[Todos] IAFE-COLOQUIOS CIENTIFICOS: Miércoles 25 de marzo de 2015 a las 11:30 hs

["Area Difusión IAFE"]

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                         COLOQUIOS CIENTÍFICOS
                  Instituto de Astronomía y Física del Espacio
                                CONICET-UBA
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"Detecting Interplanetary Dust Particles with radars to study the
dynamics at the edge of the space."

                             Diego Janches
                        NASA/GSFC Space Weather Lab
                   Miércoles 25 de marzo de 2015 a las 11:30 hs.
                           Aula del Edificio IAFE

The Earth´s mesosphere is the region of the atmosphere between ~60-120
km altitude, where the transition from hydrodynamic flow to molecular
diffusion occurs. It is highly dynamic region where turbulence by wave
braking is produced and energy is deposited from sources from both, below
and above this altitude range. Because aircraft and nearly all balloons
reach altitudes below ~50 km and orbital spacecrafts are well above ~400
km, the mesosphere has only been accessed through the use of sounding
rockets or remote sensing techniques, and as a result, it is the most
poorly understood part of the atmosphere. In addition, millions of
Interplanetary Dust Particles (IDPs) enter the atmosphere. Within the
mesosphere most of these IDPs melt or vaporize as a result of collisions
with the air particles producing meteors that can be detected with radars.
This provides a mean to study the dynamics of this region. In this lecture
the basic principles of the utilization of meteor radars to study the
dynamics of the mesosphere will be presented. A system overview of these
systems will be provided as well as discuss the advantages/disadvantages
of these systems, provide details of the data processing methodology and
give a brief overview of the current status of the field as well as the
vision for the next decade.