@Article{TreuhaftChSaGoDuGrDr:2009:VePrTr,
               author = "Treuhaft, Robert N. and Chapman, Bruce D. and Santos, Jo{\~a}o 
                         Roberto dos and Gon{\c{c}}alves, Fabio Guimar{\~a}es and Dutra, 
                         Luciano Vieira and Gra{\c{c}}a, Paulo M. L. A. and Drake, Jason 
                         B.",
          affiliation = "Jet Propulsion Laboratory, California Institute of Technology and 
                         Jet Propulsion Laboratory, California Institute of Technology and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Oregon 
                         State University} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Instituto Nacional de Pesquisas da Amaz{\^o}nia} and 
                         Forest Service, USDA",
                title = "Vegetation profiles in tropical forests from multibaseline 
                         interferometric synthetic aperture radar, field, and lidar 
                         measurements",
              journal = "Journal of Geophysical Research",
                 year = "2009",
               volume = "114",
               number = "D23110",
                pages = "1--16",
                month = "Dec.",
                 note = "Setores de Atividade: Administra{\c{c}}{\~a}o P{\'u}blica, 
                         Defesa e Seguridade Social.",
             keywords = "Agriculture, Biodiversity, Geodetic satellites, Imaging systems, 
                         Measurement errors, Optical radar, Radar, Statistics, Synthetic 
                         aperture radar, Synthetic apertures, Vegetation, C-bands, Costa 
                         Rica, Field data, Field measurement, Global carbon cycle, Inducing 
                         fields, Interferometric synthetic aperture radars, Leaf area, 
                         LIDAR data, Lidar measurements, Lidar profiles, Measurement 
                         techniques, Multi-baseline, Standard deviation, Tropical forest, 
                         Vegetation density, Vegetation distribution, Radar measurement, 
                         airborne sensing, altitude, biodiversity, calibration, carbon 
                         cycle, data acquisition, data set, field method, leaf area, lidar, 
                         synthetic aperture radar, tropical forest, vegetation index, Costa 
                         Rica, La Selva Biological Station, Limon.",
             abstract = "This paper addresses the estimation of vertical vegetation density 
                         profiles from multibaseline interferometric synthetic aperture 
                         radar (InSAR) data from the AirSAR aircraft at C band over 
                         primary, secondary, and abandoned-pasture stands at La Selva 
                         Biological Station, Costa Rica in 2004. Profiles were also 
                         estimated from field data taken in 2006 and lidar data taken with 
                         the LVIS, 25 m spot instrument in 2005. After motivating the study 
                         of tropical forest profiles based on their role in the global 
                         carbon cycle, ecosystem state, and biodiversity, this paper 
                         describes the InSAR, field, and lidar data acquisitions and 
                         analyses. Beyond qualitative agreement between profiles from the 3 
                         measurement techniques, results show that InSAR and lidar 
                         profile-averaged mean height have RMS scatters about 
                         field-measured means of 3.4 m and 3.2 m, 16% and 15% of the 
                         average mean height, respectively. InSAR and lidar standard 
                         deviations of the vegetation distribution have RMS scatters about 
                         the field standard deviations of 1.9 m and 1.5 m, or 27% and 21%, 
                         respectively. Dominant errors in the profile-averaged mean height 
                         for each measurement technique were modeled. InSAR inaccuracies, 
                         dominated by ambiguities in finding the ground altitude and 
                         coherence calibration, together account for about 3 m of InSAR 
                         error in the mean height. The dominant, modeled error for the 
                         field measurements was the inaccuracy in modeling the trees as 
                         uniformly filled volumes of leaf area, inducing field errors in 
                         mean height of about 3 m. The dominant, modeled lidar error, also 
                         due to finding the ground, was 2 m.",
                  doi = "10.1029/2008JD011674",
                  url = "http://dx.doi.org/10.1029/2008JD011674",
                 issn = "0148-0227",
                label = "lattes: 9840759640842299 5 TreuhaftChSaGoDuGrDr:2009:VePrTr",
             language = "en",
           targetfile = "jgrd15452.pdf",
                  url = "http://www.agu.org/journals/jd/papersinpress.shtml#id2008JD011674",
        urlaccessdate = "27 abr. 2024"
}