><o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN">If you have been working on new measurement techniques, have been developing new models, or have deployed new instruments to

 the field, we want to hear from you.<o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN"><o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN">As always with the URSI flagship meetings, there is a Student Paper Competition and a Young Scientist Award available as part

 of this conference to support early career and student participation.<o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN"><o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN">Hope to see you in May in Gran Canaria,<o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN"><o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN">David R. Themens, University of Birmingham/University of New Brunswick<o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN">Alessio Pignalberi, INGV<o:p> </o:p></span></p>

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<span lang="EN" style="mso-ascii-font-family:Calibri;mso-hansi-font-family:Calibri;mso-bidi-font-family:Calibri;mso-ansi-language:EN">Fabricio Dos Santos Prol, Finish Geospatial Institute<o:p> </o:p></span></p>

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