31 January 1995 Retrieval of forest canopy parameters for OTTER using an optimization technique
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Abstract
An inversion algorithm based on a nonlinear optimization technique is used to retrieve a subset of forest canopy parameters that can be used in ecosystem modeling. The inversion algorithm uses a parametric model derived from a discrete component forest scattering model which includes all major scattering contributions to radar backscatter. The parametric model, however, is derived for cases where only one mechanism dominates the scattering process, in this case, branch layer volume scattering. The free parameters are taken to be the real and imaginary parts of the dielectric constant of branch layer constituents. The parametric model and the inversion algorithm are validated with synthetic data and applied to two data sets taken at different dates over one of the OTTER sites (Santiam Pass). The inversion algorithm is shown to be a useful tool in the quantitative monitoring of canopy moisture status, as well as a building block of its future versions which will include a more comprehensive set of forest scattering parameters as unknowns.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mahta Moghaddam "Retrieval of forest canopy parameters for OTTER using an optimization technique", Proc. SPIE 2314, Multispectral and Microwave Sensing of Forestry, Hydrology, and Natural Resources, (31 January 1995); doi: 10.1117/12.200732; https://doi.org/10.1117/12.200732
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