NDLI: Precise topography- and aperture-dependent motion compensation for airborne SAR

Content Provider	IEEE Xplore Digital Library
Author	de Macedo, K.A.C. Scheiber, R.
Copyright Year	2004
Abstract	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.
Sponsorship	IEEE Geoscience and Remote Sensing Society
Starting Page	172
Ending Page	176
Page Count	5
File Size	1309482
File Format	PDF
ISSN	1545598X
Volume Number	2
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Motion compensation Focusing Synthetic aperture radar Interferometry Surfaces Azimuth Layout Data processing Sensor phenomena and characterization Radar tracking wide beamwidth Airborne differential interferomertry (D-InSAR) interferometry motion errors synthetic aperture radar (SAR) topography
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Geotechnical Engineering and Engineering Geology

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