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<p>This is a gentle reminder of the announcement sent on 20 Aug 2021
on the SCOSTEP/PRESTO Online Seminar as given below........</p>
<p><br>
</p>
<p> </p>
<p>Dear Colleagues, <br>
</p>
<p>Greetings !!<br>
</p>
<p>We are pleased to announce the 9th SCOSTEP/PRESTO online seminar
by Dr. Richard Eastes. <br>
</p>
<p>Seminar Title: Space Weather in the Thermosphere-Ionosphere
System - observations and Insights from the GOLD* Mission
(*Global-scale Observations of the Limb and Disk) <br>
</p>
<p>Speaker: Dr. Richard Eastes <br>
</p>
<p>Affiliation: Laboratory for Atmospheric and Space Physics,
University of Colorado Boulder, USA <br>
</p>
<p>Date/time: September 23, 2021; 14:00-15:00 UT via Zoom<br>
</p>
<p>To join the seminar, please register using the zoom URL given
below (pre-registration is necessary): <a
class="moz-txt-link-freetext"
href="https://us02web.zoom.us/webinar/register/WN_JLX19FwoSRypK_H_2aeYSg">https://us02web.zoom.us/webinar/register/WN_JLX19FwoSRypK_H_2aeYSg</a></p>
<p> </p>
<p class="MsoNormal"><span style="color:#232323">Abstract: <br>
</span></p>
<p class="MsoNormal"><span style="color:#232323">The GOLD mission’s
spatial-temporal observations of thermospheric composition,
density, and temperature, as well as of ionospheric structure
and peak density at low-latitudes, provide an unprecedented
window into space weather in the Thermosphere-Ionosphere (T-I)
system. Imaging the Earth from geostatioary orbit at 47.5</span>°<span
style="color:#232323"> W longitude, the GOLD imager provides
simultaneous images of thermospheric composition (O/N<sub>2</sub>)
and temperature near 160 km on the dayside every 30 minutes from
06:10 to 23:10 UT (03:00-20:00 local time at the satellite). In
addition GOLD images the nighttime equatorial ionization anomaly
(EIA) over the Atlantic and South America every evening.
Observations of geomagnetic storms, solar eclipses, the
nighttime EIA and O<sub>2</sub> density profiles have all
provided unanticipated results. Examples include observations of
“gravity” waves and global-scale responses to weak geomagnetic
activity in the sunlit thermosphere; and in the nighttime EIA,
correlations between peak densities and waves in the mesosphere.
These observations provide tests of our current understanding of
both the T-I system and how it interacts with other regions of
the geospace system. The GOLD mission observations and some of
the implications for space-weather will be discussed.</span></p>
<p class="MsoNormal"><span style="color:#232323">- Duggirala
Pallamraju</span></p>
<p class="MsoNormal"><span style="color:#232323">(On behalf of
Pillar-2 of PRESTO & SCOSTEP leadership)<br>
</span></p>
<p class="MsoNormal"><span style="color:#232323"></span></p>
<div class="moz-signature">-- <br>
<b> Prof. D. Pallamraju </b> <br>
Senior Professor and Dean, PRL <br>
Chairman, Space and Atmospheric Sciences Division, PRL <br>
Physical Research Laboratory, <br>
Navrangpura, Ahmedabad 380 009, INDIA <br>
Email: <a class="moz-txt-link-abbreviated"
href="mailto:raju@prl.res.in">raju@prl.res.in</a>; <a
class="moz-txt-link-abbreviated" href="mailto:dean@prl.res.in">dean@prl.res.in</a>;
URL: <a class="moz-txt-link-freetext"
href="http://www.prl.res.in/~raju/">http://www.prl.res.in/~raju/</a>
<br>
Phone: +91-79-26314658/4863/4861; Fax: +91-79-26314659 </div>
<br>
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