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

Autor(es)

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]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: GPS SOLUTIONS; v. 22, n. 4 OCT 2018.
• Citações Web of Science: 9

Resumo

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)

• Processo FAPESP: 06/04008-2 - GNSS: investigações e aplicações no posicionamento geodésico, em estudos relacionados com a atmosfera e na agricultura de precisão
• Beneficiário: Joao Francisco Galera Monico
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 17/50115-0 - INCT 2014: tecnologia GNSS no suporte à navegação aérea
• Beneficiário: Joao Francisco Galera Monico
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisa em Políticas Públicas