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Metadados

1. Identificação
Tipo de ReferênciaArtigo em Evento (Conference Proceedings)
Sitemtc-m16.sid.inpe.br
Código do Detentorisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Repositóriosid.inpe.br/iris@1916/2006/01.12.12.19
Última Atualização2006:01.12.12.22.00 (UTC) administrator
Repositório de Metadadossid.inpe.br/iris@1916/2006/01.12.12.19.27
Última Atualização dos Metadados2018:06.05.01.20.23 (UTC) administrator
Chave SecundáriaINPE-13315-PRE/8557
Chave de CitaçãoPaulaKantReze:2004:ChGPSi
TítuloCharacteristics of the GPS signal scintillation during ionospheric irregulaties and their effects over the GPS system
FormatoCD-ROM
Ano2004
Data de Acesso23 jun. 2024
Tipo SecundárioPRE CN
Número de Arquivos1
Tamanho2784 KiB
2. Contextualização
Autor1 Paula, Eurico Rodrigues de
2 Kantor, Ivan Jelinek
3 Rezende, L. F. C. de
Identificador de Curriculo1 8JMKD3MGP5W/3C9JH2U
2 8JMKD3MGP5W/3C9JHDQ
Grupo1 DAE-INPE-MCT-BR
Afiliação1 Divisão de Aeronomia
Nome do EventoSimpósio Brasileiro de Engenharia Inercial (SBEIN), 4
Localização do EventoSão José dos Campos
Data17 - 19 nov.
Título do LivroAnais
OrganizaçãoInstituto Nacional de Pesquisas Espaiciais
Histórico (UTC)2006-01-16 15:43:15 :: sergio -> administrator ::
2006-11-09 18:50:25 :: administrator -> sergio ::
2008-01-07 12:53:19 :: sergio -> administrator ::
2018-06-05 01:20:23 :: administrator -> marciana :: 2004
3. Conteúdo e estrutura
É a matriz ou uma cópia?é a matriz
Estágio do Conteúdoconcluido
Transferível1
Tipo do ConteúdoExternal Contribution
ResumoThe ionospheric irregularities can give origin to amplitude and phase scintillations in the GPS signal and can affect telecommunication systems. In this work we present briefly the physical mechanisms that give origin to the ionospheric irregularities, and their dependence with season, local time, solar activity and magnetic activity. Following we will describe the potential effects of the scintillations on the GPS systems, like the loss of lock, increase of the dilution of precision (DOP), decrease on the available number of GPS satellites and effects on the WAAS (Wide Area Augmentation System) navigation and positioning system. This study was based on L1 (1.575 GHz) GPS signal amplitude scintillations measured by an array of 11 Scintillation Monitors located over the Brazilian territory. The GPS data were recorded at 50 samples/sec and the scintillation index S4 was used to quantify the scintillation intensity. Over the Brazilian territory the ionospheric irregularities incidence is normally from September to March, however they can be triggered at any month of the year during the incidence of a magnetic storm. The ionospheric irregularities incidence and intensity increase with the increase of the solar cycle. The irregularities are generated at equatorial region after sunset due to plasma instability processes and they occur in the pre-midnight time sector and after midnight during some magnetic storms. The ionospheric irregularity amplitudes are largely dependent of the ionospheric background ionization and over the Brazilian territory there are large ionization gradients from equator to low latitudes due to the Equatorial Anomaly. Due to this anomaly the Total Electron Content (TEC) presents 2 peaks at about 15o S and 15 o N of magnetic latitude and a decrease at equatorial latitudes, and as a consequence the ionospheric irregularities give origin to larger amplitudes close to these crests. For instance stations like São José dos Campos and Cachoeira Paulista are under the Equatorial Anomaly peaks. The ionospheric irregularities can cause large fades on the GPS signal for stationary receivers that can cause losses of lock (tracking) that can persist for tens of seconds. As the ionospheric irregularity patterns (bubbles) drift in the east-west direction with about 150 m/s, for moving receivers like landing aircrafts, which have almost same velocity, the fades can be potentially much longer causing even longer tracking losses. In this work we show some statistics of loss of lock occurrence during ionospheric irregularities. One consequence of tracking loss is an increase in the dilution of precision due to the GPS satellite loosing, what increases the navigation errors. In severe conditions of irregularities incidence the number of tracked satellites may fall below 4 that is the minimum amount for calculating navigational solutions.
ÁreaCEA
Arranjourlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDAE > Characteristics of the...
Conteúdo da Pasta docacessar
Conteúdo da Pasta sourcenão têm arquivos
Conteúdo da Pasta agreementnão têm arquivos
4. Condições de acesso e uso
URL dos dadoshttp://urlib.net/ibi/sid.inpe.br/iris@1916/2006/01.12.12.19
URL dos dados zipadoshttp://urlib.net/zip/sid.inpe.br/iris@1916/2006/01.12.12.19
Idiomapt
Arquivo AlvoDe Paula et Rodrigues et Kantor.pdf
Grupo de Usuáriosadministrator
sergio
Visibilidadeshown
Detentor da CópiaSID/SCD
5. Fontes relacionadas
Unidades Imediatamente Superiores8JMKD3MGPCW/3ETL868
Lista de Itens Citandosid.inpe.br/mtc-m21/2012/07.13.14.45.35 3
sid.inpe.br/mtc-m21/2012/07.13.14.50.28 1
Acervo Hospedeirosid.inpe.br/banon/2003/08.15.17.40
6. Notas
Campos Vaziosarchivingpolicy archivist callnumber copyright creatorhistory descriptionlevel dissemination documentstage doi e-mailaddress edition editor electronicmailaddress identifier isbn issn keywords label lineage mark mirrorrepository nextedition notes numberofvolumes orcid pages parameterlist parentrepositories previousedition previouslowerunit progress project publisher publisheraddress readergroup readpermission rightsholder schedulinginformation secondarydate secondarymark serieseditor session shorttitle sponsor subject tertiarymark tertiarytype type url versiontype volume
7. Controle da descrição
e-Mail (login)marciana
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