Simultaneous Car-Borne SAR Imaging at L-Band and Ku-Band for DInSAR-Based Mobile Mapping of Ground Motion in Alpine Terrain

Inhalt:
In this contribution, we present high-resolution car-borne DInSAR imagery of a fast-moving landslide, simultaneously acquired at Ku-band and L-band. Recently, we have developed and implemented a car-borne—and UAV-borne—DInSAR end-to-end system at L-band also including INS/GNSS-based navigation, SAR focusing, and interferometric processing. Using this L-band SAR system we have demonstrated car-borne and UAV-borne measurements of ground motion at various sites. We then enhanced the car-based setup by adding a Ku-band SAR system alongside the Γ L-Band SAR. In October 2023, we revisited the Brinzauls landslide in Switzerland, where we acquired high-resolution car-borne repeat-pass DInSAR data at Ku-band and L-band. This active landslide consists of various compartments with different kinematic behavior and with different land cover. Our car-borne DInSAR imagery obtained at Ku-band and L-band provides critical information at high spatial resolution to localize and distinguish landslide compartments moving at different velocities for a more detailed mapping of geological-kinematic features within the landslide.