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Fore and Aft Channel Reconstruction in the TerraSAR-X Dual Receive Antenna Mode

Gabele, Martina and Bräutigam, Benjamin and Schulze, Daniel and Steinbrecher, Ulrich and Tous-Ramon, Nuria and Younis, Marwan (2010) Fore and Aft Channel Reconstruction in the TerraSAR-X Dual Receive Antenna Mode. IEEE Transactions on Geoscience and Remote Sensing, 48 (2), pp. 795-806. IEEE - Institute of Electrical and Electronics Engineers. doi: 10.1109/TGRS.2009.2032920.



The TerraSAR-X satellite is a high resolution synthetic aperture radar (SAR) system launched in June 2007 which provides the option to split the antenna in along-track direction and sample two physical channels separately. Modern SARs are equipped with active phased array antennas and multiple channels. In order to keep costs low TerraSAR-X uses the redundant receiver unit for the second channel such that fore and aft channel signals are combined by a hybrid coupler to form sum and difference channel data. The dual receive antenna mode can either be used to acquire along-track interferometric data or to acquire signals with different polarizations at the same time (Quad pol). Fore and aft channel reconstruction is necessary if ground moving target indication algorithms such as the displaced phase center antenna technique or along-track interferometry shall be applied, and in order to separate the horizontally and vertically polarized received signal components. The proposed approach uses internal calibration pulses from different calibration beams in order to estimate and compensate the hardware impact. The theoretical framework together with the results from the experimental data evaluation for the fore and aft channel reconstruction of the TerraSAR-X dual receive antenna mode are presented. The impact of the receive hardware transformation matrix estimation accuracy on errors in the reconstructed fore and aft channel image data is studied, and first examples on the ground moving target indication capability of the TerraSAR-X dual receive antenna mode are given.

Item URL in elib:https://elib.dlr.de/60268/
Document Type:Article
Additional Information:�©2010 IEEE. 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.
Title:Fore and Aft Channel Reconstruction in the TerraSAR-X Dual Receive Antenna Mode
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:February 2010
Journal or Publication Title:IEEE Transactions on Geoscience and Remote Sensing
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 795-806
Publisher:IEEE - Institute of Electrical and Electronics Engineers
Series Name:IEEE Transactions on Geoscience and Remote Sensing
Keywords:Along-track interferometry (ATI), calibration, dual receive antenna (DRA) mode, ground moving target indication (GMTI), space-based radar, synthetic aperture radar (SAR), TerraSAR-X
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Traffic Management (old)
DLR - Research area:Transport
DLR - Program:V VM - Verkehrsmanagement
DLR - Research theme (Project):V - ARGOS (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Radar Concepts
Microwaves and Radar Institute
Microwaves and Radar Institute > Spaceborne SAR Systems
Deposited By: Gabele, Martina
Deposited On:20 Oct 2009 08:57
Last Modified:31 Jul 2019 19:25

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