This document discusses the application of persistent scatterer interferometry (PSI) to study landslides in the Berkeley Hills. PSI uses phase information from SAR images taken at different times to measure surface deformation with millimeter accuracy. It was applied using Envisat, ERS, Radarsat, and TerraSAR-X data. Thousands of persistent scatterers were identified, allowing measurement of surface motion along the Hayward Fault and within landslides. Future work will continue monitoring with additional SAR data to better resolve three-dimensional landslide motions.

1. Persistent scatterersarinterferometry application on berkeley hills landslidesLing Lei1,2, Yinqing Zhou1, Jingwen Li, Roland Bürgmann21 Beijing University of Aeronautics and Astronautics(Beihang University)2 Berkeley Seismological Lab, University of California

2. Background: Bay Area and Berkeley Hills

3. Background: What is InSARInterferometricSynthetic Aperture Radar

4. Two SAR images of the same area at two different times are required

5. Data are processed into complex interfeorgram

6. InSAR uses the phase difference information Limitations of Conventional InSARintflattopodefo atmbaselinenoise Decorrelation (Temporal and Geometric)

7. Unwrapping errors

8. Residual topographic signal

9. Variation in atmospheric signal delay

10. Orbit errorsPersistent ScattererInSARPotential method of time series analysis

11. Independent from surrounding incoherent pixels, applicable in vegetated areas

12. Elevation values with sub-m accuracy and surface movements with mm accuracy Persistent ScatterersDistributed ScattererPersistent ScattererPixel Phase

13. Persistent ScattererInSARExploits spatial correlation of the deformation signalStart with single master series of interferograms, with phase reduced using DEM, we are left with Correlated with perpendicular baselineintdefoatm△topo△orbitnoise Correlatedspatially

14. Data Sets

15. Amplitude Image

16. Temporal and Perpendicular Baseline

17. Temporal and Perpendicular Baseline

18. Temporal and Perpendicular Baseline

19. Temporal and space baselines

20. Temporal and space baselines

21. Envisat interferograms

22. Wrapped interferograms

23. Unwrapped interferograms