Comparison of InSAR two-pass and time series methods for analysing landslides in central Georgia, Caucasus

Different landslides have been detected in InSAR using different data analysis strategies: moving landslides (some cm per month) are detectable in two-pass InSAR results, where the same regions loose coherence in most other InSAR pairs. As a result, when analyzing InSAR time series, such landslides may remain undetected. On the other hand, slow landslide (some mm per year) or North-South (parallel to radar satellite orbit) moving landslides could only be identified in InSAR time series. Therefore, our future strategy is to detect landslides from InSAR by applying both approaches, two-pass InSAR and InSAR time series.