一维综合孔径辐射计相位定标研究

doi:10.12263/DZXB.20210413

电子学报 ›› 2022, Vol. 50 ›› Issue (9): 2127-2133.DOI: 10.12263/DZXB.20210413

一维综合孔径辐射计相位定标研究

董健, 栾英宏(), 赵永涛(), 孙彦龙(), 冯剑锋(), 姜丽菲(), 赵锋(), 徐红新

上海航天电子技术研究所，上海 201109

收稿日期:2021-03-30 修回日期:2021-12-14 出版日期:2022-09-25
- 作者简介:
- 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.
- 基金资助:
- 科工局十三五科技创新预研课题

Research on Phase Calibration for One-Dimensional Synthetic Aperture Radiometer

DONG Jian, LUAN Ying-hong(), ZHAO Yong-tao(), SUN Yan-long(), FENG Jian-feng(), JIANG Li-fei(), ZHAO Feng(), XU Hong-xin

Aerospace Electronic Technology Institute，Shanghai 201109，China

Received:2021-03-30 Revised:2021-12-14 Online:2022-09-25 Published:2022-10-26

摘要/Abstract

摘要：

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°.

关键词: 一维综合孔径微波辐射计, 海面亮温, 相位定标, 可见度函数, 点源, 噪声源

Abstract:

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°.

Key words: one-dimensional synthetic aperture radiometer, sea surface brightness temperature, phase calibration, visibility function, point source, noise source

中图分类号:

TP722.6

董健, 栾英宏, 赵永涛, 孙彦龙, 冯剑锋, 姜丽菲, 赵锋, 徐红新. 一维综合孔径辐射计相位定标研究[J]. 电子学报, 2022, 50(9): 2127-2133.

DONG Jian, LUAN Ying-hong, ZHAO Yong-tao, SUN Yan-long, FENG Jian-feng, JIANG Li-fei, ZHAO Feng, XU Hong-xin. Research on Phase Calibration for One-Dimensional Synthetic Aperture Radiometer[J]. Acta Electronica Sinica, 2022, 50(9): 2127-2133.

图/表 9

图1 一维综合孔径辐射计二接收单元示意图

图2 一维综合孔径微波辐射计样机

图3 综合孔径辐射计接收链路相位示意图

图4 实验场地示意图

图5 H极化的6条基线的归一化可见度函数幅度.绿色表示点源开启、红色表示点源关闭、蓝色表示噪声源开启

图6 H极化的6条基线的干涉条纹.红色表示干涉条纹实部、蓝色表示干涉条纹虚部,绿色表示干涉条纹幅度

图7 不同基线在不同位置的固定相位误差

表1 暗室内测量的每条基线的相位与相位定标实验测量的相位比较

基线	均方根误差/(°)
1	2.18
2	1.81
3	1.55
4	2.21
5	2.77
6	2.28
均值	2.13

图8 重构出的点源图像

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一维综合孔径辐射计相位定标研究

Research on Phase Calibration for One-Dimensional Synthetic Aperture Radiometer

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