Title :
SBAS and PS measurement fusion for enhancing displacement measurements
Author :
Patrascu, Carmen ; Popescu, Anca Andreea ; Datcu, Mihai
Author_Institution :
Univ. Politeh. of Bucharest, Bucharest, Romania
Abstract :
A major drawback of classical SAR interferometry is its sensitivity to temporal and geometric effects, leading to a distortion of the final results. This problem can be solved by using multi-temporal techniques, like the Small Baseline Subset and Persistent Scatterers algorithms. Both use large datasets for monitoring land cover deformation, motion or for DEM generation. Despite the fact that using the Persistent Scatterers technique can lead to a maximization of the number of acquisitions used, the number of persistent points is greatly reduced by a decrease of the coherent values of the targets over time. In this article, the authors propose a method for the selection of temporal persistent points using image subsets that comply with the small baseline rule. This method is further used to increase the accuracy of deformation measurements over the subsets´ time span.
Keywords :
deformation; displacement measurement; geophysical image processing; radar interferometry; synthetic aperture radar; terrain mapping; DEM generation; InSAR; PS measurement fusion; SBAS; classical SAR interferometry; deformation measurement; displacement measurement enhancement; distortion; geometric effects; image subsets; large datasets; monitoring land cover deformation; multitemporal technique; persistent scatterer algorithm; sensitivity; small baseline subset; temporal effects; temporal persistent point; Coherence; Decorrelation; Displacement measurement; Interferometry; Monitoring; Signal resolution; Synthetic aperture radar; DInSAR; PS; SBAS; TerraSAR-X;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2012 IEEE International
Conference_Location :
Munich
Print_ISBN :
978-1-4673-1160-1
Electronic_ISBN :
2153-6996
DOI :
10.1109/IGARSS.2012.6350548