| 1. Identificação | |
| Tipo de Referência | Artigo em Evento (Conference Proceedings) |
| Site | mtc-m12.sid.inpe.br |
| Código do Detentor | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identificador | 6qtX3pFwXQZ3r59YD6/GP6TF |
| Repositório | sid.inpe.br/iris@1912/2005/07.20.02.23.45 |
| Última Atualização | 2015:11.11.13.32.12 (UTC) marciana |
| Repositório de Metadados | sid.inpe.br/iris@1912/2005/07.20.02.24 |
| Última Atualização dos Metadados | 2018:06.05.00.52.31 (UTC) administrator |
| Chave Secundária | INPE-6373-PRE/2447 |
| Rótulo | 7695 |
| Chave de Citação | AhernKuxSalcPlet:1993:EvCbRa |
| Título | An evaluation of C-band radar to detect openings in moist tropical forests  |
| Ano | 1993 |
| Data Secundária | 19970728 |
| Data de Acesso | 13 maio 2024 |
| Tipo Secundário | PRE CI |
| Número de Arquivos | 1 |
| Tamanho | 1703 KiB |
| 2. Contextualização | |
| Autor | 1 Ahern, F. J. 2 Kux, Hermann Johann Heinrich 3 Salcedo, R. 4 Pletsch, R. W |
| Grupo | 1 DSR-INPE-MCT-BR |
| Nome do Evento | South American Radar Experiment, (SAREX-92). |
| Localização do Evento | Paris, FR |
| Data | 6-8 Dec. 1993 |
| Páginas | 57-69 |
| Histórico (UTC) | 2008-06-09 20:11:46 :: administrator -> jefferson :: 2010-07-07 18:50:51 :: jefferson -> administrator :: 2015-05-18 12:02:09 :: administrator -> marciana :: 1993 2015-11-11 13:32:12 :: marciana -> administrator :: 1993 2018-06-05 00:52:31 :: 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 |
| Palavras-Chave | RADAR DE ABERTURA SINTETICA SAR FLORESTA TROPICAL |
| Resumo | Airborne and satellite SAR data sources which are currently or imminently available offer the possibility to monitor the status of moist tropical forests. In an effort to develop this area of applications, we have investigated the use of a number of C-band SAR data sources to detect openings in moist tropical forests. The smallest openings, typically 0.25 to 3 ha in size and are often associated with shifting cultivation, were reliably detected with 7-look airborne SAR with 6 m resolution in range and azimuth. Openings in the range 1 - 10 ha in area, associated with settlements in extractive reserves in Brazil were also reliably detected with the high resolution airborne data. These small openings were not visible on simulated or actual satellite SAR images with four looks and 25 to 30 m resolution. Agricultural settlement projects typically create many contiguous openings which total 100 to 1000 ha or more in area. These were reliably detected with both airborne and satellite images. However, mapping of boundaries was found to be much more accurate with the higher resolution airborne data than with the actual and simulated satellite data. Land clearing for cattle ranching creates large rectangular openings of 1000s of ha in size. These clearings were, in general, reliably detected and mapped with all of the data sources evaluated. However, detection and mapping with satellite SAR data is more difficult while the land is still in the process of conversion to pasture, and again when it is overgrown at an early stage of primary succession. Under these conditions, the average backscatter from the cleared land is often similar to that of the surrounding forest. This finding indicates that the most reliable mapping of clearings may be possible if radar data is acquired annually, to detect each pasture in its "clean pasture" stage when it has the highest contrast with its surroundings. There is a tendency to underestimate the area of clearings using SAR data alone. However, optical satellite data can be used to produce a regression model to remove much of this systematic error. |
| Área | SRE |
| Arranjo | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > DIDSR > An evaluation of... |
| 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/GP6TF |
| URL dos dados zipados | http://urlib.net/zip/6qtX3pFwXQZ3r59YD6/GP6TF |
| Arquivo Alvo | INPE 6373.pdf |
| Grupo de Usuários | administrator marciana |
| Grupo de Leitores | administrator marciana |
| Visibilidade | shown |
| Permissão de Leitura | allow from all |
| Permissão de Atualização | não transferida |
| 5. Fontes relacionadas | |
| Unidades Imediatamente Superiores | 8JMKD3MGPCW/3ER446E |
| Acervo Hospedeiro | sid.inpe.br/banon/2001/04.06.10.52 |
| 6. Notas | |
| Campos Vazios | affiliation archivingpolicy archivist booktitle callnumber copyholder copyright creatorhistory descriptionlevel dissemination doi e-mailaddress edition editor electronicmailaddress format isbn issn language lineage mark mirrorrepository nextedition notes numberofvolumes orcid organization parameterlist parentrepositories previousedition previouslowerunit progress project publisher publisheraddress resumeid rightsholder schedulinginformation secondarymark serieseditor session shorttitle sponsor subject tertiarymark tertiarytype type url versiontype volume |
| 7. Controle da descrição | |
| e-Mail (login) | marciana |
| atualizar | |