CEDAR email: [rescheduled] ISWI seminar will take place tomorrow 27th at 4 PM Central European Time (10 AM EDT; 7:30 PM IST)

[Maria Graciela Molina]

Dear colleagues,

Due to some logistic problems tomorrow's seminar will be rescheduled 1 hour
after to *September 27th at 4 PM Central European Time (10 AM EDT; 7:30 PM
IST)*.
To register for the *virtual seminar*, please send an email to:
*iswisupport at bc.edu
<iswisupport at bc.edu>.* Please include “ISWI Seminar Registration” in the
subject line and we will send the connection details.

Looking forward to meeting you tomorrow!
With kind regards,

Graciela Molina
on behalf of the ISWI Seminar Committee


***********************************************
*Title:* NASA’s Geospace Dynamics Constellation: Exploring our Connected
Atmosphere

*Speaker:* Dr Doug Rowland

*Abstract:*

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.

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.
-------------------------------------------
*Dra. María Graciela Molina*
Associate Professor FACET -UNT
Researcher CONICET
Associated researcher INGV

Av. Independencia 1800, Tucumán - Argentina
Tel: +54-381-4364093 (ext.7765)
gmolina at herrera.unt.edu.ar /
*m.graciela.molina at gmail.com* <m.graciela.molina at gmail.com>
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