@InProceedings{HernandezMoraPaulPerr:2017:IoScIn,
author = "Hernandez, Felipe Pellegrini and Moraes, Alison de Oliveira and
Paula, Eurico Rodrigues de and Perrella, Waldecir",
affiliation = "EMBRAER and {Instituto de Aeron{\'a}utica e Espa{\c{c}}o (IAE)}
and {Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)}",
title = "Ionospheric scintillation incidence probability for different
levels of solar and magnetic activities over braziliaan
territory",
year = "2017",
organization = "International Congress of the Brazilian Geophysical Sociey, 15.",
abstract = "The navigation and Positioning using satellite became essential in
many areas, for instance in the terrestrial navigation, precise
agriculture, aircraft landing, no manned aircraft control,
petroleum prospection, between many other applications. Many
factors can affect the performance of these navigation systems,
like inclement weather, multipath, the troposphere, the ionosphere
and even jammings. These interferences, depending of their
severity intensity can degrade the positioning systems and even to
interrupt the navigation, what can eventually affect one
substantial number of users. Between the sources of positioning
errors using GPS, the ionosphere in the Brazilian territory is
probably the most important factor that has influence over the
positioning. The ionosphere causes delays and advances in the
carrier and code signal, that result in pseudorange errors.
Besides those effects, the GPS signal, when crossing the
ionospheric bubbles with depleted densitites, suffers variations
in the amplitude and phase, what is named ionospheric
scintillation. The scintillation affects the receiver performance
through signal distortions that produce positioning errors or in
extreme events can interrupt the system operation. In this work it
is presented one ionospheric scintillation analysis of the GPS
signal based on the scintillation occurrence intensity during the
spring and summer solstice for the 2013 to 2016 years. The
analyzed data were obtained from two stations located at
Presidente Prudente and S{\~a}o Jos{\'e} dos Campos, both in the
S{\~a}o Paulo state. These stations are located in a region
suitable for this kind of study since they are located in low
latitude and under the crest of the equatorial ionization anomaly.
The aim of this work is to propose a set of equations to represent
the scintillation occurrence probability in these stations during
two seasons of the year. The input parameters for the proposed
approximations are the Kp index representing the magnetic
intensity and the F10.7 cm representing the solar flux level. The
proposed equations representing the scintillation estimative are
validated not only with Presidente Prudente and S{\~a}o Jos{\'e}
dos Campos data, but also using data from the station of
Inconfidentes in the Minas Gerais state. So this model will allow
users to estimate the expected scintillation night-by-night based
on the Kp and F10.7 values and they will be able to predict its
incidence and consequently to reduce its impact mainly during more
severe scintillation events.",
conference-location = "Rio de Janeiro, RJ",
conference-year = "31 jul. - 03 ago.",
targetfile = "hernandez_ionospheric.pdf",
urlaccessdate = "19 mar. 2024"
}