New formulation for interferometric synthetic aperture radar for terrain mapping

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The subject of interferometric synthetic aperture radar (IFSAR) for high-accuracy terrain elevation mapping continues to gain importance in the arena of radar signal processing. Applications to problems in precision terrain-aided guidance and automatic target recognition, as well as a variety of civil applications, are being studied by a number of researchers. Not unlike many other areas of SAR processing, the subject of IFSAR can at first glance appear to be somewhat mysterious. In this paper we show how the mathematics of IFSAR for terrain elevation mapping using a pair of spotlight mode SAR collections can be derived in a very ... continued below

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11 p.

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Jakowatz, C. V. Jr.; Wahl, D. E.; Eichel, P. H. & Thompson, P. A. April 1, 1994.

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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

The subject of interferometric synthetic aperture radar (IFSAR) for high-accuracy terrain elevation mapping continues to gain importance in the arena of radar signal processing. Applications to problems in precision terrain-aided guidance and automatic target recognition, as well as a variety of civil applications, are being studied by a number of researchers. Not unlike many other areas of SAR processing, the subject of IFSAR can at first glance appear to be somewhat mysterious. In this paper we show how the mathematics of IFSAR for terrain elevation mapping using a pair of spotlight mode SAR collections can be derived in a very straightforward manner. Here, we employ an approach that relies entirely on three-dimensional Fourier transforms, and utilizes no reference to range equations or Doppler concepts. The result is a simplified explanation of the fundamentals of interferometry, including an easily-seen link between image domain phase difference and terrain elevation height. The derivation builds upon previous work by the authors in which a framework for spotlight mode SAR image formation based on an analogy to three-dimensional computerized axial tomography (CAT) was developed. After outlining the major steps in the mathematics, we show how a computer simulator which utilizes three-dimensional Fourier transforms can be constructed that demonstrates all of the major aspects of IFSAR from spotlight mode collections.

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11 p.

Notes

OSTI as DE94009063; Paper copy available at OSTI: phone, 865-576-8401, or email, reports@adonis.osti.gov

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  • Society of Photo-Optical Instrumentation Engineers conference on intelligent information systems,Orlando, FL (United States),4-8 Apr 1994

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  • Other: DE94009063
  • Report No.: SAND--93-2234C
  • Report No.: CONF-940449--3
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 10136681
  • Archival Resource Key: ark:/67531/metadc1310981

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  • April 1, 1994

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  • Nov. 3, 2018, 11:47 a.m.

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  • Nov. 15, 2018, 2:02 p.m.

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Jakowatz, C. V. Jr.; Wahl, D. E.; Eichel, P. H. & Thompson, P. A. New formulation for interferometric synthetic aperture radar for terrain mapping, article, April 1, 1994; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc1310981/: accessed December 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.