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First Results of a Joint Bistatic Airborne SAR Experiment

Wendler, M. and Krieger, G. and Horn, R. and Gabler, B. and Dubois-Fernandez, P. and Vaizan, B. and du Plessis, O. (2003) First Results of a Joint Bistatic Airborne SAR Experiment. International Geoscience and Remote Sensing Symposium 2003, Toulouse, 21.-25. Juli.

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Abstract

Future spaceborne SAR systems will operate in bi- and multistatic configurations to gain more information of the illuminated region. Such additional information might be the extraction of bistatic radar cross section or the simultaneous scene acquisition from different bistatic angles. Furthermore, a considerable cost reduction can be achieved by applying one radar illuminator and several passive receivers. For the definition of such SAR configurations, a bistatic airborne SAR experiment is being accomplished between the German Aerospace Center (DLR) and the French “Office National d’Etudes et de Recherches Aerospatiales” (ONERA) with their airborne SAR systems E-SAR and RAMSES. One of the two radar systems serves both as transmitter and receiver while the other is receiving the back-scattered radar echoes. This paper describes the flight configurations for the data takes of the bistatic airborne SAR experiment resulting in different bistatic angles on the ground. Their influence on the processed radar images is shown. Platform motions are analysed, e.g. with respect to the resulting common antenna footprint. A precise GPS time signal is used for the nonrecurring one-time synchronisation of both radar systems directly before data acquisition. To follow this strategy, several modifications have been implemented into the systems which are described in detail. This strategy permits a sufficient phase and timing stability of both the transmitted and received radar signals during the time of a radar data take. Finally, a preliminary processing algorithm for bistatic SAR data is introduced and the status of the resulting radar data processing is presented.

Document Type:Conference or Workshop Item (Speech)
Additional Information: LIDO-Berichtsjahr=2004,
Title:First Results of a Joint Bistatic Airborne SAR Experiment
Authors:
AuthorsInstitution or Email of Authors
Wendler, M.UNSPECIFIED
Krieger, G.UNSPECIFIED
Horn, R.UNSPECIFIED
Gabler, B.UNSPECIFIED
Dubois-Fernandez, P.UNSPECIFIED
Vaizan, B.UNSPECIFIED
du Plessis, O.UNSPECIFIED
Date:2003
Status:Published
Keywords:airborne SAR, bistatic SAR
Event Title:International Geoscience and Remote Sensing Symposium 2003, Toulouse, 21.-25. Juli
Organizer:IEEE
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):UNSPECIFIED
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute
Deposited By: Michael Wendler
Deposited On:16 Sep 2005
Last Modified:06 Jan 2010 19:51

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