High resolution 3-D imaging via multi-pass SAR

Homer, J, Longstaff, I D, She, Zhishun and Gray, D A (2002) High resolution 3-D imaging via multi-pass SAR.


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Spaceborne/airborne synthetic aperture radar (SAR) systems provide high resolution two-dimensional terrain imagery. The paper proposes a technique for combining multiple SAR images, acquired on flight paths slightly separated in the elevation direction, to generate high resolution three-dimensional imagery. The technique could be viewed as an extension to interferometric SAR (InSAR) in that it generates topographic imagery with an additional dimension of resolution. The 3-D multi-pass SAR imaging system is typically characterised by a relatively short ambiguity length in the elevation direction. To minimise the associated ambiguities we exploit the relative phase information within the set of images to track the terrain landscape. The SAR images are then coherently combined, via a nonuniform DFT, over a narrow (in elevation) volume centred on the 'dominant' terrain ground plane. The paper includes a detailed description of the technique, background theory, including achievable resolution, and the results of an experimental study

Item Type: Article
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Keywords: Spaceborne/airborne synthetic aperture radar, SAR images, three-dimensional imagery, interferometric, topographic imagery, 3-D multi-pass, nonuniform DFT
Divisions: ?? GlyndwrUniversity ??
Depositing User: ULCC Admin
Date Deposited: 05 Oct 2011 09:14
Last Modified: 11 Dec 2017 20:06
URI: https://glyndwr.repository.guildhe.ac.uk/id/eprint/309

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