Journal
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
Volume 55, Issue 10, Pages 5515-5524Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TGRS.2017.2709783
Keywords
3-D analysis; ocean tides; pixel offsets (POs); Rutford ice stream (RIS); synthetic aperture radar (SAR); time-series analysis
Categories
Funding
- National Aeronautics and Space Administration
- NASA Cyospheric Sciences [NNX14AH80G]
- National Science Foundation [1452587]
- Albert Parvin Foundation
- ARCS LA Chapter Foundation
- NASA
- Division Of Earth Sciences
- Directorate For Geosciences [1452587] Funding Source: National Science Foundation
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We present a method for inferring time-dependent three-component surface deformation fields given a set of geodetic images of displacements collected from multiple viewing geometries. Displacements are parameterized in time with a dictionary of displacement functions. The algorithm extends an earlier single-component (i.e., single line of sight) framework for time-series analysis to three spatial dimensions using combinations of multitemporal, multigeometry interferometic synthetic aperture radar (InSAR) and/or pixel offset (PO) maps. We demonstrate this method with a set of 101 pairs of azimuth and range PO maps generated for a portion of the Rutford Ice Stream, West Antarctica, derived from data collected by the COSMO-SkyMed satellite constellation. We compare our results with previously published InSAR mean velocity fields and selected GPS time series and show that our resulting three-component surface displacements resolve both secular motion and tidal variability.
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