Comparing Tropical Vegetation Structure from Interferometric SAR at C-band, Field Measurements, and Lidar
Robert
Treuhaft, Jet Propulsion Laboratory, California Institute of Technology, robert.treuhaft@jpl.nasa.gov
(Presenting)
Bruce
Chapman, Jet Propulsion Laboratory, California Institute of Technology, bruce.chapman@jpl.nasa.gov
Fabio
Gonçalves, Oregon State University, fabio.goncalves@oregonstate.edu
Joao
Roberto
dos Santos, Instituto Nacional de Pesquisas Espaciais, jroberto@ltid.inpe.br
Luciano
Dutra, Instituto Nacional de Pesquisas Espaciais, dutra@dpi.inpe.br
Paulo
Alencastro
Graça, Instituto Nacional de Pesquisas da Amazônia, pmlag@inpa.gov.br
Jason
Drake, USDA Forest Service, jasondrake@fs.fed.us
We present vegetation profiles of multibaseline (12-14 baselines) InSAR achieved by an airborne system (AirSAR) flying at different altitudes over the wet tropical forests La Selva Biological Station in Costa Rica. We will also show preliminary results of single-baseline SRTM-derived vertical structure over the moist tropical forests of Tapajós National Forest in Amazônia, Brazil. At La Selva, InSAR phase and coherence were used to produce the profiles over 30 sites for which we also made field measurements. Approaches to InSAR calibration in the vertical direction, using phase distributions, will be emphasized. The information content of single-baseline InSAR will be explored to bear on likely mission scenarios which will have limited numbers of baselines, as well as the SRTM study mentioned below. InSAR-generated profiles will be compared at La Selva to profiles estimated from field measurements of height, commercial height, and crown lateral dimensions. InSAR profiles will also be compared to 1998 and 2005 lidar acquisitions from LVIS. At Tapajós, we will show preliminary results of using both SRTM coherence derived from a research 30-m product as well as phase. We will also test a phase-only approach. InSAR derived structure in Brazil will be compared to field measurements made in the year 2000.
NASA Carbon Cycle & Ecosystems Active Awards Represented by this Poster: