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Efficient SAR Raw Data Compression in Frequency Domain

Fischer, J.V. and Benz, U.C. and Moreira, A. (1999) Efficient SAR Raw Data Compression in Frequency Domain. In: Proceedings of the IEEE Geoscience and Remote Sensing Symposium (IGARSS), Volume, pp. 2261-2263. IEEE Geoscience and Remote Sensing Symposium (IGARSS), 1999-06-28 - 1999-07-02, Hamburg, Germany. ISBN 0-7803-5207-6.

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Abstract

SAR raw data compression is necessary to reduce huge amounts of SAR data for a memory on board a satellite, space shuttle or aircraft and for later downlink to a ground station. In view of interferometric and polarimetric applications for SAR data, it becomes more and more important to pay attention to phase errors caused by data compression. Herein, a detailed comparison of block adaptive quantization in time domain (BAQ) and in frequency domain (FFT-BAQ) is given. Inclusion of raw data compression in the processing chain allows an efficient use of the FFT-BAQ and makes implementation for on-board data compression feasible. The FFT-BAQ outperforms the BAQ in terms of signal-to-quantization noise ratio and phase error and allows a direct decimation of the oversampled data equivalent to FIR-filtering in time domain. Impacts on interferometric phase and coherency are also given.

Document Type:Conference or Workshop Item (Speech, Paper)
Additional Information:LIDO-Berichtsjahr=1999, monograph_id=IEEE Catalog Number: 99CH36293,
Title:Efficient SAR Raw Data Compression in Frequency Domain
Authors:
AuthorsInstitution or Email of Authors
Fischer, J.V.UNSPECIFIED
Benz, U.C.UNSPECIFIED
Moreira, A.UNSPECIFIED
Date:June 1999
Journal or Publication Title:Proceedings of the IEEE Geoscience and Remote Sensing Symposium (IGARSS)
Volume:Volume
Page Range:pp. 2261-2263
ISBN:0-7803-5207-6
Status:Published
Keywords:FFT-BAQ, BAQ, raw data, low pass, on-board processing, frequency domain, FIR-filtering
Event Title:IEEE Geoscience and Remote Sensing Symposium (IGARSS)
Event Location:Hamburg, Germany
Event Type:international Conference
Event Dates:1999-06-28 - 1999-07-02
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):W - Vorhaben Flugzeug-SAR (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > SAR Technology
Institut für Hochfrequenztechnik
Deposited By: Jens Fischer
Deposited On:16 Sep 2005
Last Modified:12 Dec 2013 19:59

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