15 September 1998 IFSAR phase unwrapping in the presence of Dirichlet boundary conditions
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Abstract
Phase unwrapping is one of the key computational elements in digital elevation model generation from interferometric SAR. In this paper we present a reformulation of the weighted least squares phase unwrapping approach that incorporates Dirichlet boundary conditions. The application of this formulation to the incorporation of control points into the solution as well as for unwrapping the interferogram in stages is discussed. The ability of the weighted least squares approach to fully unwrap an interferogram can be very dependent on the weight matrix used. This has led us to develop an adaptive approach to updating the weight matrix to be used in conjunction with our weighted least squares approach. Examples along the preliminary results based on ERS data will be presented.
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George W. Rogers, Arthur W. Mansfield, Houra Rais, Paul L. Poehler, "IFSAR phase unwrapping in the presence of Dirichlet boundary conditions", Proc. SPIE 3370, Algorithms for Synthetic Aperture Radar Imagery V, (15 September 1998); doi: 10.1117/12.321832; https://doi.org/10.1117/12.321832
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KEYWORDS
Interferometric synthetic aperture radar

Chemical elements

Synthetic aperture radar

Fourier transforms

Interferometry

Partial differential equations

Phase interferometry

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