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| Registros recuperados: 11 | |
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| Machado Neto, Arlindo de Paula; Batista, Antonio Carlos; Soares, Ronaldo Viana; Biondi, Daniela; de Morais, Riubi Lopes. |
| O presente estudo teve por objetivo analisar o comportamento da Fórmula de Monte Alegre (FMA) e quantificar os focos de calor detectados por satélites de referência, comparando os mesmos com os incêndios ocorridos no Parque Nacional da Chapada dos Guimarães de 2007 a 2015. O monitoramento dos focos de calor foi realizado através de imagens dos satélites AQUA, TERRA e NOAA, cujos dados diários de focos detectados foram usados para compor a série temporal ao longo dos anos, permitindo a análise de tendências dos números de focos para o parque. Os dados foram adquiridos na plataforma do Instituto Nacional de Pesquisas Espaciais, na base de dados históricos do Instituto Nacional de Meteorologia e junto à gerência do parque. Na maioria dos anos houve uma... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Engenharia Florestal/Conservação da natureza Incêndios florestais; Unidade de conservação; Satélites Forest fires; Conservation units; Satellites. |
| Ano: 2017 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1440 |
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| MacAuley, Molly K.; Darmstadter, Joel; Fini, John N.; Greenberg, Joel S.; Maulbetsch, John S.; Schaal, A. Michael; Styles, Geoffrey S.W.; Vedda, James A.. |
| Satellite solar power (SSP) has been suggested as an alternative to terrestrial energy resources for electricity generation. In this study, we consider the market for electricity from the present to 2020, roughly the year when many experts expect SSP to be technically achievable. We identify several key challenges for SSP in competing with conventional electricity generation in developed and developing countries, discuss the role of market and economic analysis as technical development of SSP continues during the coming years, and suggest future research directions to improve understanding of the potential economic viability of SSP. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Energy economics; Solar power; Space; Satellites; Resource /Energy Economics and Policy. |
| Ano: 2000 |
URL: http://purl.umn.edu/10542 |
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| Sapp, Joseph W.; Mouche, Alexis; Jelenak, Zorana; Chang, Paul S.; Frasier, Stephen J.. |
| In Winter 2017, the University of Massachusetts Amherst's Imaging Wind and Rain Airborne Profiler (IWRAP) was flown on a National Oceanic and Atmospheric Administration (NOAA) WP-3D Hurricane Hunter aircraft under the direction of scientists from Center for Satellite Applications and Research (STAR) at NOAA/National Environmental Satellite, Data, and Information Service (NESDIS) over the North Atlantic ocean out of Shannon, Ireland. IWRAP is a dual-frequency, conically scanning, profiling Doppler radar initially developed by Microwave Remote Sensing Laboratory (MIRSL) at the University of Massachusetts Amherst that is routinely installed on the NOAA WP-3D research aircraft. The flight on February 6, 2017, targeted a region of high winds (greater than 30... |
| Tipo: Text |
Palavras-chave: Satellites; Aircraft; Spaceborne radar; Synthetic aperture radar; Sea measurements; Wind speed; C-band; Cross polarization; Normalized radar cross section (NRCS); Ocean winds; Scatterometry. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00640/75251/75648.pdf |
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| LUIZ, A. J. B.. |
| The proper utilization of statistics in any application area depends primarily on the degree of knowledge of the nature of employed data, as well as on the level of clarity of established goals. Remote sensing offers a rather particular set of data that bear characteristics that must be taken into consideration when choosing the statistical methods to be used in analysis. Application of those data in agriculture will, particularly when the aim is the delimitation and quantification of crop areas, define quite specific goals that should influence on the selection of statistical analysis techniques. The theoretically-based alliance between remote sensing and statistics in a way that is adequate to estimate crop areas, results in a step ahead in the efficient... |
| Tipo: Separatas |
Palavras-chave: Crop.; Satélite; Produção agrícola; Estatística; Remote sensing; Satellites; Statistics.. |
| Ano: 2005 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1015713 |
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| GRIS, D. J.; VENDRUSCULO, L. G.; ZOLIN, C. A.. |
| Water is a basic resource for human life and understanding how it cycles in the environment is important for its management. Nevertheless, hydrological models require high quality data in order to accurately reproduce the natural water cycle. Precipitation is one of the most important data required for these models, and it is usually provided by weather stations located across the territory. However, stations tend to be sparsely distributed in developing countries, especially in low populated areas, which is the case of the state of Mato Grosso, Brazil. Mato Grosso has only 36 official weather stations (INMET, 2018) in an area of 903,357 km², resulting in approximately one station for each 25,000 km². Considering this context, satellite-based precipitation... |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Mato Grosso; Chuva; Satélite; Análise de Dados; Rain; Rainfall duration; Accuracy; Satellites; Data analysis. |
