Development of National Ground Deformation Rate Map of China Based on InSAR Technology
The damage of ground deformation is huge and far-reaching.Although it is relatively mature to monitor ground deformation via interferometric synthetic aperture radar(In-SAR),challenges still exist in the fast extraction of large-scale ground deformation,i.e.,across the country.To quick-ly obtain the national ground deformation information,we de-sign an optimized method for fast extraction of large-scale ground deformation based on supercomputing parallel comput-ing,improve and innovate the baseline combination method of interferometric pairs,large-scale phase unwrapping algo-rithm,atmospheric effect correction method,etc.Based on this method,we use 10 157 scenes of Sentinel-1 data to de-velop a 40-meter resolution national ground deformation rate map for the whole territory of China in 2021.The accuracy of the deformation rate is 4.82 mm/a,the effective deformation information coverage is 94.6%,and there is no obvious edge difference between the scenes.At the same time,the typical ground deformation areas in China are analyzed.This re-search provides a reference for the routinely fast extraction of large-scale ground deformation.
ground deformationinterferometric synthetic aperture radar(InSAR)fast extraction of large-scale defor-mationSentinel-1
NETL
NSTL
万方数据
