上海航天电子技术研究所,上海 201109
[ "董 健 男,1982年12月出生于安徽省铜陵市,博士. 现为上海航天电子技术研究所高级工程师. 获上海市科技进步特等奖1项. 在国内外发表学术论文20余篇.E-mail: triumphdj@126.com" ]
栾英宏 女,1983年6月出生于山西太原,博士. 现为上海航天电子技术研究所高级工程师,从事微波遥感方面的研究工作. E-mail: lyhongO613@hotmail.com
赵永涛 男,1993年2月出生于福建宁德, 研究生. 从事微波遥感方面的研究工作. E-mail: zhaoyongtao@804.sast.casc
孙彦龙 男,1988年4月出生于山西运城, 研究生. 从事微波遥感方面的研究工作. E-mail: zlinhwj@126.com
冯剑锋 男,1988年7月出生于湖北黄岗, 研究生. 从事数字信号处理方面的研究工作.E-mail: fengjianfengbuaa@sina.com
姜丽菲 女,1983年3月出生于辽宁抚顺, 研究生. 从事微波遥感方面的研究工作. E-mail: jianglf2006@126.com
赵锋 男,1972年10月出生于新疆乌鲁木齐, 博士. 从事微波遥感方面的研究工作.E-mail: zhao_xiang_feng@tom.com
徐红新 男,1979年3月出生于江苏南通, 从事微波遥感方面的研究工作.
收稿:2021-03-30,
修回:2021-12-14,
纸质出版:2022-09-25
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董健,栾英宏,赵永涛等.一维综合孔径辐射计相位定标研究[J].电子学报,2022,50(09):2127-2133.
DONG Jian,LUAN Ying-hong,ZHAO Yong-tao,et al.Research on Phase Calibration for One-Dimensional Synthetic Aperture Radiometer[J].ACTA ELECTRONICA SINICA,2022,50(09):2127-2133.
董健,栾英宏,赵永涛等.一维综合孔径辐射计相位定标研究[J].电子学报,2022,50(09):2127-2133. DOI: 10.12263/DZXB.20210413.
DONG Jian,LUAN Ying-hong,ZHAO Yong-tao,et al.Research on Phase Calibration for One-Dimensional Synthetic Aperture Radiometer[J].ACTA ELECTRONICA SINICA,2022,50(09):2127-2133. DOI: 10.12263/DZXB.20210413.
相位是一维综合孔径辐射计获得高精度海面亮温的关键因素.传统的一维综合孔径辐射计的相位标定方法难以满足高精度相位定标需求,本文提出一种基于外部点源和内部噪声源相结合的相位定标方法.首先通过不同位置的外部点源和内部噪声源获得不同方位角上接收链路的固定相位差;接着通过内部噪声源获得接收链路的可变相位差;最后综合利用此两种相位差进行相位定标.本方法将固定相位误差和变化相位误差相分离,具有定标精度高、重复性好、节约定标时间的优点.实验表明本方法相位定标精度约为0.7°、重复性约为0.35°.
Phase is important for acquiring the high sea surface brightness temperature with high accuracy. The traditional phase calibration methods for one-dimensional synthetic aperture radiometer are difficulty to meet the requirements. This paper proposes a phase calibration method. Firstly
the fixed phase difference of receiving chain at different position is acquired by external point source and internal noise source. Then
the variable phase difference of receiving chain is acquired by internal noise source. Finally
the phase is calibrated by the two kinds of phase difference. This method separates the fix phase error and variable phase error
and has advantages of high accuracy
good repeatability and saving calibration time. The experiment results indicate that the accuracy is better than 0.7° and the repeatability is better than 0.35°.
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