@InProceedings{SugawaraRudo:2011:AcCrVe,
               author = "Sugawara, Luciana Miura and Rudorff, Bernardo Friedrich Theodor",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais - INPE} and {Instituto 
                         Nacional de Pesquisas Espaciais - INPE}",
                title = "Acompanhamento do crescimento vegetativo da 
                         cana-de-a{\c{c}}{\'u}car por meio de s{\'e}ries temporais de 
                         NDVI do sensor Modis",
            booktitle = "Anais...",
                 year = "2011",
               editor = "Epiphanio, Jos{\'e} Carlos Neves and Galv{\~a}o, L{\^e}nio 
                         Soares",
                pages = "391--398",
         organization = "Simp{\'o}sio Brasileiro de Sensoriamento Remoto, 15. (SBSR).",
            publisher = "Instituto Nacional de Pesquisas Espaciais (INPE)",
              address = "S{\~a}o Jos{\'e} dos Campos",
             keywords = "remote sensing, NDVI, sugarcane, 4253H, Twice smoother, 
                         sensoriamento remoto, NDVI, cana-de-a{\c{c}}{\'u}car, filtro 
                         4253H, Twice.",
             abstract = "Monitoring of crop growth condition is relevant for crop yield 
                         estimation. Time series of vegetation indices derived from remote 
                         sensing satellite imagery provide important information on crop 
                         growth conditions. The present work aims to monitor key sugarcane 
                         growing periods at different cutting stages using NDVI/MODIS time 
                         series to provide information on sugarcane growing conditions. The 
                         study was carried out in S{\~a}o Paulo state for crop years 
                         2006/07, 2007/08, and 2008/09. The 16-days composites of NDVI, 
                         MOD13Q1 product, were filtered using the 4253H, Twice smoother. A 
                         sampling grid (250x250 m) of pure pixels was generated for 
                         sugarcane fields at different cutting stage. This grid was used to 
                         monitor the NDVI evolution, as well as the NDVI sum, every 16 
                         days, during the sugarcane growing season from October to March 
                         (12 observations). NDVI ranged between 0.1 and 0.9 during the 12 
                         observations in each of the three evaluated crop years. The NDVI 
                         sums indicated significant differences for sugarcane cutting 
                         stage. In addition, sugarcane at same cutting stages presented 
                         different NDVI values in different crop years. Therefore, it is 
                         possible to monitor sugarcane growing condition using NDVI/MODIS 
                         time series that can be used to estimate key input biophysical 
                         variables for agronomic crop yield models.",
  conference-location = "Curitiba",
      conference-year = "30 abr. - 5 maio 2011",
                 isbn = "{978-85-17-00056-0 (Internet)} and {978-85-17-00057-7 (DVD)}",
             language = "pt",
         organisation = "Instituto Nacional de Pesquisas Espaciais (INPE)",
                  ibi = "3ERPFQRTRW/39ULRQP",
                  url = "http://urlib.net/ibi/3ERPFQRTRW/39ULRQP",
           targetfile = "p1216.pdf",
                 type = "Agricultura",
        urlaccessdate = "27 abr. 2024"
}