Airborne Survey
Mostrando 1-12 de 25 artigos, teses e dissertações.
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1. The use of RPAS - Remotely Piloted Aircraft Systems in the topographic mapping for mining
Abstract In the light of the technological transformations that have been occurring in the field of Remote Sensing, the objective of this study was to evaluate the feasibility and the quality of the results that could be achieved in the topographic modeling of the terrain with a Remotely Piloted Aircraft Systems (RPAS) survey in open-pit mines. The mining ac
REM, Int. Eng. J.. Publicado em: 2018-04
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2. Estudo das variações diurnas de radiação gama atmosférica e sua interferência em levantamentos de espectrometria gama aerotransportada / Study of diurnal variations of atmospheric gamma radiation and interference in airborne gamma spectrometry surveys
As concentrações de urânio equivalente, tório equivalente, potássio e taxa de exposição foram determinadas em diferentes dias e horários para um mesmo local, a partir de dados gamaespectrométricos aerotransportados, medidos a uma altura média de 81 metros. Os perfis individuais foram então comparados com os perfis médios de todas as medidas. Os e
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/10/2012
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3. Processamento e modelagem de dados geofísicos e imagens ASTER aplicados à interpretação geológica e prospecção mineral na Província Aurífera de Alta Floresta, MT / Processing and modeling of geophysical data and ASTER images applied to geological interpretation and mineral exploration in the Alta Floresta Gold Province, MT
The Alta Floresta Gold Province (AFGP) is located in the central-southern Amazon craton between the limits of the Ventuari-Tapajos (1.95-1.8 Ga) and Rio Negro-Juruena (1.8-1.55 Ga) provinces. In its eastern segment there are more than one hundred gold deposits hosted in volcanic and plutonic rocks and concentrated along the Peru-Trairao Belt in a NW-SE direc
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
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4. Análise estatística da concentração de potássio obtida por aerolevantamentos geofísicos em diferentes formações geológicas na Região de Santa Maria (RS)
The present work was developed in outcrops of Santa Maria region, southern Brazil, Rio Grande do Sul State. Statistic evaluations were applied in different rock types. The possibility to distinguish different geologic units, sedimentary and volcanic (acid and basic types) by means of the statistic analyses from the use of airborne gamma-ray spectrometry inte
Publicado em: 2010
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5. Map quality evaluation and edge extraction of off-terrain objects on airbone laser scanner products. / Avaliação de qualidade cartográfica e extração de bordas de objetos não pertencentes ao terreno em produtos gerados pelo sistema de varredura a laser aerotransportado.
The airborne LASER scanner is competitive technology for surveys that generates digital surface models (DSM) and Digital Terrain Models (DTM). This technology suffered some resistance by the aerosurvey enterprise (and some users), but is conquering its market share due the amount of papers recently published in this field. A limitation associated with this t
Publicado em: 2009
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6. Airborne geophysical and geological data applied to the selection of groudwater potential areas in crystalline rocks of Ceara, Brazil / Dados aerogeofisicos e geologicos aplicados a seleção de areas favoraveis para agua subterranea no dominio cristalino do Ceara, Brasil
The location of water well in Northeast Brazil is usually based on the interpretation of structural lineaments in aerial-photographs and electromagnetic and electrical resistivity ground geophysics surveys. However, the success of these techniques is variable, and the small coverage area is another limitation. This Thesis favors a different approach, the use
Publicado em: 2008
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7. Ajustamento simultâneo do bloco de faixas do laser scanner aerotransportado (ALS)
The vertical discrepancy in the zone of lateral superposition is a distortion of the original measure that is hard to correct due to the sweeping realized by the laser sensor, especially, located in the lateral extremes of the flight area. Research does a judicious evaluation of the results dedicated to the simultaneous adjustment of the block, which may res
Publicado em: 2008
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8. Aerogeofísica aplicada à compreensão do sistema de empurrões da sequência Santa Terezinha de Goiás, Brasil Central
Recent Airborne Survey data from the Goias state was processed and interpreted in the present dissertation. Radiometric data was adquired sampling between 1 s and 0.1 s for magnetometry, flying at a height of 100 meters, with spacing of 500m and tied with control lines with spacing of 5000m, collected througout NS production lines. We describe the techniques
Publicado em: 2007
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9. Interpretação de dados de eletromagnetometria aerotransportada (AEM) do sistema GEOTEM (domínio do tempo)
Desde 1950 estudos vem sendo realizados na aplicação da condutividade elétrica ao mapeamento geológico, com ênfase nos sistemas aeroeletromagnéticos. Estes sistemas usam o campo eletromagnético secundário obtido por contrastes em propriedades elétricas em subsuperfície em resposta a perturbações criadas por fontes eletromagnéticas naturais ou ar
Publicado em: 2007
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10. Geologia do sudoeste do Estado de Goiás : Integração de dados geológicos e aerogeofísicos de alta densidade
The airborne magnetic and gamma ray spectrometry data related to the Airborne Geophysic Survey Project of the State of Goiás (Block 1) executed between 2004 and 2006 and considered of high density by the acquisition and treatment configuration, were integrated in GIS environment with the existing geologic information, in the SW Goiás region located from th
Publicado em: 2007
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11. Integração de dados de geofísica aérea aplicada à geologia e à prospecção mineral no distrito esmeraldífero de Itabira-Ferros, Quadrilátero Ferrífero, MG.
The Itabira-Ferros area is located in the Quadrilátero Ferrifero region, State of Minas Gerais, and it is known for abundant emerald occurrences. The area is characterized by volcanic metasedimetary sequences of the greenstone belt type (Rio das Velhas Super group) and paleoproterozoic iron formations of Minas Super Group, inserted in granitic bobies (Borra
Publicado em: 2006
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12. Sensitisation to airborne moulds and severity of asthma: cross sectional study from European Community respiratory health survey
BMJ.