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<p class="p1">We would like to solicit contributions to our Fall 2024 AGU session SA021, on topics pertaining to observational (space- and ground-based), modeling, and data analytic studies preparing for the upcoming era of GDC+DYNAMIC. Recent science results
that demonstrate the power of multipoint, multimode observations of the entangled ITM system, as well as advanced modeling and analytic techniques including data assimilation are among the most desired topics. Discussions of both current efforts and plans
for future efforts are welcome.<o:p></o:p></p>
<p class="p2"><o:p> </o:p></p>
<p class="p1">Session Title:<o:p></o:p></p>
<p class="p1">SA021. Science in the GDC and DYNAMIC Era: Assembling a Great Observatory for the ITM<o:p></o:p></p>
<p class="p1"><o:p> </o:p></p>
<p class="p1">Session Description:<o:p></o:p></p>
<p class="p1"><o:p> </o:p></p>
<p class="p1">Understanding the entangled ionosphere-thermosphere (I-T) system requires measurements of all I-T state parameters and magnetospheric energy and momentum inputs, all simultaneously and in a common volume. Multipoint sampling is required to reveal
varying responses to inputs occurring at different spatiotemporal scales.<o:p></o:p></p>
<p class="p1"><o:p> </o:p></p>
<p class="p1">NASA’s Geospace Dynamics Constellation (GDC) will observe global IT responses to solar and magnetospheric inputs. NASA’s concurrent Dynamical Neutral Atmosphere-Ionosphere Coupling (DYNAMIC) mission will leverage GDC’s measurements of magnetospheric
inputs and add observations of momentum, energy, and mass transfer from the lower atmosphere. GDC+DYNAMIC will be a strategic hub for the next-generation ITM Great Observatory.<o:p></o:p></p>
<p class="p1">Presentations in this session will demonstrate our current best understanding of the entangled ITM system, as well as strategies for expanding our knowledge. Of particular interest are presentations about coordinated modeling and multipoint ground-
or space-based observations, past, present, and future.<o:p></o:p></p>
<p class="p1"><o:p> </o:p></p>
<p class="p1">Doug Rowland, Larisa Goncharenko, Jeff Thayer, Katrina Bossert, co-convenors<o:p></o:p></p>
<p class="p2"><span class="apple-converted-space"> </span><o:p></o:p></p>
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