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

被引：88

作者：

Cao, Ning ^{[1
,2
]}

Lee, Hyongki ^{[1
,2
]}

Jung, Hahn Chul ^{[3
,4
]}

机构：

[1] Univ Houston, Dept Civil & Environm Engn, Houston, TX 77204 USA

[2] Univ Houston, Natl Ctr Airborne Laser Mapping, Houston, TX 77204 USA

[3] NASA, Goddard Space Flight Ctr, Off Appl Sci, Greenbelt, MD 20771 USA

[4] Sci Syst & Applicat Inc, Lanham, MD 20706 USA

来源：

IEEE GEOSCIENCE AND REMOTE SENSING LETTERS | 2015年 / 12卷 / 09期

关键词：

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

D O I：

10.1109/LGRS.2015.2430752

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

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.

引用

页码：1838 / 1842

页数：5

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