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<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 19.2px; background-color: rgb(255, 255, 255);">Dear Colleagues,</span>
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This e-mail is to bring to your attention the following session at CEDAR.<br>
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<strong>Workshop Name</strong>: Meteoroids and Space Debris<br>
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<strong>Date</strong>: Thursday June 28, 2018<br>
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<strong>Time</strong>: 16:00-18:00<br>
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<strong>Location</strong>: Mesa B/Hilton<strong></strong><br>
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<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 19.2px; background-color: rgb(255, 255, 255);">We are looking for short presentations and are also planning time for discussion about Meteoroids and Space Debris within the context
of CEDAR science, societal impacts, and overlap with other disciplines . Please let us know if you would like to give a short presentation and/or if you have a question/topic you would like us to address/discuss during this session.</span><br>
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<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 19.2px; background-color: rgb(255, 255, 255);">A full description can be seen here: <a href="http://cedarweb.vsp.ucar.edu/wiki/index.php/2018_Workshop:Meteoroids_and_Space_Debris">http://cedarweb.vsp.ucar.edu/wiki/index.php/2018_Workshop:Meteoroids_and_Space_Debris</a></span></div>
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<span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 19.2px; background-color: rgb(255, 255, 255);">A short </span><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 19.2px; background-color: rgb(255, 255, 255);">description
of the workshop is provided </span><span style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 19.2px; background-color: rgb(255, 255, 255);">below</span>.<br>
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Looking forward to seeing you all in Santa Fe!<br>
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Thank you,<br>
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Julio Urbina (jvu1@psu.edu)<br>
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Sigrid Close (sigridc@stanford.edu) <br>
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<strong style="font-size: 24pt;">CEDAR Meteoroids and Space Debris Workshop</strong><br style="font-size: 24pt;">
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<span class="mw-headline" id="Justification">Justification</span></h3>
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<span style="font-size: 22.86px;">This workshop addresses the CEDAR Strategic Thrust #2: Explore Exchange Processes at Boundaries and Transitions in Geospace, in particular, viewing Earth-Atmosphere-Geospace coupling and interactions as a complete and interactive
system, meteors contribute across a wide range of spatial and temporal scales as both a driver and catalyst of significance to microphysics and phenomena.</span><br>
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Meteors are routinely observed using a wide array of observational techniques in both the neutral and plasma environment and can be used as a tracer to study background parameters such as neutral winds, temperatures and tides. Many open questions exist in the
meteor field. These range from gaps in fundamental understanding such as 1) what is the scatter process that results in radar observed meteor head echoes?, 2) what is the mass loading of the upper atmosphere by meteor ablation and why do estimates very so
drastically?, 3) what is the relationship between meteor properties defined by the meteor input function and atmospheric phenomena tied to meteors? As with any study that uses the tools of system dynamics and system science one must first define the system
(i.e. defining the boundaries, inputs and outputs in a thermodynamic system) and then make the simplifying assumptions that yield the relevant physics to the problem at hand. For meteor related studies, this system definition has often been implicit and related
to boundaries defined by meteor ablation heights. But, as our measurement capability and knowledge increases regarding the SMC, we continue to push these traditional boundaries to uncover new insight into the processes, drivers, and feedbacks related to meteors
within the Earth-Atmosphere-Geospace system allowing us to learn more about the coupling and interactions that can be uncovered using meteor science.<br>
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<span class="mw-headline" id="Description">Description</span></h3>
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A meteoroid is defined as a small, solid extraterrestrial object. Upon entry into a planet’s atmosphere, it heats and ablates off particles that then collide with the background neutrals, forming a dense plasma that extends around the meteoroid as well as behind
it. These plasmas, referred to as meteors, have been studied for well over a century, yet many outstanding questions remain. In addition, space debris, also known as orbital debris, space junk, and space waste, is the collection of objects in orbit around
Earth that were created by humans but no longer serve any useful purpose. These artificial meteors/Debris and meteoroids of astronomic origin are a long-standing threat to satellites, and both contribute to the flux of macroscopic particles into Earth's atmosphere.
To address the outstanding questions currently under investigation in the field of meteor, meteoroid and debris science and engineering, we invite presentations on the physics of meteoroid and debris particles and their impacts effects on the atmosphere, ionosphere,
and satellites. We also encourage presentations that address the engineering techniques for observing and characterizing the meteoroid and debris population, including any observational (i.e. lidar, radar, satellite and optical) or modeling method.<br>
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