Abstract
We present the results of ongoing multi-year monitoring of ground deformation over an oil field in Southern California, USA. Deformation measurements were obtained from a 12 year time-series of repeat-pass interferometric acquisitions from multiple satellite SAR sensors in multiple beam modes. The independent measurements from each beam mode were integrated into a unified cross-stack inversion to obtain cumulative deformation measurements at a very fine temporal resolution (as fine as a few days). The precision of estimates was improved versus single-stack interferometry due to the increased temporal overlap in interferometric pairs, and because acquisitions can be made from opposite (ascending/descending) or complimentary geometries concurrently. The method also allows for a robust integration of deformation profiles from multiple sensors when there is little temporal overlap, and alleviates the impact of temporal gaps in the acquisitions.
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