HR: 09:15h
AN: B41E-05 INVITED    [Abstracts]
TI: Tropical Forest Vegetation Profiles and Biomass from Multibaseline Interferometric SAR at C- band
AU: * Treuhaft, R
EM: robert.treuhaft@jpl.nasa.gov
AF: Jet Propulsion Laboratory, Caltech, 4800 Oak Grove Drive, MS138-212, Pasadena, CA 91109, United States
AU: Chapman, B
EM: bruce.chapman@jpl.nasa.gov
AF: Jet Propulsion Laboratory, Caltech, 4800 Oak Grove Drive, MS138-212, Pasadena, CA 91109, United States
AU: Santos, J R
EM: jroberto@ltid.inpe.br
AF: Instituto Nacional de Pesquisas Espaciais, Avenida dos Astronautas, 1758, Sao Jose dos Campos, SP 12227010, Brazil
AU: Dutra, L
EM: dutra@dpi.inpe.br
AF: Instituto Nacional de Pesquisas Espaciais, Avenida dos Astronautas, 1758, Sao Jose dos Campos, SP 12227010, Brazil
AU: Goncalves, F
EM: fabiogg@dsr.inpe.br
AF: Instituto Nacional de Pesquisas Espaciais, Avenida dos Astronautas, 1758, Sao Jose dos Campos, SP 12227010, Brazil
AU: Graca, P A
EM: pmlag@inpa.gov.br
AF: Instituto Nacional de Pesqusis das Amazonas, Av. Andre Araujo, 2936, Manaus, AM 69083000, Brazil
AU: Drake, J
EM: jbdrake@mail.ucf.edu
AF: USDA Forest Service, 325 John Knox Rd, Tallahassee, FL 32303, United States
AB: Interferometric synthetic aperture radar (InSAR) involves the reception of SAR signals at two spatially separated ends of a baseline. The resulting phase and coherence observations from InSAR are both sensitive to the vertical structure of vegetation. However, multiple InSAR observations—more than one phase-coherence-pair—are needed to estimate parameters describing vertical structure. Multiple observations can be made with different baselines, polarizations, or frequencies. This talk reviews why InSAR is sensitive to vertical structure. It then describes an experiment in the tropical forests of La Selva Biological Station in Costa Rica in which 12-14 baselines were used to estimate vegetation vertical profiles at C-band. Calibration of the InSAR phases and coherences with nearby pastures was essential for interpreting the data for vegetation, rather than surface, characteristics. Relative density profiles from primary, secondary, and selectively logged forests will be shown along with profiles from abandoned pastures. Field methods used to validate the profiles involve measuring individual tree dimensions, and the production of field profiles will be described and compared to InSAR profiles. Lidar profiles will also be shown for comparison. Functions of the InSAR profiles will be used estimate biomass of 30 stands
DE: 0439 Ecosystems, structure and dynamics (4815)
DE: 0480 Remote sensing
SC: Biogeosciences [B]
MN: 2007 Fall Meeting