THE COMPLETE (3-D) CO-SEISMIC DISPLACEMENTS USING POINT-LIKE TARGETS OFFSET TRACKING WITH ASCENDING AND DESCENDING SAR DATA

摘要

SAR Interferometry (InSAR) has its unique advantages,rne.g., all weather/time accessibility, cm-level accuracyrnand large spatial coverage, however, it can only obtainrnone dimensional measurement along line -of-sight (LOS)rndirection. Offset tracking is an important complement tornmeasure large and rapid displacements in both azimuthrnand range directions. Here we perform offset trackingrnon detected point-like targets (PT) by calculat ing therncross-correlation with a sinc-like template. And arncomplete 3-D displacement field can be derived usingrnPT offset tracking from a pair of ascending andrndescending data. The presented case study on 2010rnM7.2 El Mayor-Cucapah earthquake helps us betterrnunderstand the rupture details.