@Article{PonzoniPachSantAndr:2015:MeDaRa,
author = "Ponzoni, Fl{\'a}vio Jorge and Pacheco, Ludmila Roque Ferraz and
Santos, Sandra Benfica dos and Andrades Filho, Cl{\'o}dis de
Oliveira",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Agn
Agroindustrial e Biocombustivel LTDA} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Universidade Estadual do Rio
Grande do Sul (UERGS)}",
title = "Caracteriza{\c{c}}{\~a}o espectro-temporal de doss{\'e}is de
Eucalyptus spp. Mediante dados radiom{\'e}tricos TM/Landsat5",
journal = "Cerne",
year = "2015",
volume = "21",
number = "2",
pages = "267--275",
month = "Apr.",
keywords = "Biophysical data, Canopies, Spectral characterization.",
abstract = "TM/Landsat 5 images (April and May 2009) from Cap{\~a}o Bonito
(SP) region where Eucalyptus urophilla, Eucalyptus grandis and a
hybrid of both species have been planted were utilized in the
spectral characterization of some stands that presented structural
differences explained mainly by age. These images have been
converted to physical values such as surface reflectance factors
and from these values principal components images were generated.
The dispersion of PC1 and PC2 on a bi-dimensional space has been
evaluated to identify tendencies of pixels positioning. Results
have shown that for young eucalyptus canopies (up to 3 years old)
the positioning is well defined, occupying the lower part of the
dispersion clouds and far from the graph origin (zero). This
result indicates more participation of the lower portions of the
canopies, which presents lower values of reflectance in the near
infrared (bare soil or dry branches) and high reflectance in the
visible region. The older canopies presented higher influence of
photosynthetic active leaves rather than the shadowed and lower
portions of the canopies. The spectral characterization of
eucalyptus canopies at the two temporal set of data was
consistent.",
doi = "10.1590/01047760201521021457",
url = "http://dx.doi.org/10.1590/01047760201521021457",
issn = "0104-7760",
language = "en",
targetfile = "ponzoni_caracterizacao.pdf",
urlaccessdate = "02 maio 2024"
}