Artigo
Extended ionospheric amplitude scintillation model for GPS receivers
Registro en:
Radio Science. Washington: Amer Geophysical Union, v. 49, n. 5, p. 315-329, 2014.
0048-6604
10.1002/2013RS005307
WOS:000337624700002
7180879644760038
Autor
Moraes, Alison de Oliveira
Costa, Emanoel
Paula, Eurico Rodrigues de
Perrella, Waldecir Joao
Galera Monico, Joao Francisco [UNESP]
Resumen
Ionospheric scintillation is a phenomenon that occurs after sunset, especially in the low-latitude region, affecting radio signals that propagate through the ionosphere. Depending on geophysical conditions, ionospheric scintillation may cause availability and precision problems to Global Navigation Satellite System users. The present work is concerned with the development of an extended model for describing the effects of the amplitude ionospheric scintillation on GPS receivers. Using the - probabilistic model, introduced by previous authors in different contexts, the variance of GPS receiver tracking loop error may be estimated more realistically. The proposed model is developed with basis on the - parameters and also considering correlation between amplitude and phase scintillation. Its results are interpreted to explain how a receiver may experience different error values under the influence of ionospheric conditions leading to a fixed scintillation level S4. The model is applied to a large experimental data set obtained at SAo Jose dos Campos, Brazil, near the peak of the equatorial anomaly during high solar flux conditions, between December 2001 and January 2002. The results from the proposed model show that depending on the - pair, moderate scintillation (0.5S40.7) may be an issue for the receiver performance. When S4>0.7, the results indicate that the effects of scintillation are serious, leading to a reduction in the receiver availability for providing positioning solutions in approximately 50% of the cases. Instituto de Aeronautica e Espaco INPE ITA AFOSR Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Galileo FP7 RD program IAE, Sao Paulo, Brazil Pontificia Univ Catolica Rio de Janeiro CETUC PUC, Ctr Estudos Telecomunicacoes, Rio De Janeiro, Brazil INPE, Sao Paulo, Brazil ITA, Sao Jose Dos Campos, SP, Brazil Univ Estadual Paulista Julio de Mesquita Filho UN, Sao Paulo, Brazil Univ Estadual Paulista Julio de Mesquita Filho UN, Sao Paulo, Brazil AFOSRFA9550-12-1-0031 AFOSRFA9550-10-1-0564 CNPq: 305684/2010-8 FAPESP: 06/04008-2