Journal Article10.1109/PROC.1983.12698
A tomographic formulation of spotlight-mode synthetic aperture radar
David C. Munson,J. D. O'Brien,W.K. Jenkins +2 more
- 01 Aug 1983
- Vol. 71, Iss: 8, pp 917-925
787
TL;DR: In this article, a projection-slice theorem from computer-aided tomograpy (CAT) is used to analyze the signal recorded at each SAR transmission point, which is modeled as a portion of the Fourier transform of a central projection of the imaged ground area.
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Abstract: Spotlight-mode synthetic aperture radar (spotlight-mode SAR) synthesizes high-resolution terrain maps using data gathered from multiple observation angles. This paper shows that spotlight-mode SAR can be interpreted as a tomographic reeonstrution problem and analyzed using the projection-slice theorem from computer-aided tomograpy (CAT). The signal recorded at each SAR transmission point is modeled as a portion of the Fourier transform of a central projection of the imaged ground area. Reconstruction of a SAR image may then be accomplished using algorithms from CAT. This model permits a simple understanding of SAR imaging, not based on Doppler shifts. Resolution, sampling rates, waveform curvature, the Doppler effect, and other issues are also discussed within the context of this interpretation of SAR.
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Citations
First demonstration of airborne SAR tomography using multibaseline L-band data
Andreas Reigber,Alberto Moreira,Kostas Papathanassiou +2 more
- 28 Jun 1999
TL;DR: The authors present the concept of aperture synthesis for 3D-imaging for the case of the multibaseline imaging geometry and discuss the limits arising from the limited number of flight tracks and their irregular spatial distribution.
831
Sparsity and Compressed Sensing in Radar Imaging
Lee C. Potter,Emre Ertin,Jason T. Parker,Mujdat Cetin +3 more
- 25 Feb 2010
TL;DR: The accessible framework provided by compressed sensing illuminates the impact of joining these themes and potential future directions are conjectured both for extension of theory motivated by practice and for modification of practice based on theoretical insights.
822
Developments in Radar Imaging
TL;DR: A review of the range-Doppler technique is presented along with a description of radar imaging forms including details of data acquisition and processing techniques.
798
•Journal Article
Dictionary Learning
Ivana Tosic,Pascal Frossard +1 more
TL;DR: Methods for learning dictionaries that are appropriate for the representation of given classes of signals and multisensor data are described and dimensionality reduction based on dictionary representation can be extended to address specific tasks such as data analy sis or classification.
797
Feature-enhanced synthetic aperture radar image formation based on nonquadratic regularization
TL;DR: This work develops a method for the formation of spotlight-mode synthetic aperture radar (SAR) images with enhanced features based on a regularized reconstruction of the scattering field which combines a tomographic model of the SAR observation process with prior information regarding the nature of the features of interest.
625
References
•Book
Introduction to Radar Systems
Merrill I. Skolnik
- 01 Jan 1962
TL;DR: This chapter discusses Radar Equation, MTI and Pulse Doppler Radar, and Information from Radar Signals, as well as Radar Antenna, Radar Transmitters and Radar Receiver.
7.5K
Range-Doppler Imaging of Rotating Objects
TL;DR: In this article, the effects of various system aberrations are investigated and experimental results from a microwave test range which demonstrate the image improvement are presented, along with an analysis of the three-dimensional radar/object geometry with separate source and receiver locations.
753
Multiphoton Dissociation of Polyatomic Molecules.
J. L. Walker
- 01 Jan 1980
TL;DR: Range-Doppler imaging radar can be improved by storing the Fourier transform of the object reflectivity density in the return pulse, and the angular coordinates of the antenna.
539
Tutorial review of synthetic-aperture radar (SAR) with applications to imaging of the ocean surface
K. Tomiyasu
- 01 May 1978
TL;DR: In this article, a synthetic aperture radar (SAR) is used to produce high-resolution two-dimensional images of mapped areas, where the amplitude and phase of received signals are collected for the duration of an integration time after which the signal is processed.
415
Image Reconstruction from Projections
Gabor T. Herman
- 01 Jan 1979
TL;DR: In this article, the problem of reconstruction of structures from data collected based on transmitted or emitted radiation is addressed, and a wide range of areas, such as X-ray CT, emission tomography, photon migration imaging, electron microscopic reconstruction, etc.
294