Three-dimensional SAR imaging using cross-track coherent stereo collections

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In this paper we describe a new method for creating three-dimensional images using pairs of synthetic aperture radar (SAR) images obtained from a unique collection geometry. This collection mode involves synthetic apertures that have a common center. In this sense the illumination directions for the two SAR images are the same, while the slant planes are at different spatial orientations. The slant plane orientations give rise to cross-range layover (fore-shortening) components in the two images that are of equal magnitude but opposite directions. This differential cross-range layover is therefore proportional to the elevation of a given target, which is completely ... continued below

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6 p.

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Jakowatz, C. V., Jr.; Wahl, D. E. & Thompson, P. A. November 1997.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

In this paper we describe a new method for creating three-dimensional images using pairs of synthetic aperture radar (SAR) images obtained from a unique collection geometry. This collection mode involves synthetic apertures that have a common center. In this sense the illumination directions for the two SAR images are the same, while the slant planes are at different spatial orientations. The slant plane orientations give rise to cross-range layover (fore-shortening) components in the two images that are of equal magnitude but opposite directions. This differential cross-range layover is therefore proportional to the elevation of a given target, which is completely analogous to the situation in stereo optical imaging, wherein two film planes (corresponding to the two slant planes) result in elevation-dependent parallax. Because the two SAR collections are coherent in this particular collection mode, the images have the same speckle patterns throughout. As a result, the images may be placed into stereo correspondence via calculation of correlations between micro-patches of the complex image data. The resulting computed digital stereo elevation map can be quite accurate. Alternatively, an analog anaglyph can be displayed for 3-D viewing, avoiding the necessity of the stereo correspondence calculation.

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6 p.

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OSTI as DE98000852

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  • Asilomar conference, Monterey, CA (United States), 2-5 Nov 1997

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  • Other: DE98000852
  • Report No.: SAND--97-2715C
  • Report No.: CONF-971154--
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 555236
  • Archival Resource Key: ark:/67531/metadc693916

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • November 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Nov. 25, 2015, 5:44 p.m.

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Jakowatz, C. V., Jr.; Wahl, D. E. & Thompson, P. A. Three-dimensional SAR imaging using cross-track coherent stereo collections, article, November 1997; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc693916/: accessed January 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.