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Focusing SAR data acquired from non-linear sensor trajectories


Frey, O; Magnard, C; Rüegg, M; Meier, E (2008). Focusing SAR data acquired from non-linear sensor trajectories. In: IEEE International Geoscience & Remote Sensing Symposium , Boston, US, 6 July 2008 - 11 July 2008, 415-418.

Abstract

Standard focusing of SAR data assumes a straight recording
track of the sensor platform. Small non-linearities of airborne platform tracks are corrected for during a motion compensation step while keeping the assumption of a linear flight path. In the following, the processing of SAR data from nonlinear tracks is discussed as may originate from small aircraft or drones flying at low altitude. They fly not a straight track but one dependent on topography, influences of weather and wind, or dependent on the shape of dedicated areas of interest such as rivers or traffic routes. A time-domain backprojection ,based technique, is proposed and evaluated with the help of experimental data featuring a drop in height, a double bend, a 90-degree curve and a linear flight track. In order to assess the quality of the focused data, close-ups of amplitude images are compared and the coherence is evaluated.
The experimental data was acquired by the German Aerospace Center’s E-SAR L-band system.

Abstract

Standard focusing of SAR data assumes a straight recording
track of the sensor platform. Small non-linearities of airborne platform tracks are corrected for during a motion compensation step while keeping the assumption of a linear flight path. In the following, the processing of SAR data from nonlinear tracks is discussed as may originate from small aircraft or drones flying at low altitude. They fly not a straight track but one dependent on topography, influences of weather and wind, or dependent on the shape of dedicated areas of interest such as rivers or traffic routes. A time-domain backprojection ,based technique, is proposed and evaluated with the help of experimental data featuring a drop in height, a double bend, a 90-degree curve and a linear flight track. In order to assess the quality of the focused data, close-ups of amplitude images are compared and the coherence is evaluated.
The experimental data was acquired by the German Aerospace Center’s E-SAR L-band system.

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Additional indexing

Item Type:Conference or Workshop Item (Paper), not refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Geography
Dewey Decimal Classification:910 Geography & travel
Language:English
Event End Date:11 July 2008
Deposited On:20 Jan 2009 16:55
Last Modified:05 Apr 2016 12:45
ISBN:978-1-4244-2808-3
Additional Information:Vol. 4; Copyright 2008 IEEE. Published in the IEEE 2008 International Geoscience & Remote Sensing Symposium (IGARSS 2008), scheduled for July 6-11, 2008 in Boston, Massachusetts, U.S.A. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works, must be obtained from the IEEE. Contact: Manager, Copyrights and Permissions / IEEE Service Center / 445 Hoes Lane / P.O. Box 1331 / Piscataway, NJ 08855-1331, USA. Telephone: + Intl. 908-562-3966.
Publisher DOI:https://doi.org/10.1109/IGARSS.2008.4779746
Official URL:http://www.igarss08.org/
Related URLs:https://www.zora.uzh.ch/4007/
https://www.zora.uzh.ch/4012/
https://www.zora.uzh.ch/9121/

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