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Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Posicionamento por GPS na região brasileira durante a intensa tempestade geomagnética de 29 de outubro de 2003
The error due to the ionosphere in the GPS observables depends on the Total Electron Content (TEC) in the ionospheric layer. The TEC varies regularly in time and space in relation to the sunspot number, the season, the local time, the geographic position, and others. However, the TEC can suffer abrupt modifications in its behavior due to the occurrence of in
Publicado em: 2010
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2. Estudo da ionosfera da região brasileira com dados dos satélites FORMOSAT-3/COSMIC e de Digissondas / Study of Brazilian region ionosphere using data from the FORMOSAT-3/COSMIC Satellites and Digisondes
Este trabalho visa melhorar o estudo da ionosfera da região brasileira com a utilização de dados da constelação de satélites FORMOSAT-3/COSMIC que fornece dados globais da atmosfera quase em tempo real. Os dados ionosféricos destes satélites permitem a construção de mapas dos parâmetros para monitorar o desenvolvimento e a manutenção das estrutu
Publicado em: 2010
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3. Estudo de irregularidades ionosféricas em períodos de baixa ocorrência em baixas latitudes sob condições calmas / Studies of low-latitude ionospheric irregularities during the periods of their low frequency of occurrence, and under quiet conditions
This thesis research focalises a study of the mechanisms involved in the generation and evolution of the ionospheric plasma bubbles by means of experimental data and modeling. The experimental data were obtained by night airglow (OI630nm) imagers and Digisondes. The airglow allsky imager was located at São João do Cariri (7,5°S, 36,5°O, I=-20°), and the
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/11/2005
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4. Studies of low-latitude ionospheric irregularities during the periods of their low frequency of occurrence, and under quiet conditions / Estudo de irregularidades ionosféricas em períodos de baixa ocorrência em baixas latitudes sob condições calmas
This thesis research focalises a study of the mechanisms involved in the generation and evolution of the ionospheric plasma bubbles by means of experimental data and modeling. The experimental data were obtained by night airglow (OI630nm) imagers and Digisondes. The airglow allsky imager was located at São João do Cariri (7,5°S, 36,5°O, I=-20°), and the
Publicado em: 2005
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5. Estudo das irregularidades ionosféricas equatoriais utilizando sinais GPS / Global positioning system studies of equatorial ionospheric irregularities
Signals transmitted by the Global Positioning System (GPS) satellites were used to study equatorial ionospheric irregularities over Brazil. GPS (L1=1.575 GHz) scintillation data were used to infer the occurrence of ~400m scale-size irregularities and compared with equatorial Spread F (ESF) observations carried out by several other instruments like VHF cohere
Publicado em: 2003