REPEAT-PASS DUAL-ANTENNA SYNTHETIC-APERTURE RADAR INTERFEROMETRIC CHANGE-DETECTION POST-PROCESSING

Synthetic aperture radar (SAR) interferometric change-detection (ICD) maps are highly sensitive to both macro and micro temporal changes in SAR surface reflectivity. This change is detected as decorrelations in the complex cross-correlation between two SAR complex images collecte d at different times. However, in many instances, numerous detected de correlations are not due to changes during the elapsed time,but due to other decorrelating effects. Using information from a repeat-pass, du al-antenna interferometric SAR (IFSAR) change pair, we were able to id entify over 70 percent of the ICD correlations less than 0.80 as non-t emporal changes, or false changes. The remaining temporal changes coin cided well with controlled changes made in the scene. Our post-process ing results show the IFSAR coherence maps to be the most informative S AR data component for such false temporal change analysis.