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MULTISCALE TIME SERIES ANALYSIS OF SCINTILLATION EFFECT IN SATELLITE SIGNALS FROM NON DECIMATED WAVELETS

Grant number: 12/13362-5
Support Opportunities:Scholarships in Brazil - Master
Effective date (Start): October 01, 2012
Effective date (End): July 31, 2014
Field of knowledge:Physical Sciences and Mathematics - Geosciences - Geodesy
Principal Investigator:Eniuce Menezes de Souza
Grantee:Gabriela de Oliveira Nascimento Brassarote
Host Institution: Faculdade de Ciências e Tecnologia (FCT). Universidade Estadual Paulista (UNESP). Campus de Presidente Prudente. Presidente Prudente , SP, Brazil

Abstract

The research of ionospheric scintillation, caused by fluctuations in amplitude and phase of an electromagnetic signal when it passes throw irregularities in ionosphere electronic density, has being very important in Ionosphere and Satellite Positioning areas. This is due to the growing influence of GPS in navigation and remote sensing. Also by the fact of scintillation severely degrade this system performance. There are several gaps to be filled and challenges in the development of an effective method for correction of the scintillation effects in GPS signals, or even for scintillation prediction, mainly for equatorial and low latitudes regions. In this project the objective is to investigate and characterize/modeling the scintillation effect not only by a mathematical perspective, but also statistical, considering for that, the multiscale/multiresolution analysis by non decimated wavelets. It is only possible to propose methodologies and algorithms of correction of scintillation effects in satellite signals if these effects are well characterized in terms of distribution, longitudinal/spatial, cycle and seasonal variations, besides autocorrelations. To evaluated the spatial variation (latitude and longitude) of scintillation effect in equatorial region and low latitudes, all the proposed models and methods will be applied for the stations of CIGALA (Concept for Ionospheric Scintillation Mitigation for Professional GNSS in Latin America) project, whose receivers are the state of art in ionosphere monitoring.

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
NASCIMENTO BRASSAROTE, GABRIELA DE OLIVEIRA; DE SOUZA, ENIUCE MENEZES; GALERA MONICO, JOAO FRANCISCO. S-4 index: Does it only measure ionospheric scintillation?. GPS SOLUTIONS, v. 22, n. 1, . (12/13362-5, 06/04008-2)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
BRASSAROTE, Gabriela de Oliveira Nascimento. Análise multiescala de séries temporais do efeito da cintilação ionosférica nos sinais de satélite GPS a partir de wavelets não decimadas. 2014. Master's Dissertation - Universidade Estadual Paulista (Unesp). Faculdade de Ciências e Tecnologia. Presidente Prudente Presidente Prudente.

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