Single and Multipolarimetric SAR Tomography of Forested Areas: A Parametric Approach
Single and Multipolarimetric SAR Tomography of Forested Areas: A Parametric Approach
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DOI：
10.1109/tgrs.2009.2037748
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发表时间：
2010-05-01
影响因子：
8.2
通讯作者：
Tebaldini, Stefano
中科院分区：
文献类型：
--
作者：
Tebaldini, Stefano
本文描述了一种通过基于单极化或多极化采集的多个合成孔径雷达（SAR）观测来对森林地区进行层析成像表征的技术。该技术基于将多基线数据的傅里叶谱表征为由沿垂直方向移位的两个有效散射中心以及相关联的去相关项构成的思想。因此，SAR 层析成像将被表述为检测分辨率单元内散射中心数量、估计描述其空间结构的参数以及评估相关反向散射功率的问题。通过协方差匹配估计技术进行参数估计，提供渐近最优解。报告了在瑞典雷宁斯托普森林地区的真实 P 波段多基线全偏振数据集上进行的实验结果。
In this paper, a technique is described for the tomographic characterization of forested areas through multiple synthetic aperture radar (SAR) observations, based on either single or multipolarimetric acquisitions. This technique is based on the idea of characterizing the Fourier spectrum of the multibase-line data as being constituted by two effective scattering centers displaced along the vertical direction, plus the associated decorrelation terms. As a result, SAR tomography will be formulated as the problem of detecting the number of scattering centers within the resolution cell, estimating the parameters that describe their spatial structure, and evaluating the associated backscattered powers. Parameter estimation is carried out through the covariance matching estimation technique, which provides an asymptotically optimal solution. The results of an experiment performed on a real P-band multibaseline fully polarimetric data set relative to the forested site of Remningstorp, Sweden, are reported.