@InProceedings{GaidaBreuGalvTele:2015:EsVaRe,
               author = "Gaida, William and Breunig, F{\'a}bio Marcelo and Galv{\~a}o, 
                         L{\^e}nio Soares and Teles, Thiago Sousa",
          affiliation = "{} and {} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Estudo das varia{\c{c}}{\~o}es da reflect{\^a}ncia de imagens 
                         RapidEye em fun{\c{c}}{\~a}o dos par{\^a}metros da modelagem 
                         topogr{\'a}fica no Parque Estadual do Turvo, Rio Grande do Sul",
            booktitle = "Anais...",
                 year = "2015",
               editor = "Gherardi, Douglas Francisco Marcolino and Arag{\~a}o, Luiz 
                         Eduardo Oliveira e Cruz de",
                pages = "1005--1012",
         organization = "Simp{\'o}sio Brasileiro de Sensoriamento Remoto, 17. (SBSR)",
            publisher = "Instituto Nacional de Pesquisas Espaciais (INPE)",
              address = "S{\~a}o Jos{\'e} dos Campos",
             abstract = "At leaf scale, the spectral features of vegetation are mainly 
                         associated to photosynthetic pigment, leaf internal structure and 
                         water concentration, allowing the use of remote sensing techniques 
                         to monitoring forest areas. However, external factors such as 
                         topographic characteristics affect the spectral response of the 
                         target. Thus, the objective of the study was to evaluate the 
                         reflectance of a forest area as a function of local topographic 
                         variation. The study was carried out in the Parque Estadual do 
                         Turvo (PET), in South Brazil, using RapidEye images. The 
                         methodology included the use of Moderate Resolution Imaging 
                         Spectroradiometer (MODIS) and Advanced Spaceborne Thermal Emission 
                         and Reflection Radiometer (ASTER) global digital elevation model 
                         (GDEM). Topographic variables as slope, aspect and topographic 
                         illumination factor were obtained using ASTER GDEM. For a local 
                         evaluation, two RapidEye images from June 28, 2012 and October 17, 
                         2012 were acquired. The results showed that the red edge and near 
                         infrared bands presented a higher dependence on topographic 
                         variables, considering their higher coefficient of variation. 
                         North oriented slopes presented greater values of reflectance due 
                         to orthogonal illumination. Because the RapidEye images are widely 
                         used for several applications, caution is recommended when one 
                         considers studying areas with highly undulated topography to 
                         correct for topographic effects. These preliminary results require 
                         more studies including field inspection integration to remote 
                         sensing derived results.",
  conference-location = "Jo{\~a}o Pessoa",
      conference-year = "25-29 abr. 2015",
                 isbn = "978-85-17-0076-8",
                label = "189",
             language = "pt",
         organisation = "Instituto Nacional de Pesquisas Espaciais (INPE)",
                  ibi = "8JMKD3MGP6W34M/3JM47L5",
                  url = "http://urlib.net/ibi/8JMKD3MGP6W34M/3JM47L5",
           targetfile = "p0189.pdf",
                 type = "Floresta e vegeta{\c{c}}{\~a}o",
        urlaccessdate = "27 abr. 2024"
}