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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

GPS availability and positioning issues when the signal paths are aligned with ionospheric plasma bubbles

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Moraes, Alison de O. [1] ; Vani, Bruno C. [2] ; Costa, Emanoel [3] ; Abdu, Mangalathayil A. [4] ; de Paula, Eurico R. [5] ; Sousasantos, Jonas [6] ; Monico, Joao F. G. [7] ; Forte, Biagio [8] ; de Siqueira Negreti, Patricia Mara [5] ; Shimabukuro, Milton Hirokazu [7]
Total Authors: 10
[1] ITA, IAE, Sao Jose Dos Campos, SP - Brazil
[2] Inst Fed Educ Ciencia & Tecnol Sao Paulo, Campus Presidente Epitacio IFSP PEP, Presidente Epitacio, SP - Brazil
[3] Pontificia Univ Catolica Rio de Janeiro CETUC PUC, Ctr Estudos Telecomunicacoes, Rua Marques de Sao Vicente 225, BR-22451900 Rio De Janeiro, RJ - Brazil
[4] INPE, ITA, Sao Jose Dos Campos, SP - Brazil
[5] INPE, Sao Jose Dos Campos, SP - Brazil
[6] ITA, Sao Jose Dos Campos - Brazil
[7] Univ Estadual Paulista Julio de Mesquita Filho UN, Presidente Prudente, SP - Brazil
[8] Univ Bath, Bath, Avon - England
Total Affiliations: 8
Document type: Journal article
Source: GPS SOLUTIONS; v. 22, n. 4 OCT 2018.
Web of Science Citations: 6

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. (AU)

FAPESP's process: 17/50115-0 - GNSS technology for supporting aerial navigation
Grantee:Joao Francisco Galera Monico
Support type: Research Grants - Research in Public Policies
FAPESP's process: 06/04008-2 - GNSS: investigations and applications in geodetic positioning, in studies related to the atmosphere and precision agriculture
Grantee:Joao Francisco Galera Monico
Support type: Research Projects - Thematic Grants