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Mathematical Framework for Phase-Triangulation Algorithms in Distributed-Scatterer Interferometry
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DOI：10.1109/LGRS.2015.2430752.png)
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To improve the spatial density of measurement points of persistent-scatterer interferometry, distributed scatterer (DS) should be considered and processed. An important procedure in DS interferometry is the phase triangulation (PT). This letter introduces two modified PT algorithms (i.e., equal-weighted PT and coherence-weighted PT) and analyzes the mathematical relations between different published PT methods (i.e., the maximum-likelihood phase estimator, least squares estimator, and eigendecomposition-based phase estimators). The analysis shows that the above five PT methods share very similar mathematical forms with different weight values in the estimation procedure.
Keyword:
Differential interferometric synthetic aperture radar (DInSAR)
distributed scatterer (DS) interferometry
persistent scatterer (PS) interferometry (PSI)
phase triangulation (PT)
synthetic aperture radar (SAR)
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