@Article{TreuhaftGoChNeSaGr:2013:FoStLi,
               author = "Treuhaft, Robert and Gon{\c{c}}alves, F{\'a}bio Guimar{\~a}es 
                         and Chapman, Bruce and Neumann, Maxim and Santos, Joao Roberto dos 
                         and Gra{\c{c}}a, Paulo Mauricio Lima de Alencastro",
          affiliation = "{National Aeronautics and Space Administration (NASA)} and {The 
                         Woods Hole Research Center} and {National Aeronautics and Space 
                         Administration (NASA)} and {National Aeronautics and Space 
                         Administration (NASA)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas da 
                         Amaz{\^o}nia (INPA)}",
                title = "Relationships between remotely sensed forest structure and 
                         biomass: fourier structure from LiDAR and InSAR and penetration at 
                         microwave frequencies",
              journal = "Revista Brasileira de Cartografia",
                 year = "2013",
               volume = "65",
               number = "4",
                pages = "747--755",
                 note = "Setores de Atividade: Outras atividades profissionais, 
                         cient{\'{\i}}ficas e t{\'e}cnicas.",
             keywords = "interferometry, forest inventory, biomass, tropical rain forest, 
                         LIDAR.",
             abstract = "This paper proposes the correlation of biomass with Fourier 
                         transforms of LiDAR and InSAR vegetation density measurements at 
                         vertical and horizontal Fourier spatial frequencies, as a means to 
                         estimate biomass. It further suggests that each Fourier frequency 
                         of leaf area density could be modeled as a harmonic oscillator, in 
                         which leaf area itself provides a restoring force to constrain it 
                         to some nominal value. Preferred Fourier frequencies for tropical 
                         forest stands at La Selva Biological Station, Costa Rica, with 
                         vertical wavelengths of 12 to 18 m and 5-7m are shown from LIDAR 
                         as an update to previous work. These two wavelengths are close to 
                         the average height and crown depth of forest stands measured. As 
                         an example of different kinds of modeling, it is suggested that 
                         biomass be considered a complex quantity with amplitude 
                         representing the usual biomass, and the phase representing some 
                         undetermined characteristic of the forest. Finally, since 
                         structure-based biomass estimation will presumably improve with 
                         signal penetration, a diffraction calculation of penetration 
                         through holes at L- and C-band shows that the diffractive 
                         component of penetration from Cband is greater than or equal to 
                         that at L-band, countering to some extent the lower penetration at 
                         C-band due to the frequency dependence of waters extinction.",
                 issn = "0560-4613 and 1808-0936",
                label = "lattes: 1646956319628219 5 TreuhaftGoChNeSaGr:2013:FOSTLi",
             language = "en",
        urlaccessdate = "16 jun. 2024"
}