Search Results - "Flávio Jorge Ponzoni"

The Brazilian Atlantic Forest: How much is left, and how is the remaining forest distributed? Implications for conservation by Ribeiro, Milton Cezar, Metzger, Jean Paul, Martensen, Alexandre Camargo, Ponzoni, Flávio Jorge, Hirota, Márcia Makiko

“…The neotropical Atlantic Forest supports one of the highest degrees of species richness and rates of endemism on the planet, but has also undergone a huge…”
Get full text

Calibration of a Species-Specific Spectral Vegetation Index for Leaf Area Index (LAI) Monitoring: Example with MODIS Reflectance Time-Series on Eucalyptus Plantations by Le Maire, Guerric, Marsden, Claire, Nouvellon, Yann, Stape, José-Luiz, Ponzoni, Flávio

“…The leaf area index (LAI) is a key characteristic of forest ecosystems. Estimations of LAI from satellite images generally rely on spectral vegetation indices…”
Get full text

Local Illumination Influence on Vegetation Indices and Plant Area Index (PAI) Relationships by Ponzoni, Flavio Jorge, da Silva, Clayton Borges, dos Santos, Sandra Benfica, Montanher, Otavio Cristiano, dos Santos, Thiago Batista

“…Relationships between biophysical parameters and radiometric data have been tested and evaluated by several professionals using empirical and/or physical…”
Get full text

Topographic effects on the determination of hyperspectral vegetation indices: a case study in southeastern Brazil by de Oliveira, Lucas Maia, Galvão, Lênio Soares, Ponzoni, Flávio Jorge

“…We investigated the sensitivity of 16 hyperspectral vegetation indices (VIs) to topographic effects in southeastern Brazil. Using Hyperion data acquired over…”
Get full text

Leaf area index estimation with MODIS reflectance time series and model inversion during full rotations of Eucalyptus plantations by le Maire, Guerric, Marsden, Claire, Verhoef, Wouter, Ponzoni, Flávio Jorge, Lo Seen, Danny, Bégué, Agnès, Stape, José-Luiz, Nouvellon, Yann

“…The leaf area index (LAI) of fast-growing Eucalyptus plantations is highly dynamic both seasonally and inter-annually, and is spatially variable depending on…”
Get full text

IMPACT OF TOPOGRAPHIC CORRECTION ON SOIL AND VEGETATION COVER SPECTRAL CHARACTERIZATION BY TM/LANDSAT 5 IMAGERY by Ponzoni, Flávio Jorge

“…ABSTRACT Several topographic correction methods have been developed to be applied to orbital imagery. The main objective of these initiatives has been focused…”
Get full text

Variations in reflectance with seasonality and viewing geometry: Implications for classification of Brazilian savanna physiognomies with MISR/Terra data by Liesenberg, Veraldo, Galvão, Lênio Soares, Ponzoni, Flávio Jorge

“…Bidirectional Reflectance Factor (BRF) data, collected at nine view angles, four bands and six dates by the Multi-angle Imaging SpectroRadiometer (MISR), were…”
Get full text

Estimativa de volume de madeira em plantios de Eucalyptus spp. utilizando dados hiperespectrais e dados topográficos by Canavesi, Vanessa(Instituto Nacional de Pesquisas Espaciais), Ponzoni, Flávio Jorge(Instituto Nacional de Pesquisas Espaciais), Valeriano, Márcio Morisson(Instituto Nacional de Pesquisas Espaciais)

“…A disponibilidade de dados hiperespectrais trouxe expectativas nos meios acadêmicos e empresariais quanto à potencialidade de sua aplicação no setor florestal…”
Get full text

Possibilities of discriminating tropical secondary succession in Amazonia using hyperspectral and multiangular CHRIS/PROBA data by Galvao, Lenio Soares, Ponzoni, Flavio Jorge, Liesenberg, Veraldo, dos Santos, Joao Roberto

“…CHRIS/PROBA data collected in the Brazilian Amazonia in 4 view angles (-36°, nadir, +36°, +55°) and 62 bands (410 -1000 nm range) were evaluated for the…”
Get full text

Pre-Launch Absolute Calibration of CCD/CBERS-2B Sensor by Ponzoni, Flávio Jorge, Albuquerque, Bráulio Fonseca Carneiro

“…Pre-launch absolute calibration coefficients for the CCD/CBERS-2B sensor have been calculated from radiometric measurements performed in a satellite…”
Get full text

ANÁLISE ESPAÇO-TEMPORAL DOS ÍNDICES DE COBERTURA VEGETAL NO MUNICÍPIO DA MATOLA, MOÇAMBIQUE by Euclides Délio Matule, Flávio Jorge Ponzoni, Joselisa Maria Chaves

“…A expansão urbana no município da Matola em Moçambique tem acontecido de forma desordenada. Para melhor diagnosticar essa expansão ao longo do tempo, foram…”
Get full text

