1. Landslide velocity mapping using ALOS-2 PALSAR-2 ScanSAR data.
- Author
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Wegmüller, Urs, Magnard, Christophe, Strozzi, Tazio, Caduff, Rafael, and Jones, Nina
- Subjects
LANDSLIDES ,TIME series analysis ,VELOCITY ,INTERFEROMETRY ,SPATIAL resolution - Abstract
This work discusses landslide velocity mapping in the Swiss Alps using ALOS-2 PALSAR-2 ScanSAR differential interferometry and interferometric time series analyses based on small data stacks of about 10 images over eight years. A wide area coverage is possible due to the 350km swath width of the ScanSAR data. In our processing sequence we resampled the sub-swath SLCs to a common spatial grid. The co-registered sub-swath SLCs were mosaiced into large co-registered mosaic SLCs. We then applied normal procedures also used for stripmap mode data to generate differential interferograms and conduct a Persistent Scatterer Interferometry (PSI) processing. The results obtained over the Swiss Alps provide a good spatial coverage, with line-of-sight displacement velocities also extracted for some landslides in forested areas. The future applicability of the technique is very promising with upcoming L-band SAR missions (NISAR, ROSE-L and PALSAR-3) that provide data of even better suitability – higher spatial resolution, shorter revisit time intervals, and free and open data access. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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