| 1. Identificação | |
| Tipo de Referência | Artigo em Revista Científica (Journal Article) |
| Site | mtc-m12.sid.inpe.br |
| Código do Detentor | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identificador | 6qtX3pFwXQZ3r59YD6/GP48q |
| Repositório | sid.inpe.br/iris@1912/2005/07.20.00.11 |
| Última Atualização | 2015:11.26.15.38.31 (UTC) marciana |
| Repositório de Metadados | sid.inpe.br/iris@1912/2005/07.20.00.11.20 |
| Última Atualização dos Metadados | 2018:06.05.00.52.29 (UTC) administrator |
| Chave Secundária | INPE-6526-PRE/2565 |
| ISSN | 1517-3275 |
| Rótulo | 6186 |
| Chave de Citação | MorelliFormEpip:1993:InGeVi |
| Título | Influencia da geometria de visada na reflectancia espectral de duas gramineas forrageiras  |
| Ano | 1993 |
| Mês | set. |
| Data de Acesso | 29 abr. 2024 |
| Tipo Secundário | PRE PN |
| Número de Arquivos | 1 |
| Tamanho | 3154 KiB |
| 2. Contextualização | |
| Autor | 1 Morelli, Ademir Fernando 2 Formaggio, Antonio Roberto 3 Epiphanio, Jose Carlos Neves |
| Grupo | 1 DSR-INPE-MCT-BR |
| Revista | Revista UNIVAP |
| Volume | 1 |
| Número | 1 |
| Páginas | 27-42 |
| Histórico (UTC) | 2008-06-09 19:15:39 :: administrator -> jefferson :: 2010-07-07 18:50:32 :: jefferson -> administrator :: 2012-10-14 15:45:06 :: administrator -> marciana :: 1993 2013-03-05 18:09:29 :: marciana -> administrator :: 1993 2013-09-14 00:22:47 :: administrator -> marciana :: 1993 2015-11-26 15:38:31 :: marciana -> administrator :: 1993 2018-06-05 00:52:29 :: administrator -> marciana :: 1993 |
| 3. Conteúdo e estrutura | |
| É a matriz ou uma cópia? | é a matriz |
| Estágio do Conteúdo | concluido |
| Transferível | 1 |
| Tipo do Conteúdo | External Contribution |
| Resumo | The objective of this research was to evaluate the influence's valuation of view geometry variation in spectral behavior of herbaceous vegetation and soil, underlying in composition pastures for Brachiaria decumbens Stapf. cv. Basilisk Stapf and Brachiaria brizantha Stapf. cv. Marandu. The methodology development involved the report analysis between the spectral reflectance and the biophysics parameters of herbaceous vegetation and soil. For this purpose radiometric and biophysics measurements were done for 25 vegetation samples andone soil sample, in experiment areas of 1000 m2, for each species. The multispectral bidirectional reflectance measurements (500 to 1100 nm)were obtained in the view zenith angles ( v)of 0 , 15 , 30 , 45 and 60 for three sectors of azimutal plain ( v=0 , 90 and 180 ), with the solar zenith angle variation controlled for an amplitude of the 10 ( s=45 to 55 ) and the solar azimutal variation compensated in the acquisition method. The following vegetation parameters were measured: fresh and dry biomass, fresh and dry green biomass, droughtry biomass and leaf and stems; water content of total, green and droughtry biomassa, Leaf Area Index (LAI)and percentage of canopy cover. The soil parameters available were color, roughness and chemistry composition. This research intent was the comprehension of physical mechanisms involved in the directional reflectance factor distribution of complete homogeneous vegetation canopies and its influences in the relation between spectral behavior and vegetation parameters. The general scattering behavior was coherent with the dinamics observed in the literature and wassupported by two principal phenomena: the "phase function" and "geometric effect 1". The major trends observed in the reflectance factor ocurred in the azimuth in the principal plane of the sun ( s=0 and 180 ), while the minor trends ocurred in the azimuth direction perpendicular to the principal plane of the sun ( s=90 ). For all view angles and spectral bands the minimum reflectance ocurred near nadir ( v=0 ) and increased with increasing view zenith angles for all azimuth directions. This trend is caused by the shading of flower canopy layers, by components in the upper layers and by viewing different proportions of the layer components as the view angle changes ("effect 1"). In some cases by an additional effect of "phase function", the reflectance minimum was shifted slightly off-nadir in the foward scattering direction ( s=0 ). This shift was maximized for ocurrence of reproductive structures in the top layers of cover, because this structure is vertical and opaque. The near infra-red band was less influenced by view geometry variation than in the spectral bands of visible, because in the near infra-red band the transmitance was nearly equal to the reflectance for most structural components of herbaceous vegetation, while in the visible the reflectance is major, consequentely the "effect 1" is maximized. The major information content about vegetation cover was obtained in the principal plane of the sun, in the backscattering direction ( =180 ), than showed better relationships to the vegetation parameters, because of the ocurrence of "hot spot". The vegetation parameters of prodution and water content showed the best correlations, because its parameters have more association to the near infra-red, that exbited the better performance than visible bands, more associated to LAI and fresh and dry biomass components. The "effect 1" was the dominant phenomenon with controlled the directional reflectance distributions observed, but had its effects alterated by the action of aditional phenomenon "phase function". |
| Área | SRE |
| Arranjo | urlib.net > Fonds > Produção anterior à 2021 > DIDSR > Influencia da geometria... |
| Conteúdo da Pasta doc | acessar |
| Conteúdo da Pasta source | não têm arquivos |
| Conteúdo da Pasta agreement | não têm arquivos |
| 4. Condições de acesso e uso | |
| URL dos dados | http://urlib.net/ibi/6qtX3pFwXQZ3r59YD6/GP48q |
| URL dos dados zipados | http://urlib.net/zip/6qtX3pFwXQZ3r59YD6/GP48q |
| Arquivo Alvo | INPE 6526.pdf |
| Grupo de Usuários | administrator marciana |
| Grupo de Leitores | administrator marciana |
| Visibilidade | shown |
| Política de Arquivamento | allowpublisher allowfinaldraft |
| Permissão de Leitura | allow from all |
| Permissão de Atualização | não transferida |
| 5. Fontes relacionadas | |
| Unidades Imediatamente Superiores | 8JMKD3MGPCW/3ER446E |
| Divulgação | PORTALCAPES |
| Acervo Hospedeiro | sid.inpe.br/banon/2001/04.06.10.52 |
| 6. Notas | |
| Campos Vazios | affiliation alternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel doi e-mailaddress electronicmailaddress format isbn keywords language lineage mark mirrorrepository nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress project resumeid rightsholder schedulinginformation secondarydate secondarymark session shorttitle sponsor subject tertiarymark tertiarytype typeofwork url versiontype |
| 7. Controle da descrição | |
| e-Mail (login) | marciana |
| atualizar | |