3D velocity field time series using synthetic aperture radar: application to tidal-timescale ice-flow variability in Rutford Ice Stream, West Antarctica
We present a general method for retrieving time-series of three component surface velocity field vector given a set of continuous synthetic aperture radar (SAR) acquisitions collected from multiple geometries. Our algorithm extends the single-line-of-sight mathematical framework developed for time-s...
Main Authors: | , , , , |
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Other Authors: | , , , |
Format: | Book Part |
Language: | English |
Published: |
Society of Photo-Optical Instrumentation Engineers
2016
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Subjects: | |
Online Access: | https://authors.library.caltech.edu/75197/ https://authors.library.caltech.edu/75197/1/1000309.pdf https://resolver.caltech.edu/CaltechAUTHORS:20170317-084759208 |
Summary: | We present a general method for retrieving time-series of three component surface velocity field vector given a set of continuous synthetic aperture radar (SAR) acquisitions collected from multiple geometries. Our algorithm extends the single-line-of-sight mathematical framework developed for time-series analysis using interferometric SAR (InSAR) to three spatial dimensions. The inversion is driven by a design matrix corresponding to a dictionary of displacement functions parameterized in time. The resulting model minimizes a cost function using a non-regularized least-squares method. We applied our method to Rutford ice stream (RIS), West Antarctica, using a set of 101 multi-track multi-angle COSMO-SkyMed displacement maps generating azimuth and range pixel offsets. |
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