摘要
被动式毫米波孔径合成辐射计是采用稀疏的天线阵来进行干涉成像。成像中可视度的相位误差对成像质量影响很大。给出了影响可视度误差因素的分析,并对整个校准系统进行了结构建模,同时介绍了一种对可视度相位进行实时校准的方法——冗余基线校准法(Redundant Spacing Calibration,简称RSC),仿真了两种天线布局下的校准效果,证明了冗余基线校准方法对被动式毫米波干涉成像中相位误差校准的有效性。
Synthetic aperture radiometer imaging use sparse antennas array for reducing the cost. In this process , phase errors of the visibility function will sharply degrade the imaging quality. This paper presents a detailed analysis of system imperfections and a calibration modeling. Meanwhile, we introduce a real time calibration method-Redundant Spacing Calibration（RSC）. And its simulation result proves that this calibration method is very efficient under the two kinds of antenna arrays.
出处
《遥感技术与应用》
CSCD
2007年第2期297-300,共4页
Remote Sensing Technology and Application
关键词
毫米波成像
校准
冗余基线校准(RSC)
相位环
Passive imaging, Phase calibration, Redundant Spacing Calibration（RSC）, Phase closure
