1. Identificação | |
Tipo de Referência | Artigo em Revista Científica (Journal Article) |
Site | mtc-m16d.sid.inpe.br |
Código do Detentor | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
Identificador | 8JMKD3MGP7W/3ATQFBS |
Repositório | sid.inpe.br/mtc-m19/2011/12.06.12.49 |
Última Atualização | 2011:12.07.12.54.42 (UTC) administrator |
Repositório de Metadados | sid.inpe.br/mtc-m19/2011/12.06.12.49.19 |
Última Atualização dos Metadados | 2018:06.05.04.25.07 (UTC) administrator |
Chave Secundária | INPE--PRE/ |
DOI | 10.5194/angeo-29-1905-2011 |
ISSN | 0992-7689 |
Chave de Citação | RodriguesPaulChau:2011:Ch15Ec |
Título | On the characteristics of 150-km echoes observed in the Brazilian longitude sector by the 30 MHz São Luís radar |
Projeto | FAPESP 99/00026-0 e 04/01065-0. |
Ano | 2011 |
Mês | Oct |
Data de Acesso | 08 maio 2024 |
Tipo Secundário | PRE PI |
Número de Arquivos | 1 |
Tamanho | 632 KiB |
|
2. Contextualização | |
Autor | 1 Rodrigues, Fabiano da Silveira 2 Paula, Eurico Rodrigues de 3 Chau, J. L. |
Identificador de Curriculo | 1 2 8JMKD3MGP5W/3C9JH2U |
Grupo | 1 DAE-CEA-INPE-MCT-BR 2 DAE-CEA-INPE-MCT-BR |
Afiliação | 1 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 Autor | 1 fabiano@dae.inpe.br 2 eurico@dae.inpe.br 3 frodrigues@astraspace.net |
Endereço de e-Mail | tereza@sid.inpe.br |
Revista | Annales Geophysicae |
Volume | 29 |
Número | 10 |
Páginas | 1905-1916 |
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 Conteúdo | concluido |
Transferível | 1 |
Tipo do Conteúdo | External Contribution |
Tipo de Versão | publisher |
Palavras-Chave | Inonosphere (Equatorial ionosphere) |
Resumo | Abstract. 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. |
Área | CEA |
Arranjo | urlib.net > DIDAE > On the characteristics... |
Conteúdo da Pasta doc | acessar |
Conteúdo da Pasta source | não têm arquivos |
Conteúdo da Pasta agreement | |
|
4. Condições de acesso e uso | |
URL dos dados | http://urlib.net/ibi/8JMKD3MGP7W/3ATQFBS |
URL dos dados zipados | http://urlib.net/zip/8JMKD3MGP7W/3ATQFBS |
Idioma | en |
Grupo de Usuários | administrator tereza@sid.inpe.br |
Visibilidade | shown |
Política de Arquivamento | allowpublisher allowfinaldraft |
Permissão de Leitura | allow from all |
Permissão de Atualização | não transferida |
|
5. Fontes relacionadas | |
Repositório Espelho | sid.inpe.br/mtc-m19@80/2009/08.21.17.02.53 |
Unidades Imediatamente Superiores | 8JMKD3MGPCW/3ETL868 |
Lista de Itens Citando | sid.inpe.br/bibdigital/2013/09.29.20.43 3 |
Divulgação | WEBSCI; PORTALCAPES; MGA; COMPENDEX. |
Acervo Hospedeiro | sid.inpe.br/mtc-m19@80/2009/08.21.17.02 |
|
6. Notas | |
Campos Vazios | alternatejournal 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 |
atualizar | |
|