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1. Identificação
Tipo de ReferênciaArtigo em Revista Científica (Journal Article)
Sitemtc-m16d.sid.inpe.br
Código do Detentorisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Identificador8JMKD3MGP7W/3ATQFBS
Repositóriosid.inpe.br/mtc-m19/2011/12.06.12.49
Última Atualização2011:12.07.12.54.42 (UTC) administrator
Repositório de Metadadossid.inpe.br/mtc-m19/2011/12.06.12.49.19
Última Atualização dos Metadados2018:06.05.04.25.07 (UTC) administrator
Chave SecundáriaINPE--PRE/
DOI10.5194/angeo-29-1905-2011
ISSN0992-7689
Chave de CitaçãoRodriguesPaulChau:2011:Ch15Ec
TítuloOn the characteristics of 150-km echoes observed in the Brazilian longitude sector by the 30 MHz São Luís radar
ProjetoFAPESP 99/00026-0 e 04/01065-0.
Ano2011
MêsOct
Data de Acesso08 maio 2024
Tipo SecundárioPRE PI
Número de Arquivos1
Tamanho632 KiB
2. Contextualização
Autor1 Rodrigues, Fabiano da Silveira
2 Paula, Eurico Rodrigues de
3 Chau, J. L.
Identificador de Curriculo1
2 8JMKD3MGP5W/3C9JH2U
Grupo1 DAE-CEA-INPE-MCT-BR
2 DAE-CEA-INPE-MCT-BR
Afiliação1 Instituto Nacional de Pesquisas Espaciais (INPE)
2 Instituto Nacional de Pesquisas Espaciais (INPE)
3 Inst Geofis Peru, Radio Observ Jicamarca, Lima, Peru
Endereço de e-Mail do Autor1 fabiano@dae.inpe.br
2 eurico@dae.inpe.br
3 frodrigues@astraspace.net
Endereço de e-Mailtereza@sid.inpe.br
RevistaAnnales Geophysicae
Volume29
Número10
Páginas1905-1916
Histórico (UTC)2011-12-06 12:49:19 :: tereza@sid.inpe.br -> administrator ::
2011-12-06 12:49:20 :: administrator -> tereza@sid.inpe.br :: 2011
2011-12-07 12:54:55 :: tereza@sid.inpe.br -> administrator :: 2011
2018-06-05 04:25:07 :: administrator -> tereza@sid.inpe.br :: 2011
3. Conteúdo e estrutura
É a matriz ou uma cópia?é a matriz
Estágio do Conteúdoconcluido
Transferível1
Tipo do ConteúdoExternal Contribution
Tipo de Versãopublisher
Palavras-ChaveInonosphere (Equatorial ionosphere)
ResumoAbstract. We present long-overdue details about the intensity and spectral characteristics of 150-km echoes observed by the S ao Lu ´ ýs radar in Brazil. The S ao Lu ´ ýs observations show that the echoes usually come from multiple scattering layers that descend in altitude before local noon, and ascend during afternoon hours, similar to what has been found in observations made in other longitude sectors. The layers are usually 35 km thick and located, mostly, between 130 and 170 km altitude. The measurements also show variations in echo intensity that are similar to observations made at other equatorial and off-equatorial sites. Analysis of observations made during 2008 shows significant (>37 %) monthly occurrence rates for every month. Reduced occurrence rates were observed around March Equinox. We associate this reduction in occurrence rate, however, to a non-geophysical factor. An increase in the daytime sky noise in the months around March Equinox causes a decrease in the signal-to-noise ratio (SNR) of the echoes, which makes them less distinguishable in our analysis. A higher occurrence of weaker echoes around March Equinox was confirmed by an statistical analysis of the seasonal variation of echo intensities. Strong, long-lasting and, therefore, more noticeable echoing layers, however, were observed between June and early September compared to other months in 2008. Spectral analyses show that most of the echoes have negative mean Doppler shifts indicating upward velocities. The echoes also have narrow spectral widths of only a few ms −1. Finally, we also found that the mean Doppler shift of the observed echoes can vary noticeably with altitude at times. Using spaced antenna measurements we show that this is caused by the wide field-ofview of the radar and the spatial distribution of the scatterers within the radar beam.
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4. Condições de acesso e uso
URL dos dadoshttp://urlib.net/ibi/8JMKD3MGP7W/3ATQFBS
URL dos dados zipadoshttp://urlib.net/zip/8JMKD3MGP7W/3ATQFBS
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Grupo de Usuáriosadministrator
tereza@sid.inpe.br
Visibilidadeshown
Política de Arquivamentoallowpublisher allowfinaldraft
Permissão de Leituraallow from all
Permissão de Atualizaçãonão transferida
5. Fontes relacionadas
Repositório Espelhosid.inpe.br/mtc-m19@80/2009/08.21.17.02.53
Unidades Imediatamente Superiores8JMKD3MGPCW/3ETL868
Lista de Itens Citandosid.inpe.br/bibdigital/2013/09.29.20.43 3
DivulgaçãoWEBSCI; PORTALCAPES; MGA; COMPENDEX.
Acervo Hospedeirosid.inpe.br/mtc-m19@80/2009/08.21.17.02
6. Notas
Campos Vaziosalternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel format isbn label lineage mark nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress readergroup rightsholder schedulinginformation secondarydate secondarymark session shorttitle sponsor subject targetfile tertiarymark tertiarytype typeofwork url
7. Controle da descrição
e-Mail (login)tereza@sid.inpe.br
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