Journal
REMOTE SENSING
Volume 10, Issue 6, Pages -Publisher
MDPI
DOI: 10.3390/rs10060844
Keywords
TSX Staring spotlight; high resolution InSAR; small-scale movements; atmospheric phase; layover; DSM blending
Categories
Funding
- NSERC Engage project
- NSERC MDA-CSA Industrial Research Chair program in Synthetic Aperture Radar Technologies, Methods, and Applications at Simon Fraser University
- BGC
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We discuss enhanced processing methods for high resolution Synthetic Aperture Radar (SAR) interferometry (InSAR) to monitor small landslides with difficult spatial characteristics, such as very steep and rugged terrain, strong spatially heterogeneous surface motion, and coherence-compromising factors, including vegetation and seasonal snow cover. The enhanced methods mitigate phase bias induced by atmospheric effects, as well as topographic phase errors in coherent regions of layover, and due to inaccurate blending of high resolution discontinuous with lower resolution background Digital Surface Models (DSM). We demonstrate the proposed methods using TerraSAR-X (TSX) Staring Spotlight InSAR data for three test sites reflecting diverse challenging landslide-prone mountain terrains in British Columbia, Canada. Comparisons with corresponding standard processing methods show significant improvements with resulting displacement residuals that reveal additional movement hotspots and unprecedented spatial detail for active landslides/rockfalls at the investigated sites.
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