Decade of Sporadic Meteoroid Mass Distribution Indices in the Southern Hemisphere Derived from SAAMER’s Meteor Observations

We present determinations of the meteoroid differential mass index, s, using over a decade of meteor observations from the Southern Argentina Agile MEteor Radar (SAAMER). For this, we employ an autonomous statistical technique to determine this parameter from the measured radar echo amplitudes. Unli...

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Detalles Bibliográficos
Autores principales: Janches, Diego, Brunini, Claudio Antonio, Hormaechea, José Luis
Formato: Articulo
Lenguaje:Inglés
Publicado: 2019
Materias:
Ciencias Astronómicas
meteorites,
data analysis
observation
radar astronomy
zodiacal dust
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/159481
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-159481
record_format dspace
spelling I19-R120-10915-1594812023-10-27T20:30:56Z http://sedici.unlp.edu.ar/handle/10915/159481 Decade of Sporadic Meteoroid Mass Distribution Indices in the Southern Hemisphere Derived from SAAMER’s Meteor Observations Janches, Diego Brunini, Claudio Antonio Hormaechea, José Luis 2019 2023-10-27T14:42:23Z en Ciencias Astronómicas meteorites, data analysis observation radar astronomy zodiacal dust We present determinations of the meteoroid differential mass index, s, using over a decade of meteor observations from the Southern Argentina Agile MEteor Radar (SAAMER). For this, we employ an autonomous statistical technique to determine this parameter from the measured radar echo amplitudes. Unlike previous studies, we examine the role of the system noise in the determination of this parameter and found that if not taken into account appropriately, the results can yield significant over estimations of the mass index. In general we found that a value of s = 2.0 represents SAAMER's results in general agreement with recent studies performed in the northern hemisphere. We explore both the index interannual and seasonal variability and, unlike previous studies, we found them to be constant, except during the presence of the Southern δ Aquariids meteor shower which is so strong that it dominates the meteor counts when present. Our study suggests that using the maximum echo amplitude for these studies is not ideal as it can be biased by many factors which make the inaccuracies larger than the precision estimated by the fitting routine. A method that results in a more direct estimate of the electron line density would be required which takes into account range, gain pattern, system noise, etc. Facultad de Ciencias Astronómicas y Geofísicas Articulo Articulo http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
meteorites,
data analysis
observation
radar astronomy
zodiacal dust
spellingShingle Ciencias Astronómicas
meteorites,
data analysis
observation
radar astronomy
zodiacal dust
Janches, Diego
Brunini, Claudio Antonio
Hormaechea, José Luis
Decade of Sporadic Meteoroid Mass Distribution Indices in the Southern Hemisphere Derived from SAAMER’s Meteor Observations
topic_facet Ciencias Astronómicas
meteorites,
data analysis
observation
radar astronomy
zodiacal dust
description We present determinations of the meteoroid differential mass index, s, using over a decade of meteor observations from the Southern Argentina Agile MEteor Radar (SAAMER). For this, we employ an autonomous statistical technique to determine this parameter from the measured radar echo amplitudes. Unlike previous studies, we examine the role of the system noise in the determination of this parameter and found that if not taken into account appropriately, the results can yield significant over estimations of the mass index. In general we found that a value of s = 2.0 represents SAAMER's results in general agreement with recent studies performed in the northern hemisphere. We explore both the index interannual and seasonal variability and, unlike previous studies, we found them to be constant, except during the presence of the Southern δ Aquariids meteor shower which is so strong that it dominates the meteor counts when present. Our study suggests that using the maximum echo amplitude for these studies is not ideal as it can be biased by many factors which make the inaccuracies larger than the precision estimated by the fitting routine. A method that results in a more direct estimate of the electron line density would be required which takes into account range, gain pattern, system noise, etc.
format Articulo
Articulo
author Janches, Diego
Brunini, Claudio Antonio
Hormaechea, José Luis
author_facet Janches, Diego
Brunini, Claudio Antonio
Hormaechea, José Luis
author_sort Janches, Diego
title Decade of Sporadic Meteoroid Mass Distribution Indices in the Southern Hemisphere Derived from SAAMER’s Meteor Observations
title_short Decade of Sporadic Meteoroid Mass Distribution Indices in the Southern Hemisphere Derived from SAAMER’s Meteor Observations
title_full Decade of Sporadic Meteoroid Mass Distribution Indices in the Southern Hemisphere Derived from SAAMER’s Meteor Observations
title_fullStr Decade of Sporadic Meteoroid Mass Distribution Indices in the Southern Hemisphere Derived from SAAMER’s Meteor Observations
title_full_unstemmed Decade of Sporadic Meteoroid Mass Distribution Indices in the Southern Hemisphere Derived from SAAMER’s Meteor Observations
title_sort decade of sporadic meteoroid mass distribution indices in the southern hemisphere derived from saamer’s meteor observations
publishDate 2019
url http://sedici.unlp.edu.ar/handle/10915/159481
work_keys_str_mv AT janchesdiego decadeofsporadicmeteoroidmassdistributionindicesinthesouthernhemispherederivedfromsaamersmeteorobservations
AT bruniniclaudioantonio decadeofsporadicmeteoroidmassdistributionindicesinthesouthernhemispherederivedfromsaamersmeteorobservations
AT hormaecheajoseluis decadeofsporadicmeteoroidmassdistributionindicesinthesouthernhemispherederivedfromsaamersmeteorobservations
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