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Spatial coherence considerations for the phase center approximation
  • Daniel C. Brown,
  • Thomas Blanford
Daniel C. Brown
Penn State University

Corresponding Author:dan.brown@psu.edu

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Thomas Blanford
Penn State University
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Synthetic aperture sonar image reconstruction relies on the coherence of overlapping phase centers to provide accurate micronavigation for a sensed scene. It is shown that phase centers lose coherence for near-range scattering from large SAS arrays due to the fundamentally bistatic nature of these sensors. This effect is modeled using the van Cittert-Zernike theorem and a point-based sonar scattering model. Reduction of the window length used in the delay estimation process can partially mitigate the loss of coherence at the expense of increased variance in the resulting delay estimates.
30 Dec 2022Submitted to Electronics Letters
02 Jan 2023Submission Checks Completed
02 Jan 2023Assigned to Editor
06 Jan 2023Reviewer(s) Assigned
01 Mar 2023Review(s) Completed, Editorial Evaluation Pending
02 Mar 2023Editorial Decision: Revise Minor
12 Mar 20231st Revision Received
12 Mar 2023Submission Checks Completed
12 Mar 2023Assigned to Editor
12 Mar 2023Review(s) Completed, Editorial Evaluation Pending
13 Mar 2023Editorial Decision: Accept