| Ano: 2018 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1140324 |
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| FONGARO, C. T.; DEMATTÊ, J. A. M.; RIZZO, R.; SAFANELLI, J. L.; MENDES, W. de S.; DOTTO, A. C.; VICENTE, L. E.; FRANCESCHINI, M. H. D.; USTIN, S. L.. |
| Abstract: Soil mapping demands large-scale surveys that are costly and time consuming. It is necessary to identify strategies with reduced costs to obtain detailed information for soil mapping. We aimed to compare multispectral satellite image and relief parameters for the quantification and mapping of clay and sand contents. The Temporal Synthetic Spectral (TESS) reflectance and Synthetic Soil Image (SYSI) approaches were used to identify and characterize texture spectral signatures at the image level. Soil samples were collected (0?20 cm depth, 919 points) from an area of 14,614 km 2 in Brazil for reference and model calibration. We compared different prediction approaches: (a) TESS and SYSI; (b) Relief-Derived Covariates (RDC); and (c) SYSI plus RDC.... |
| Tipo: Artigo de periódico |
Palavras-chave: Mapeamento do solo; Imagem de satélite; Sensoriamento Remoto; Satélite; Solo Arenoso; Solo Argiloso; Soil map; Remote sensing; Multispectral imagery; Satellites; Clay soils; Sandy soils; Reflectance spectroscopy; Precision agriculture; Soil degradation. |
| Ano: 2018 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1114592 |
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| PERALTA,DAVID JULIAN M.; SANTOS,DOUGLAS S. DOS; TIKAMI,AURO; SANTOS,WALTER A. DOS; PEREIRA,EDSON W.R.. |
| Abstract Software Defined Radio (SDR) uses a processor, a special receiver and software that play the main parts of the receiver (mixer, filters, amplifiers, modulators, demodulators, etc.) and it is quite advantageous for its flexibility and compact size as it reduces the amount of hardware components while adapting for different needs. This work briefly presents the SDR concept and approach for obtaining satellite telemetries and imagery in the context of different modulation schemes, link budget requirements and different satellites types. Two case studies are presented for supporting affordable ground segment and promoting satellites projects in Brazil. Reception from the 1st Brazilian picosatellite, Tancredo-1, with specific software developed, UbaTM... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ground stations; Satellites; Software Defined Radio; Space systems. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000603175 |
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| SANCHES, I. D.; LUIZ, A. J. B.; MONTIBELLER, B.; SCHULTZ, B.; TRABAQUINI, K.; EBERHARDT, D. S.; FORMAGGIO, A. R.; MAURANO, L. E. P.. |
| Abstract: The agricultural activity can greatly benefit from remote sensing technology (RS). Optical passive RS has been vastly explored for agricultural mapping and monitoring, in despite of cloud cover issue. This is observed even in the tropics, where frequency of clouds is very high. However, more studies are needed to better understand the high dynamism of tropical agriculture and its impact on the use of passive RS. In tropical countries, such as in Brazil, the use of current agricultural technologies, associated with favourable climate, allow the planting period to be wide and to have plants of varying phenological cycles. In this context, the main objective of the current study is to better understand the dynamics of a selected area in Southeast of... |
| Tipo: Artigo de periódico |
Palavras-chave: Satellite image; Optical sensor; Multispectral; RGB false composition; NDVI; Sensoriamento Remoto; Satélite; Agricultura; Satellites; Image analysis; Image interpretation; Tropical agriculture; Monitoring. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1116250 |
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| Gaye, A.; Citeau, J.. |
| The atmospheric water vapor, a main climatic parameter, remains also one of the less well known in the inter tropical area. Different space programs have been carried out to improve its measure: the data provided by these experimental or operational programs, give an alternate and complementary information the model’s analysis. Moreover, the time series available today, are long enough to allow studies of variability of different climatic parameters. The following contribution, dedicated to the climate of the Western Africa, analyses the atmospheric humidity as retrieved by NOAA8/TOVS12 dated over the last 20 years. The climatology of the upper tropospheric humidity (UTH13), retrieved from HIRS-121, evidences the importance of the position and the... |
| Tipo: Report |
Palavras-chave: Climate; Noaa/Tovs; Intertropical zone of convergence; Subsidence; Satellites; SSM/I; Evaporation; Monsoons. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/571 |
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| Registros recuperados: 11 | |
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