Análise da dinâmica sazonal e separabilidade espectral de algumas fitofisionomias do cerrado com índices de vegetação dos sensores MODIS/TERRA e AQUA by Liesenberg, Veraldo, Ponzoni, Flávio Jorge(Instituto Nacional de Pesquisas Espaciais Divisão de Sensoriamento Remoto Divisão de Sensoriamento Remoto), Galvão, Lênio Soares(Instituto Nacional de Pesquisas Espaciais Divisão de Sensoriamento Remoto Divisão de Sensoriamento Remoto)

“…Composições de 16 dias de índices de vegetação do sensor MODerate resolution Imaging Spectroradiometer (MODIS), com resolução espacial de 1km, a bordo dos…”
Get full text

Structural characterization of canopies of Eucalyptus spp. using radiometric data from TM/Landsat 5 by Pacheco, L.R.F, Ponzoni, F.J, Santos, S.B. dos, Andrades Filho, C. de O

“…Empirical approaches and, more recently, physical approaches, have grounded the establishment of logical connections between radiometric variables derived from…”
Get full text

Landsat data respond to variations in the structure of Caatinga plant communities along a successional gradient by SILVA, FERNANDA KELLY G. DA, MARTINS, FERNANDO ROBERTO, TEIXEIRA, ADUNIAS DOS SANTOS, MAS, JEAN-FRANÇOIS, MENEZES, BRUNO S. DE, PONZONI, FLAVIO JORGE, ARAÚJO, FRANCISCA S. DE

“…Plant community succession is generally approached with phytosociological methods, but field surveys are time-consuming, expensive, and limited to several of…”
Get full text

Caracterização espectral de estágios sucessionais de vegetação secundária arbórea em Altamira (PA), através de dados orbitais by Ponzoni, Flávio Jorge(Instituto Nacional de Pesquisas Espaciais Divisão de Sensoriamento Remoto), Rezende, Ana Carolina Pinto(Instituto Nacional de Pesquisas Espaciais Divisão de Sensoriamento Remoto)

“…Imagens TM/Landsat 5 (bandas TM1-TM5 e TM7) de Altamira, PA, de 07.02.1991 foram transformadas em reflectância de superfície usando o modelo 6S de correção…”
Get full text

Influência da resolução espacial de imagens orbitais na identificação de elementos da paisagem em Altamira-PA by Ponzoni, Flávio Jorge(Instituto Nacional de Pesquisas Espaciais Divisão de Sensoriamento Remoto), Rezende, Ana Carolina Pinto(Instituto Nacional de Pesquisas Espaciais Divisão de Sensoriamento Remoto)

“…Imagens do sensor TM/Landsat-5 referentes às bandas de TM1 a TM5 e TM7 do município de Altamira-PA, Brasil, da passagem de 20/7/1991, modificadas para 60, 100,…”
Get full text

COMPARAÇÃO ENTRE FATORES DE REFLECTÂNCIA GERADOS A PARTIR DE DADOS DOS SENSORES TM/LANDSAT 5 E MODIS/TERRA APLICANDO DIFERENTES METODOLOGIAS DE CONVERSÃO DE DADOS by Ponzoni, Flávio Jorge, Macarringue, Lucrêncio Silvestre, Santos, Sandra Benfica dos, Junior, Juvenal Lima dos Santos

“…Este trabalho tem como objetivo comparar os fatores de reflectância de diferentes alvos com base nos produtos MODIS/Terra e TM/Landsat 5 corrigidos…”
Get full text

Simulating the Canopy Reflectance of Different Eucalypt Genotypes With the DART 3-D Model by Oliveira, Julianne de Castro, Feret, Jean-Baptiste, Ponzoni, Flavio Jorge, Nouvellon, Yann, Gastellu-Etchegorry, Jean-Philippe, Campoe, Otavio Camargo, Stape, Jose Luiz, Rodriguez, Luiz Carlos Estraviz, le Maire, Guerric

“…Finding suitable models of canopy reflectance in forward simulation mode is a prerequisite for their use in inverse mode to characterize canopy variables of…”
Get full text

Effect of elevated atmospheric CO2 on spectral reflectance of coffee leaves of plants cultivated at face facility by Ponzoni, Flávio Jorge, Hamada, Emilia, Gonçalves, Renata Ribeiro do Valle, Pazianotto, Ricardo Antônio Almeida

“…Climate change impacts are stressing many economic sectors worldwide, including agriculture, increasingly hindering efforts to meet human needs. Dioxide carbon…”
Get full text

INFLUENCE OF THE TOPOGRAPHIC CORRECTION STRATEGY ON THE LAND COVER CLASSIFICATION: A SPECTRAL APPROACH by Ana Carolina Moreira Pessôa, Flávio Jorge Ponzoni

“…Topographic correction methods applied to orbital imagery have been evaluated by several authors. The evaluation criteria have been based on the correlation…”
Get full text