Precise Topography- and Aperture-Dependent Motion Compensation for Airborne SAR
Macedo, Karlus A. C. and Scheiber, Rolf (2004) Precise Topography- and Aperture-Dependent Motion Compensation for Airborne SAR. IEEE Geoscience and Remote Sensing Letters, 2 (2), pp. 172-176. IEEE Piscataway. DOI: 10.1109/LGRS.2004.842465. ISSN 1545-598X.
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Efficient synthetic aperture radar (SAR) processing algorithms are unable to exactly implement the aperture- and topography-dependent motion compensation due to the superposition of the synthetic apertures of several targets having different motion errors and potentially different topographic heights. Thus, during motion compensation, a reference level is assumed, resulting in residual phase errors that impact the focusing, geometric fidelity, and phase accuracy of the processed SAR images. This letter proposes a new short fast Fourier transform-based postprocessing methodology capable of efficient and precise compensation of these topography- and aperture-dependent residual phase errors. In addition to wide beamwidth (very high resolution) SAR systems, airborne repeat-pass interferometry especially benefits from this approach, as motion compensation can be significantly improved, especially in areas with high topographic changes. Repeat-pass interferometric data of the E-SAR system of the German Aerospace Center (DLR) are used to demonstrate the performance of the proposed approach.
|Title:||Precise Topography- and Aperture-Dependent Motion Compensation for Airborne SAR|
|Journal or Publication Title:||IEEE Geoscience and Remote Sensing Letters|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 172-176|
|Keywords:||Airborne, differential interferomertry (D-InSAR), interferometry, motion errors, synthetic aperture radar (SAR), topography, wide beamwidth.|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W EO - Erdbeobachtung|
|DLR - Research area:||Space|
|DLR - Program:||W EO - Erdbeobachtung|
|DLR - Research theme (Project):||W -- no assignement (old)|
|Institutes and Institutions:||Microwaves and Radar Institute > SAR Technology|
|Deposited By:||Dr.-Ing. Rolf Scheiber|
|Deposited On:||09 Jan 2006|
|Last Modified:||14 Jan 2010 20:37|
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