Mathematical Framework for Phase-Triangulation Algorithms in Distributed-Scatterer Interferometry

作者：Cao Ning^*; Lee Hyongki; Jung Hahn Chul

来源：IEEE Geoscience and Remote Sensing Letters, 2015, 12(9): 1838-1842.

DOI：10.1109/LGRS.2015.2430752

• Differential interferometric synthetic aperture radar (DInSAR)
• distributed scatterer (DS) interferometry
• persistent scatterer (PS) interferometry (PSI)
• phase triangulation (PT)
• synthetic aperture radar (SAR)

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.

• 出版日期2015-9