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7 - Phase Unwrapping

Published online by Cambridge University Press:  13 September 2025

David T. Sandwell ,
Xiaohua Xu ,
Jingyi Chen ,
Robert J. Mellors ,
Meng Wei ,
Xiaopeng Tong ,
John B. DeSanto  and
Qi Ou
David T. Sandwell
Affiliation:
Scripps Institution of Oceanography, University of California, San Diego
Xiaohua Xu
Affiliation:
University of Science and Technology of China
Jingyi Chen
Affiliation:
University of Texas at Austin
Robert J. Mellors
Affiliation:
Scripps Institution of Oceanography, University of California, San Diego
Meng Wei
Affiliation:
University of Rhode Island
Xiaopeng Tong
Affiliation:
Institute of Geophysics, China Earthquake Administration
John B. DeSanto
Affiliation:
University of Washington
Qi Ou
Affiliation:
University of Edinburgh
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Summary

Chapter 7 introduces the basic concepts and fundamental limitations (i.e., residues) of phase unwrapping. It presents three common unwrapping methods: the global Fourier transform method, the path-following branch-cut method, and the minimum cost flow method. Additionally, it covers methods for correcting integer ambiguities using phase closure within stacks of interferograms.

Keywords

phase unwrapline of sightLOSlayoverdecorrelationresidueHelmholtz decompositionbranch cutSNAPHUphase closure

Information

Type
Chapter
Information
Satellite Radar Interferometry
Theory and Practice
 , pp. 84 - 100
Publisher: Cambridge University Press
Print publication year: 2025
Creative Commons
Creative Common License - CCCreative Common License - BYCreative Common License - NCCreative Common License - ND
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  • Phase Unwrapping
  • David T. Sandwell, Scripps Institution of Oceanography, University of California, San Diego, Xiaohua Xu, University of Science and Technology of China, Jingyi Chen, University of Texas at Austin, Robert J. Mellors, Scripps Institution of Oceanography, University of California, San Diego, Meng Wei, University of Rhode Island, Xiaopeng Tong, Institute of Geophysics, China Earthquake Administration, John B. DeSanto, University of Washington, Qi Ou, University of Edinburgh
  • Book: Satellite Radar Interferometry
  • Online publication: 13 September 2025
  • Chapter DOI: https://doi.org/10.1017/9781009606226.008
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  • Phase Unwrapping
  • David T. Sandwell, Scripps Institution of Oceanography, University of California, San Diego, Xiaohua Xu, University of Science and Technology of China, Jingyi Chen, University of Texas at Austin, Robert J. Mellors, Scripps Institution of Oceanography, University of California, San Diego, Meng Wei, University of Rhode Island, Xiaopeng Tong, Institute of Geophysics, China Earthquake Administration, John B. DeSanto, University of Washington, Qi Ou, University of Edinburgh
  • Book: Satellite Radar Interferometry
  • Online publication: 13 September 2025
  • Chapter DOI: https://doi.org/10.1017/9781009606226.008
Available formats
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To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Phase Unwrapping
  • David T. Sandwell, Scripps Institution of Oceanography, University of California, San Diego, Xiaohua Xu, University of Science and Technology of China, Jingyi Chen, University of Texas at Austin, Robert J. Mellors, Scripps Institution of Oceanography, University of California, San Diego, Meng Wei, University of Rhode Island, Xiaopeng Tong, Institute of Geophysics, China Earthquake Administration, John B. DeSanto, University of Washington, Qi Ou, University of Edinburgh
  • Book: Satellite Radar Interferometry
  • Online publication: 13 September 2025
  • Chapter DOI: https://doi.org/10.1017/9781009606226.008
Available formats
×