STUDY ON COSEISMIC DEFORMATION OF WENCHUAN EARTHQUAKE BY USE OF L AND C WAVEBANDS OF SAR DATA
It describes the results of the ground motion monitoring over Wenchuan earthquake sites in the southwest of China with the ALOS PALSAR and ENVISAT ASAR sensors based on the differential interferometric synthetic aperture radar ( DInSAR) technique. In recent the C-band data were mainly used to detect the ground deformation , but the results of interferometry are limited by high vegetated areas and rugged terrains. The study purpose is to demonstrate that these constraints decrease significantly at L-band data due to its spatial resolution and the longer wavelength. The real and simulated data also show L-band data sets are more appropriate for detecting the deformation over the rugged terrain and high vegetation area. Especially, for the large deformation gradient are-a, PALSAR images are not likely to generate interferometric phase aliasing which goes against the phase unwrap.
国家科技期刊平台
NSTL
万方数据
维普
