@Article{MoraesVCAPSMFNS:2018:GPAvPo,
author = "Moraes, Alison de O. and Vani, Bruno C. and Costa, Emanoel and
Abdu, Mangalathayil Ali and Paula, Eurico Rodrigues de and
Sousasantos, Jonas and Monico, Jo{\~a}o F. G. and Forte, Biagio
and Negreti, Patr{\'{\i}}cia Mara de Siqueira and Shimabukuro,
Milton Hirokazu",
affiliation = "{Instituto de Aeron{\'a}utica e Espa{\c{c}}o (IAE)} and
Instituto Federal de Educa{\c{c}}{\~a}o, Ci{\^e}ncia e
Tecnologia de S{\~a}o Paulo, Campus Presidente Epit{\'a}cio
(IFSP-PEP) and {Pontif{\'{\i}}cia Universidade Cat{\'o}lica do
Rio de Janeiro (PUC-Rio)} and {Instituto Tecnol{\'o}gico de
Aeron{\'a}utica (ITA)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Instituto Tecnol{\'o}gico de
Aeron{\'a}utica (ITA)} and {Universidade Estadual Paulista
(UNESP)} and {University of Bath} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Universidade Estadual Paulista
(UNESP)}",
title = "GPS availability and positioning issues when the signal paths are
aligned with ionospheric plasma bubbles",
journal = "GPS Solutions",
year = "2018",
volume = "22",
number = "4",
pages = "UNSP 95",
month = "Oct.",
keywords = "Ionospheric scintillation, Fading distribution, GPS
availability.",
abstract = "The propagation paths of signals through equatorial ionospheric
irregularities are analyzed by evaluating their effects on Global
Navigation Satellite System (GNSS) positioning and availability.
Based on observations during 32 days by a scintillation monitor at
So Jos, dos Campos, Brazil, it was noted that there is a dominance
of enhanced scintillation events for Global Positioning System
(GPS) ray paths aligned with the azimuth angle of 345A degrees
(geographic northwest). This azimuth corresponds to the magnetic
meridian that has a large westward declination angle in the region
(21.4AW). Such results suggest that the enhanced scintillation
events were associated with GPS signals that propagated through
plasma bubbles aligned along the direction of the magnetic field.
It will be shown that, under this alignment condition, the longer
propagation path length through plasma bubbles can result in more
severe scintillation cases and more losses of signal lock, as
supported by proposed statistics of bit error probability and mean
time between cycle slips. Additionally, large precise positioning
errors are also related to these events, as demonstrated by
precise point positioning experiments.",
doi = "10.1007/s10291-018-0760-8",
url = "http://dx.doi.org/10.1007/s10291-018-0760-8",
issn = "1080-5370 and 1521-1886",
language = "en",
targetfile = "Moraes_GPS.pdf",
urlaccessdate = "21 maio 2024"
}