@Article{SahaiJFSATAPALB:2012:EfObEq,
author = "Sahai, Y. and Jesus, R. and Fagundes, P. R. and Selhorst, C. L.
and Abreu, Alessandro Jos{\'e} de and Tulasi Ram, S. and
Aragon-Angel, A. and Pillat, V. G. and Abalde, Jos{\'e} Ricardo
and Lima, W. L. C. and Bittencourt, J. A.",
affiliation = "Universidade Do Vale Do Paraiba (UNIVAP), Physics and Astronomy,
Av Shishima Hifumi 2911, 12244-000 S{\~a}o Jos{\'e} dos Campos,
SP, Brazil and Universidade Do Vale Do Paraiba (UNIVAP), Physics
and Astronomy, Av Shishima Hifumi 2911, 12244-000 S{\~a}o
Jos{\'e} dos Campos, SP, Brazil and Universidade Do Vale Do
Paraiba (UNIVAP), Physics and Astronomy, Av Shishima Hifumi 2911,
12244-000 S{\~a}o Jos{\'e} dos Campos, SP, Brazil and
Universidade Do Vale Do Paraiba (UNIVAP), Physics and Astronomy,
Av Shishima Hifumi 2911, 12244-000 S{\~a}o Jos{\'e} dos Campos,
SP, Brazil and Universidade Do Vale Do Paraiba (UNIVAP), Physics
and Astronomy, Av Shishima Hifumi 2911, 12244-000 S{\~a}o
Jos{\'e} dos Campos, SP, Brazil and Institute of Astronomy and
Astrophysics, Academia Sinica, Taipei, Taiwan and Departmento Do
Mathematica Aplicada, Universitat Polit{\`e}cnica de Catalunya
(UPC), Barcelona, Spain and Universidade Do Vale Do Paraiba
(UNIVAP), Physics and Astronomy, Av Shishima Hifumi 2911,
12244-000 S{\~a}o Jos{\'e} dos Campos, SP, Brazil and
Universidade Do Vale Do Paraiba (UNIVAP), Physics and Astronomy,
Av Shishima Hifumi 2911, 12244-000 S{\~a}o Jos{\'e} dos Campos,
SP, Brazil and Centro Univ Luterano de Palmas (CEULP),
Universidade Luterano Do Brazil (ULBRA), Palmas, TO, Brazil and
{Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Effects observed in the equatorial and low latitude ionospheric
F-region in the Brazilian sector during low solar activity
geomagnetic storms and comparison with the COSMIC measurements",
journal = "Advances in Space Research",
year = "2012",
volume = "50",
number = "10",
pages = "1344--1351",
month = "Nov.",
keywords = "COSMIC satellite, F-region, Geomagnetic storm, Ionosphere, Low
solar activityCorrelation coefficient, Equatorial spread F,
FORMOSAT-3/COSMIC, Geomagnetic storm, Ground based, Ionospheric
parameters, Low latitudes, Magnetic equator, Peak height, Radio
occultations, Solar activity, Space-borne.",
abstract = "The main objective of the present investigation has been to
compare the ionospheric parameters (NmF2 and hmF2) observed by two
ground-based ionospheric sounders (one at PALMAS- located near the
magnetic equator and the other at Sao Jose dos Campos-located in
the low-latitude region) in the Brazilian sector with that by the
satellite FORMOSAT-3/COSMIC radio occultation (RO) measurements
during two geomagnetic storms which occurred in December 2006 and
July 2009 It should be pointed out that in spite of increasing the
latitude (to 10°) and longitude (to 20°) around the stations; we
had very few common observations It has been observed that both
the peak electron density (NmF2) and peak height (hmF2) observed
by two different techniques (space-borne COSMIC and ground-based
ionosondes) during both the geomagnetic storm events compares
fairly well (with high correlation coefficients) at the two
stations in the Brazilian sector It should be pointed out that due
to equatorial spread F (ESF) in the first storm (December 2006)
and no-reflections from the ionosphere during nighttime in the
second storm (July 2009), we had virtually daytime data from the
two ionosondes.",
doi = "10.1016/j.asr.2012.07.006",
url = "http://dx.doi.org/10.1016/j.asr.2012.07.006",
issn = "0273-1177",
label = "self-archiving-INPE-MCTIC-GOV-BR",
language = "en",
targetfile = "1-s2.0-S0273117712004449-main.pdf",
urlaccessdate = "15 jun. 2024"
}