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<div>Hello,</div>
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<div>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 (URSI AT-AP-RASC) on
<b>Novel radio instruments and techniques for Space Weather model validation and testing (G02)</b>.</div>
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<div>The conference will be held in Maspalomas in Gran Canaria, 30 May - 4 June, 2022. This is an exceptional conference and the venue and supporting accommodations are phenomenal. </div>
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<div><b>Session Description:</b></div>
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<div><i>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.
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<div><i>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.
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<div><i>This session encourages submissions on topics including, but not limited to:</i></div>
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<div><i>1) Radio propagation experimentation;</i></div>
<div><i>2) experiments validating radio propagation models;</i></div>
<div><i>3) efforts or ideas to establish community ionospheric model validation testbeds;</i></div>
<div><i>4) novel ionospheric and radio propagation model validation metrics;</i></div>
<div><i>5) new radio propagation observations;</i></div>
<div><i>6) user-defined and user-focused model validation metrics, such as those relevant to GNSS and Over-the-Horizon Radar (OTHR).</i></div>
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<div>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.</div>
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<div>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.</div>
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<div>Hope to see you in May in Gran Canaria,</div>
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<div>David R. Themens, University of Birmingham/University of New Brunswick</div>
<div>Alessio Pignalberi, INGV</div>
<span>Fabricio Dos Santos Prol, Finish Geospatial Institute</span><br>
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