Estimation of the Minimum Number of Tracks for SAR Tomography

Synthetic aperture radar tomography (SARTom) is the natural extension of SAR interferometry to solve for multiple phase centers within a resolution cell and obtain the 3-D representation of a scene. This paper deals with the determination of the minimum number of tracks required to perform SARTom. T...

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Bibliographic Details
Published in:IEEE transactions on geoscience and remote sensing 2009-02, Vol.47 (2), p.531-543
Main Authors: Nannini, M., Scheiber, R., Moreira, A.
Format: Article
Language:English
Subjects:
Aircraft components
Applied geophysics
Direction of arrival estimation
Earth sciences
Earth, ocean, space
Equivalence
Exact sciences and technology
Geometry
Interferometry
Internal geophysics
Layout
Radar imaging
Radar tracking
Remote sensing
Representations
Resolution cell
Spaceborne radar
superresolution
Synthetic aperture radar
Synthetic aperture radar tomography (SARTom)
system dimension
Target tracking
Tomography
Wave functions
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Description
Summary:Synthetic aperture radar tomography (SARTom) is the natural extension of SAR interferometry to solve for multiple phase centers within a resolution cell and obtain the 3-D representation of a scene. This paper deals with the determination of the minimum number of tracks required to perform SARTom. Through the prolate spheroidal wave functions, the number of equivalent targets of a volumetric source is derived, and from it, the minimum number of observations required to apply subspace superresolution methods is computed. The minimum tomographic aperture length is also investigated. The results are validated on real data acquired in L-band by the experimental SAR system of the German Aerospace Center.
ISSN:0196-2892
1558-0644
DOI:10.1109/TGRS.2008.2007846