The tomographic formulation of spotlight mode synthetic aperture radar extended to three dimensional targets
Abstract
In this paper we take a new look at the tomographic formulation of spotlight mode synthetic aperture radar (SAR), so as to include the case of targets having threedimensional structure. This bridges the work of David C. Munson and his colleagues, who first described SAR in terms of twodimensional tomography, with Jack Walker's original derivation of spotlight mode SAR imaging via Doppler analysis. The main result is to demonstrate that the demodulated radar return data from a spotlight mode collection represent a certain set of samples of the threedimensional Fourier transform of the target reflectivity function, and to do so using tomographic principles instead of traditional Doppler arguments. We then show that the tomographic approach is useful in interpreting the twodimensional SAR image of a threedimensional scene. In particular, the wellknown SAR imaging phenomenon commonly referred to as layover is easily explained in terms of tomographic projection. 4 refs.
 Authors:
 Publication Date:
 Research Org.:
 Sandia National Labs., Albuquerque, NM (United States)
 Sponsoring Org.:
 USDOE; USDOE, Washington, DC (United States)
 OSTI Identifier:
 5127126
 Report Number(s):
 SAND921045C; CONF92091141
ON: DE92013666
 DOE Contract Number:
 AC0476DP00789
 Resource Type:
 Conference
 Resource Relation:
 Conference: Digital signal processing workshop, Starved Rock, IL (United States), 15 Sep 1992
 Country of Publication:
 United States
 Language:
 English
 Subject:
 42 ENGINEERING; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; SYNTHETICAPERTURE RADAR; MATHEMATICAL MODELS; COMPUTERIZED TOMOGRAPHY; FOURIER TRANSFORMATION; IMAGE PROCESSING; INTEGRAL EQUATIONS; SIGNALS; THREEDIMENSIONAL CALCULATIONS; DIAGNOSTIC TECHNIQUES; EQUATIONS; INTEGRAL TRANSFORMATIONS; MEASURING INSTRUMENTS; PROCESSING; RADAR; RANGE FINDERS; TOMOGRAPHY; TRANSFORMATIONS; 420200*  Engineering Facilities, Equipment, & Techniques; 990200  Mathematics & Computers
Citation Formats
Jakowatz, C.V. Jr., and Thompson, P.A. The tomographic formulation of spotlight mode synthetic aperture radar extended to three dimensional targets. United States: N. p., 1992.
Web.
Jakowatz, C.V. Jr., & Thompson, P.A. The tomographic formulation of spotlight mode synthetic aperture radar extended to three dimensional targets. United States.
Jakowatz, C.V. Jr., and Thompson, P.A. 1992.
"The tomographic formulation of spotlight mode synthetic aperture radar extended to three dimensional targets". United States.
doi:.
@article{osti_5127126,
title = {The tomographic formulation of spotlight mode synthetic aperture radar extended to three dimensional targets},
author = {Jakowatz, C.V. Jr. and Thompson, P.A.},
abstractNote = {In this paper we take a new look at the tomographic formulation of spotlight mode synthetic aperture radar (SAR), so as to include the case of targets having threedimensional structure. This bridges the work of David C. Munson and his colleagues, who first described SAR in terms of twodimensional tomography, with Jack Walker's original derivation of spotlight mode SAR imaging via Doppler analysis. The main result is to demonstrate that the demodulated radar return data from a spotlight mode collection represent a certain set of samples of the threedimensional Fourier transform of the target reflectivity function, and to do so using tomographic principles instead of traditional Doppler arguments. We then show that the tomographic approach is useful in interpreting the twodimensional SAR image of a threedimensional scene. In particular, the wellknown SAR imaging phenomenon commonly referred to as layover is easily explained in terms of tomographic projection. 4 refs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1992,
month = 1
}

In this paper we take a new look at the tomographic formulation of spotlight mode synthetic aperture radar (SAR), so as to include the case of targets having threedimensional structure. This bridges the work of David C. Munson and his colleagues, who first described SAR in terms of twodimensional tomography, with Jack Walker`s original derivation of spotlight mode SAR imaging via Doppler analysis. The main result is to demonstrate that the demodulated radar return data from a spotlight mode collection represent a certain set of samples of the threedimensional Fourier transform of the target reflectivity function, and to do somore »

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