General Calibration Algorithm for Single-transmitting-dual-receiving Polarimetric SAR System

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Abstract The single-transmitting-dual-receiving polarimetric SAR system has only two receving channels, which induces lack of prior information for calibration. Due to the polarization diversity of this kind of system (which operates on different dual and compact polarimetric modes), there has not a general algorithm currently. In this paper, a new general calibration algorithm is proposed for single-transmitting-dual-receiving polarimetric SAR system, which can be widely applied to diverse polarization modes. The transmitting and receiving distortion can be estimated using trihedral, 0° dihedral and 45° dihedral as ideal point targets without any assumption on the scene and system. The basic principle of this new algorithm is induced theoretically. The effect of calibrator error on the distortion estimation is analyzed by simulation. Point targets’calibration results and polarization signatures verify this algorithm.

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	CHEN Lin
	ZHANG Jing-Jing
	LI Yang
	HONG Wen

Key words： Synthetic Aperture Radar (SAR) Single-transmitting-dual-receiving Dual polarimetry Compact Polarimetry (CP) Calibration

Received: 2012-09-04; Published: 2012-09-17

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About author: 陈琳(1983-)，女，博士生，研究方向为简缩极化SAR 信息处理与应用。张晶晶(1986-)，男，博士生，研究方向为极化SAR 定标、混合极化SAR。李洋(1983-)，男，助理研究员，博士研究生，研究方向为极化SAR 信息处理与应用。洪文(1968-)，女，研究员，博士生导师，研究方向为雷达信号处理理论、SAR 成像算法、微波遥感图像处理及其应用等。

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CHEN Lin,ZHANG Jing-Jing,LI Yang et al. General Calibration Algorithm for Single-transmitting-dual-receiving Polarimetric SAR System[J]. JOURNAL OF RADARS, 2012, 1(3): 323-328.

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