研究目的
Investigating how conventional SAR tomography (TomoSAR) can be linked to Polarization Coherence Tomography (PCT) by finding a suitable function basis for the estimation of 3D reflectivity profiles in forest volumes.
研究成果
The study demonstrates that a meaningful profile reconstruction can be obtained even in a very sub-sampled and sparse case with only three coherences available, confirming the potentials of linking conventional TomoSAR to PCT by finding a suitable function basis. Future work will address the profile reconstruction performance as a function of the baseline distribution and the suitability of one profile basis for different forest types.
研究不足
The study is limited by the small number of acquisitions and non-uniform baseline distributions in space borne implementations of SAR tomography for forest volumes. The choice of an adequate function basis for different forest types is still an open point.
1：Experimental Design and Method Selection:
The study uses SAR tomography and Polarization Coherence Tomography to estimate 3D reflectivity profiles in forest volumes. The methodology involves the inversion of interferometric coherences to estimate reflectivity profiles.
2：Sample Selection and Data Sources:
The analysis is carried out on TomoSAR reflectivity profiles obtained from an L-band tomographic data set acquired by the DLR’s F-SAR airborne platform over the forest of Traunstein (South of Germany).
3：List of Experimental Equipment and Materials:
DLR’s F-SAR airborne platform for data acquisition.
4：Experimental Procedures and Operational Workflow:
The study involves the estimation of Fourier profiles from interferometric coherences, the determination of a basis for these profiles, and the reconstruction of profiles using this basis.
5：Data Analysis Methods:
The study uses a linear inversion to estimate weights from interferometric coherences and evaluates the performance of profile reconstruction with a reduced set of coherences.
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