A multitemporal method for correction of tropospheric effects in differential SAR interferometry:: Application to the Gulf of Corinth earthquake

被引：39

作者：

Chaabane, Ferdaous ^{[1
]}

Avallone, Antonio

Tupin, Florence

Briole, Pierre

Maitre, Henri

机构：

[1] Sup Com, Math Appliquees Signaux & Commun Dept, Tunis 2083, Tunisia

[2] Sup Com, URISA, Tunis 2083, Tunisia

[3] Ist Nazl Geofis & Vulcanol, I-83035 Grottaminarda, Italy

[4] ENST, TSI Dept, F-75634 Paris, France

[5] Telecom Paris, CNRS UMR 5141, Lab Traitement & Commun Informat, GET, F-75634 Paris, France

来源：

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2007年 / 45卷 / 06期

关键词：

differential synthetic aperture radar interferometry (DinSAR); ground deformation; tropospheric effects;

D O I：

10.1109/TGRS.2007.894026

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：

Tropospheric inhomogeneities can form a major error source in differential synthetic aperture radar interferometry measurements, which are used in slow-deformation monitoring. Indeed, variations of atmospheric conditions between two radar acquisitions produce variations in the signal path of two images and, thus, additional fringes on differential interferograms. These effects have a strong influence on interferograms and must be compensated to obtain reliable deformation measurements. This paper presents a methodological approach to reduce at both global and local scales tropospheric contributions directly from differential interferograms. It first requires refined knowledge of the stable scatterers that can only be obtained from the analysis of a large population of multitemporal interferograms. The correction of global-scale atmospheric contribution exploits the correlation between phase and topography. The correction of local artifacts is based on the correlation between interferograms containing one common acquisition. This technique is validated on a database of 81 differential interferograms covering the Gulf of Corinth (Greece) and used to improve the measurements of ground deformation compared to global positioning system measurements.

引用

页码：1605 / 1615

页数：11

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