Physics – Geophysics
Scientific paper
Apr 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26..875m&link_type=abstract
Geophysical Research Letters, Volume 26, Issue 7, p. 875-878
Physics
Geophysics
25
Geodesy And Gravity: Seismic Deformations, Exploration Geophysics: Remote Sensing, Radio Science: Remote Sensing
Scientific paper
ERS SAR amplitude images are utilized to map ground displacements from a sub-pixel correlation method. It yields a ground two-dimensional displacement field with independent measurements about every 128m in azimuth and 250m in range. The accuracy depends on the characteristics of the images. For the Landers test case, the 1-σ uncertainty is 0.8m in range and 0.4m in azimuth. We show that this measurement provides a map of major surface fault ruptures accurate to better than 1km and information on coseismic deformation comparable to the 92 GPS measurements available. Although less accurate, this technique is more robust than SAR interferometry and provides complementary information since interferograms are only sensitive to the displacement in range.
Avouac Jean-Philippe
Michel Rémi
Taboury Jean
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