Assessment of building damages under different ground settlement movements using mt-insar monitoring technique

A non-transitory computer readable medium having stored therein program instructions executable by a computing system to cause the computing system to perform a Multi-temporal Interferometric Synthetic Aperture Radar (MT-InSAR) method for jointly detecting persistent scatterers (PSs) and distributed scatterers (DSs), the method comprising:

• in a first-tier network, selecting a plurality of persistent scatterers (PSs) if a value of temporal coherence of the PS is larger than a first predetermined threshold;
• performing beamforming and M-estimator to enhance robustness of parameter estimation;
• in a second-tier network, identifying new PSs from the plurality of PSs by performing same prior steps;
• continuously updating the network (first-tier or second-tier or both) based on the newly selected PSs until the value of the temporal coherence is smaller than the first predetermined threshold;
• performing coherence-weight phase-linking (CWPL) to reconstruct optimal phases for detection of a distributed scatterer (DS);
• and
• identifying that a pixel is a DS if the temporal coherence is greater than a second predetermined threshold based on the reconstructed optimal phases.