Calibration of spaceborne CTLR compact polarimetric low-frequency SAR using mixed radar calibrators

Chen, J. and Quegan, S. (2011) Calibration of spaceborne CTLR compact polarimetric low-frequency SAR using mixed radar calibrators. IEEE Transactions on Geoscience and Remote Sensing, 49 (7). pp. 2712-2723. ISSN 0196-2892

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Abstract

Spaceborne synthetic aperture radar (SAR) systems operating at lower frequencies, such as P-band, are significantly affected by Faraday rotation (FR) effects. A novel algorithm for calibrating the circular-transmit-and-linear-receive (CTLR) mode spaceborne compact polarimetric SAR using mixed calibrators is proposed, which is able to correct precisely both FR and radar system errors (i.e., channel imbalance and crosstalk). Six sets of mixed calibrators, consisting of both passive calibrators and polarimetric active radar calibrators (PARCs), are investigated. Theoretical analysis and simulations demonstrate that the optimal calibration scheme combines four polarimetric selective mixed calibrators, including two gridded trihedrals and two PARCs, together with total-electron-content measurements by the Global Navigation Satellite System system.

Item Type:	Article
Copyright, Publisher and Additional Information:	© 2011 IEEE-INST. This is an author produced version of a paper subsequently published in IEEE Transactions on Geoscience and Remote Sensing. Uploaded in accordance with the publisher's self-archiving policy.
Keywords:	Calibration; compact polarimetry; Faraday rotation (FR); ionosphere; synthetic aperture radar (SAR)
Academic Units:	The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematics and Statistics (Sheffield)
Depositing User:	Miss Anthea Tucker
Date Deposited:	02 Aug 2011 09:01
Last Modified:	08 Feb 2013 17:33
Published Version:	http://dx.doi.org/10.1109/TGRS.2011.2109065
Status:	Published
Publisher:	Institute of Electrical and Electronics Engineers
Refereed:	Yes
Identification Number:	10.1109/TGRS.2011.2109065
URI:	http://eprints.whiterose.ac.uk/id/eprint/43175

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