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Dear Colleagues</div>
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Thursday Feb 20th is the Abstract deadline for the Sydney, Australia URSI meeting.</div>
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We would like to draw your attention to the session G11: <b>Nowcasting and forecasting Travelling Ionospheric Disturbances for ionospheric weather and mitigation services.</b></div>
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The <b>URSI AP-RASC 2025</b> conference (<a href="https://urldefense.us/v2/url?u=https-3A__ap-2Drasc.com_home.php&d=DwMDaQ&c=L4IogQUxJwxc-F14PJeZBy0aL1nbCId3JgRjMgunPoM&r=DI_R9rFd3C5fwZnAguX1Hy5pk2jWIAQPY91KxO_9X_I&m=uAfjRMJAzYPfs7qgRv2BXfKO7xbw6UXtUDEFz7rCVjZSvOmmzHZTIVRbd9MJeYTU&s=td31cpdGtIFOiUewlbMwwjFjQy2e5EdUhuNsJBvdGkw&e=" id="OWA4169558b-f3b1-0741-62d4-5fba74f5efc3" class="x_moz-txt-link-freetext OWAAutoLink" data-auth="NotApplicable" style="margin-top: 0px; margin-bottom: 0px;">https://ap-rasc.com/home.php</a>)
will be held in Sydney, Australia, from 17 to 22 August 2025. The session description follows:<br>
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Travelling Ionospheric Disturbances (<b>TIDs</b>) are significant perturbations in the ionosphere that can adversely affect radio communications, navigation systems, and surveillance operations due to rapid changes in electron density. Accurate nowcasting and
forecasting of TIDs are essential for developing ionospheric weather services and implementing effective mitigation strategies. This session focuses on the latest advancements in detecting, modelling, and predicting TIDs to support operational services. We
invite contributions that address innovative observational techniques, including ground-based and satellite-based measurements, data assimilation methods, and the development of physics-based or empirical models for TID prediction. Studies exploring the underlying
physical mechanisms, sources of TIDs, and their propagation characteristics are also encouraged. The session aims to facilitate discussions that enhance the reliability of TID forecasts and improve mitigation services for users impacted by ionospheric disturbances.<br>
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Please, consider session G11 of the URSI AP-RASC 2025 conference to submit your contributions. The abstract submissions can be done through the conference submission website:
<a href="https://urldefense.us/v2/url?u=https-3A__ap-2Drasc.com_papersubmission.php&d=DwMDaQ&c=L4IogQUxJwxc-F14PJeZBy0aL1nbCId3JgRjMgunPoM&r=DI_R9rFd3C5fwZnAguX1Hy5pk2jWIAQPY91KxO_9X_I&m=uAfjRMJAzYPfs7qgRv2BXfKO7xbw6UXtUDEFz7rCVjZSvOmmzHZTIVRbd9MJeYTU&s=QjqZH6K3R67Q8911ApvdPpRBaQhKLqale40agkVisL0&e=" id="OWA5d4838cf-1c56-57dd-193b-9d26760e181f" class="x_moz-txt-link-freetext OWAAutoLink" data-auth="NotApplicable" style="margin-top: 0px; margin-bottom: 0px;">
https://ap-rasc.com/papersubmission.php</a>. <b>The deadline for abstract submission is 20 February 2025</b>.</div>
<p>We look forward to receiving your contributions and to your presence at the G11 session of the URSI AP-RASC 2025 conference.<br>
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Best regards on behalf of Session G11 Conveners, Geoff Crowley, Anna Belehaki, David Altadill, Sivakandan Mani.</p>
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<span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif, serif, EmojiFont; font-size: 12pt; color: rgb(0, 0, 0);"><br>
</span><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif, serif, EmojiFont; font-size: 12pt; color: black;">Geoff</span></p>
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<table id="x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_x_m_-3463055890586488838x_x_x_x_x_x_x_x_x_x_x_x_x_table_0" style="text-align: left; background-color: rgb(255, 255, 255); width: 479.55pt; color: rgb(36, 36, 36); box-sizing: border-box; border-collapse: collapse; border-spacing: 0px;">
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<p style="text-align: left; margin-top: 0px; margin-bottom: 0px;"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif, serif, EmojiFont; font-size: 12pt; color: black;">Geoff Crowley, Ph.D.</span></p>
<p style="text-align: left; margin-top: 0px; margin-bottom: 0px;"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif, serif, EmojiFont; font-size: 12pt; color: black;">Chief Scientist</span></p>
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<p style="text-align: left; margin-top: 0px; margin-bottom: 0px;"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif, serif, EmojiFont; font-size: 12pt; color: black;">M: 210.834.3475</span></p>
<p style="text-align: left; margin-top: 0px; margin-bottom: 0px;"><span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif, serif, EmojiFont; font-size: 12pt; color: rgb(12, 100, 192);"><u>geoff.crowley<a href="mailto:anthony.deming@arcfield.com" id="OWAc5e4dc83-f81a-bdce-dfd4-d6f8035e05c2" class="x_x_OWAAutoLink" title="mailto:anthony.deming@arcfield.com" data-linkindex="0" style="color: rgb(12, 100, 192); margin: 0px;">@arcfield.com</a></u></span></p>
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