@PhDThesis{Odriozola:2017:EsIrPl,
author = "Odriozola, Siomel Savio",
title = "Estudo de irregularidades do plasma ionosf{\'e}rico na
regi{\~a}o entre as camadas E e F no setor brasileiro a partir de
medidas de foguete",
school = "Instituto Nacional de Pesquisas Espaciais (INPE)",
year = "2017",
address = "S{\~a}o Jos{\'e} dos Campos",
month = "2016-10-20",
keywords = "ionosfera equatorial, irregularidades do plasma, sonda do Langmuir
a bordo do foguete, densidade eletr{\^o}nica, temperatura
eletr{\^o}nica, equatorial ionosphere, ionospheric plasma
irregularities, Langmuir probe onboard a rocket, electronic
density, electronic temperature.",
abstract = "O estudo das irregularidades do plasma ionosf{\'e}rico na
regi{\~a}o equatorial, tem contribu{\'{\i}}do para o
entendimento espec{\'{\i}}fico de fen{\^o}menos da ionosfera
nessa regi{\~a}o. Dentre os diferentes instrumentos que fazem
medidas nesta parte da atmosfera, destacam-se aqueles a bordo de
foguetes, pois realizam medi{\c{c}}{\~o}es in situ de
importantes par{\^a}metros ionosf{\'e}ricos. Nesta tese, {\'e}
feito um estudo das irregularidades do plasma da ionosfera
equatorial sobre parte do territ{\'o}rio brasileiro, usando
medidas do lan{\c{c}}amento do foguete a partir de Alc{\^a}ntara
(2,4\$^{o}\$S, 44,4\$^{o}\$W, latitude dip 5,5\$^{o}\$S),
Brasil, em 12 de dezembro do 2012 {\`a}s 19 h (hora local) em
conjunto com medidas feitas com digissondas localizadas em
S{\~a}o Lu{\'{\i}}s (2,6\$^{o}\$S, 44,2\$^{o}\$W, latitude
dip 6\$^{o}\$S) e Fortaleza (3,9\$^{o}\$S, 38,4\$^{o}\$ W,
latitude dip 14,9\$^{o}\$S), e imagens obtidas com o imageador
tipo All-Sky instalado em S{\~a}o Jo{\~a}o do Cariri
(7,4\$^{o}\$S, 36, 5\$^{o}\$ W, latitude dip 22,
9\$^{o}\$S). Como resultados deste trabalho s{\~a}o obtidos os
perfis com a altitude da densidade eletr{\^o}nica entre as
camadas E (90 km) e F (at{\'e} 430 km); s{\~a}o estimados os
perfis com a altura da temperatura eletr{\^o}nica na regi{\~a}o
entre as camadas E e F (100 - 325 km); e {\'e} feita uma
an{\'a}lise espectral das flutua{\c{c}}{\~o}es das medidas de
densidade eletr{\^o}nica a diferentes alturas ao longo da
trajet{\'o}ria do foguete. A principal contribui{\c{c}}{\~a}o
desta tese {\'e} a detec{\c{c}}{\~a}o e
carateriza{\c{c}}{\~a}o de um tipo de irregularidade do plasma
ionosf{\'e}rico pouco estudado e que n{\~a}o havia sido
detectado at{\'e} agora com medi{\c{c}}{\~o}es in situ, e ainda
sem uma denomina{\c{c}}{\~a}o apropriada na literatura
cient{\'{\i}}fica. Estas irregularidades tinham sido detetadas
at{\'e} agora por medidas de radares de espalhamento coerente na
regi{\~a}o E e no vale entre as camadas E e F pr{\'o}ximo ao
equador geomagn{\'e}tico. Elas se manifestaram como
estria{\c{c}}{\~o}es quase peri{\'o}dicas dos ecos obtidos pelo
radar. Al{\'e}m da an{\'a}lise dos dados, para uma melhor
compreens{\~a}o deste fen{\^o}meno, foi feita uma
simula{\c{c}}{\~a}o num{\'e}rica para entender a
influ{\^e}ncia do campo el{\'e}trico de polariza{\c{c}}{\~a}o
fora da bolha de plasma na gera{\c{c}}{\~a}o destas
irregularidades. As simula{\c{c}}{\~o}es reproduzem
aproximadamente as observa{\c{c}}{\~o}es e o perfil com a altura
da densidade eletr{\^o}nica, sendo uma outra
contribui{\c{c}}{\~a}o, de um ponto de vista te{\'o}rico, desta
tese. ABSTRACT: The study of ionospheric plasma irregularities in
the equatorial region, has contributed to the understanding of
specific ionospheric phenomena in that region. Among the different
instruments that measure this part of the atmosphere, those on
board rockets are highlighted, as those carry out in-situ
measurements of important ionospheric parameters. In this thesis,
a study of plasma irregularities in the equatorial ionosphere over
the Brazilian territory is made, using rocket measurements from
Alc{\^a}ntara (2.4\$^{o}\$S, 44.4\$^{o}\$ W, dip latitude
5.5\$^{o}\$S), Brazil, on December 12, 2012 at 19 h (local time)
together with measurements made by Digisondes located at S{\~a}o
Lu{\'{\i}}s (2.6\$^{o}\$S, 44.2\$^{o}\$W, dip latitude
6\$^{o}\$ S) and Fortaleza (3.9\$^{o}\$S, 38.4\$^{o}\$W, dip
latitude 14.9\$^{o}\$S), and images obtained with an All-Sky
imager installed at S{\~a}o Jo{\~a}o do Cariri (7.4\$^{o}\$S,
36.5\$^{o}\$ W, dip latitude 22.9\$^{o}\$S). As results of
this work, the height profiles of electron density between the E
(90 km) and F (up to 430 km) layers are obtained; the height
profiles of electronic temperature in the region between the E and
F layers (100 - 325 km) are estimated; and spectral analysis of
the measured electron density fluctuations are made at different
heights along the rocket trajectory. The main contribution of this
thesis is the detection and characterization of a type of
ionospheric plasma irregularity little studied and that had not
been detected so far with in-situ measurements, and still without
a proper denomination in the scientific literature. These
irregularities have been detected, so far, by coherent backscatter
radar measurements at E region and the valley between the E and F
layers near the geomagnetic equator. This irregularities are
observed as quasiperiodic striations of the echoes obtained by the
radar. In addition to the data analysis for a better understanding
of this phenomenon, a numerical simulation is carried out to
understand the influence of the polarization electric field
outside the plasma bubble (fringe field) in the generation of
these irregularities. The simulations approximately reproduces the
observations and the height profiles of electron density. This
being another contribution, from a theoretical point of view, of
this thesis.",
committee = "Alves, Maria Virginia (presidente) and Pimenta, Alexandre Alvares
(orientador) and Muralikrishna, Polinaya (orientador) and Paula,
Eurico Rodrigues de and Borba, Gilvan Luiz and Nogueira, Paulo
Alexandre Bronzato",
copyholder = "SID/SCD",
englishtitle = "Study of ionosphere plasma irregularities in the region between E
and F layers at the Brazilian sector from rocket-borne
measurements.",
language = "pt",
pages = "250",
ibi = "8JMKD3MGP3W34P/3MHF9DS",
url = "http://urlib.net/ibi/8JMKD3MGP3W34P/3MHF9DS",
targetfile = "publicacao.pdf",
urlaccessdate = "28 abr. 2024"
}