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TM/Landsat 5 images (April and May 2009) from Capão Bonito (SP)\udregion where Eucalyptus urophilla, Eucalyptus grandis and a hybrid of both species have\udbeen planted were utilized in the spectral characterization of some stands that presented\udstructural differences explained mainly by age. These images have been converted to\udphysical values such as surface reflectance factors and from these values principal\udcomponents images were generated. The dispersion of PC1 and PC2 on a bi-dimensional\udspace has been evaluated to identify tendencies of pixels positioning. Results have shown\udthat for young eucalyptus canopies (up to 3 years old) the positioning is well defined,\udoccupying the lower part of the dispersion clouds and far from the graph origin (zero).\udThis result indicates more participation of the lower portions of the canopies, which\udpresents lower values of reflectance in the near infrared (bare soil or dry branches) and\udhigh reflectance in the visible region. The older canopies presented higher influence\udof photosynthetic active leaves rather than the shadowed and lower portions of the\udcanopies. The spectral characterization of eucalyptus canopies at the two temporal set\udof data was consistent

CARACTERIZAÇÃO ESPECTRO-TEMPORAL DE DOSSÉIS DE Eucalyptus spp. MEDIANTE DADOS RADIOMÉTRICOS TM/Landsat5