<div dir="ltr"><div>Dear colleagues,</div><div><br></div><div>We are pleased to <span class="gmail-il">announce</span> the next ISWI Seminar of 2023 by <b>Dr Doug Rowland </b>scheduled for <b>September 27th at 3 PM Central European Time (9 AM EDT; 6:30 PM IST)</b>.<br></div><div><br></div><div>In this opportunity, the ISWI seminar will have a hybrid format, the in-person version will be held at the Tucumán Space Weather Center from Universidad Nacional de Tucumán, Argentina.<br></div><div><br></div><div>To register for the <u>virtual seminar</u>, please send an email to: <b><a href="mailto:iswisupport@bc.edu" target="_blank">iswisupport@bc.edu</a>.</b> Please include “ISWI Seminar Registration” in the subject line. There is a limit of 300 participants, so please register your interest as soon as possible. The MS Teams link will be sent to registered participants 2 days before the event.</div><div><br>Please remember that the seminars will be recorded. The playlist with the previous seminars, which will also include future sessions, can be accessed through the following link: <a href="https://www.unoosa.org/oosa/en/ourwork/psa/bssi/iswi_webinars.html" target="_blank">https://www.unoosa.org/oosa/en/ourwork/psa/bssi/iswi_webinars.html</a><br><br></div><div>Looking forward to meeting you in the next ISWI seminar!</div><div>With kind regards,<br><br></div><div>Graciela Molina<br>on behalf of the ISWI Seminar Committee<div><br> <div>***********************************************</div></div><div><div><b>Title:</b> <span style="color:rgb(0,0,0)">NASA’s Geospace Dynamics Constellation: Exploring our Connected Atmosphere</span></div><p style="color:rgb(255,255,255);font-family:"YAD1fQZ_06Y 0",_fb_,auto;line-height:78px"></p><p style="color:rgb(255,255,255);font-family:"YAD1fQZ_06Y 0",_fb_,auto;line-height:40px"><span style="font-weight:700"></span></p><p style="margin-bottom:0in;line-height:17.8px;direction:ltr"><b>Speaker:</b> Dr Doug Rowland</p><div><b><br></b></div><div><b>Abstract:</b> </div></div><span class="gmail-im" style="color:rgb(80,0,80)"><p class="MsoNormal"><span style="color:black">The world relies on satellites in low earth orbit (LEO) for a wide range of commercial, civil space, and defense applications. Though LEO was one of the first space environments studied from the dawn of the space age, increased usage of this region has highlighted large gaps in our understanding and predictive capability. For example, following a SpaceX launch of 49 Starlink satellites in February 2022, 38 of those satellites were lost to unexpectedly high atmospheric drag that ultimately caused them to deorbit. In this region, Earth’s atmophere extends to form a tenuous envelope of electrically neutral gas called the thermosphere, and its electrically conductive counterpart, the ionosphere. These two layers of the upper atmosphere coexist over the same altitude range, and this has dramatic consequences for the variability of the LEO space environment. The coupled plasma-gas system responds to electrodynamic, dynamical, and chemical/photochemical forcing, at a range of spatial scales from sub-kilometer to global and time scales from seconds to decades.<u></u><u></u></span></p></span><p class="MsoNormal"><span style="color:black">NASA plans to develop the Geospace Dynamics Constellation (GDC), a mission within the Heliophysics Living With a Star Program, as a strategic mission that will directly probe the causes of variability in the ionosphere/thermosphere, leading ultimately to a better understanding and predictive capability for the variability in this region. GDC consists of six identical spacecraft, equipped with instrumentation to measure all aspects of the local space environment, including the properties of the ionosphere and thermosphere and the electric and magnetic fields and energetic charged particles that serve as major energy inputs. GDC’s satellites will orbit near 350-400 km altitude, at high inclination, to provide the first-ever comprehensive, global view of the LEO space environment’s variability and the casuses of that variability, on all critical spatiotemporal scales. GDC is currently in formulation, with launch anticipated in the first part of the next decade. In this talk, I will present GDC’s science motivation, planned measurement and sampling strategy.</span></p><p class="MsoNormal"><span style="color:black"><br></span></p><img src="cid:ii_lmimex530" alt="ISWI Sep 2023.png" width="297" height="495"><p class="MsoNormal"><br></p><p class="MsoNormal"><span style="color:black"><br></span></p><p class="MsoNormal"><span style="color:black"><br></span></p></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div>-------------------------------------------</div><div><div><font face="times new roman, serif"><b>Dra. María Graciela Molina</b><br>Associate Professor FACET -UNT </font></div><div><span style="font-family:"times new roman",serif">Researcher CONICET</span></div><div><span style="font-family:"times new roman",serif">Associated researcher INGV</span></div><div><span style="font-family:"times new roman",serif"><br></span></div><div><span style="font-family:"times new roman",serif">Av. Independencia 1800, </span><span style="font-family:"times new roman",serif">Tucumán - Argentina</span><br></div><div><font face="times new roman, serif">
Tel: +54-381-4364093 (ext.7765)<br><a href="mailto:gmolina@herrera.unt.edu.ar" style="font-style:italic" target="_blank">gmolina@herrera.unt.edu.ar</a> /</font></div><div><font face="times new roman, serif"><a href="mailto:m.graciela.molina@gmail.com" target="_blank"><i>m.graciela.molina@gmail.com</i></a></font><br></div></div></div></div></div></div></div></div></div></div></div></div>