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<p>Dear Friends and Colleagues,</p>
<p>Please find below the second announcement for the special issue in the journal of <em>Advances in Space Research</em> (ASR).</p>
<p>Guest Editors</p>
<p>M. Muella & F. Prol</p>
<p><br /></p>
<p style="text-align: center;"><strong>Second Announcement for the Special Issue in <em>Advances in Space Research</em> (ASR)</strong></p>
<p>Researchers are invited to submit papers for a special issue of <em>Advances in Space Research</em> (ASR) on <strong>"Ionospheric Imaging: Recent Advances and Future Directions" </strong>(<a href="https://cosparhq.cnes.fr/assets/uploads/2024/04/Ionospheric-Imaging.pdf" target="_blank" rel="noopener noreferrer">https://cosparhq.cnes.fr/assets/uploads/2024/04/Ionospheric-Imaging.pdf</a>). </p>
<p>This edition will explore the latest developments in ionospheric imaging—a technique using ground-based, space-based, and radio occultation systems to create ionospheric images that aid in studying its effects on communication and navigation. The issue will cover topics such as:</p>
<ul>
<li><strong>Validation and enhancement of imaging techniques:</strong> Innovations in 2D, 3D, and 4D imaging from various observations and use of data to refine ionospheric models.</li>
<li><strong>Ionospheric tomography:</strong> Studies on ionospheric variability and new techniques in computerized tomography, including machine learning applications.</li>
<li><strong>Data assimilation for improved imaging:</strong> Advances in data assimilation (DA) techniques to enhance imaging accuracy and applicability for targeted purposes.</li>
<li><strong>Instrumentation advancements and practical applications:</strong> Development of new imaging instruments and applications in communication, navigation, space weather forecasting, and satellite dynamics.</li>
</ul>
<p>This special issue aims to present the current accuracy in ionospheric models, highlight technological impacts across space science, telecommunications, and atmospheric physics, and inspire further research. Manuscripts should be submitted electronically via the ASR portal by <strong>15 January 2025 </strong>(<a href="https://www.editorialmanager.com/AISR" target="_blank" rel="noopener noreferrer">https://www.editorialmanager.com/AISR</a>).</p>
<p>To ensure that all manuscripts are correctly identified for inclusion into the special issue, authors must select “<strong>Special Issue: Ionospheric Imaging</strong>” when they reach the "Article Type" step in the submission process.</p>
<p><strong>Dr. Marcio Muella</strong> (mmuella@univap.br) and <strong>Dr. Fabricio Prol</strong> (Fabricio.dossantosprol@nls.fi) are the Guest Editors for this special issue. Questions can be directed to Drs. Muella or Prol or to the Co-Editor for Special Issues, <strong>Dr. Peggy Ann Shea</strong> (sssrc@msn.com).</p>
<p><br /></p>
<div id="v1v1v1v1v1v1v1v1_rc_sig">-- <br />
<div class="v1v1v1v1v1v1v1v1pre">Marcio Muella - Associate Professor<br />Universidade do Vale do Paraíba - UNIVAP<br />Institute of Research and Development - IP&D<br />São José dos Campos/São Paulo - Brazil</div>
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