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Title: Differential Optical Synthetic Aperture Radar

Abstract

A new differential technique for forming optical images using a synthetic aperture is introduced. This differential technique utilizes a single aperture to obtain unique (N) phases that can be processed to produce a synthetic aperture image at points along a trajectory. This is accomplished by dividing the aperture into two equal "subapertures", each having a width that is less than the actual aperture, along the direction of flight. As the platform flies along a given trajectory, a source illuminates objects and the two subapertures are configured to collect return signals. The techniques of the invention is designed to cancel common-mode errors, trajectory deviations from a straight line, and laser phase noise to provide the set of resultant (N) phases that can produce an image having a spatial resolution corresponding to a synthetic aperture.

Inventors:
 [1]
  1. San Ramon, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
879984
Patent Number(s):
6879279
Application Number:
10/402053
Assignee:
The Regents of the University of California (Oakland, CA)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01S - RADIO DIRECTION-FINDING
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Stappaerts, Eddy A. Differential Optical Synthetic Aperture Radar. United States: N. p., 2005. Web.
Stappaerts, Eddy A. Differential Optical Synthetic Aperture Radar. United States.
Stappaerts, Eddy A. Tue . "Differential Optical Synthetic Aperture Radar". United States. https://www.osti.gov/servlets/purl/879984.
@article{osti_879984,
title = {Differential Optical Synthetic Aperture Radar},
author = {Stappaerts, Eddy A},
abstractNote = {A new differential technique for forming optical images using a synthetic aperture is introduced. This differential technique utilizes a single aperture to obtain unique (N) phases that can be processed to produce a synthetic aperture image at points along a trajectory. This is accomplished by dividing the aperture into two equal "subapertures", each having a width that is less than the actual aperture, along the direction of flight. As the platform flies along a given trajectory, a source illuminates objects and the two subapertures are configured to collect return signals. The techniques of the invention is designed to cancel common-mode errors, trajectory deviations from a straight line, and laser phase noise to provide the set of resultant (N) phases that can produce an image having a spatial resolution corresponding to a synthetic aperture.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2005},
month = {4}
}

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Works referenced in this record:

Design of sparse array imaging systems
conference, January 1995


Synthetic-aperture experiment in the visible with on-axis digital heterodyne holography
journal, January 2001