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G矩阵修正法在一维综合孔径微波辐射计成像中的应用
Alternative TitleThe Application of the G-matrix Modification Methods to the Imaging of the 1-D Synthetic Aperture Microwave Radiometer
张爱丽; 刘浩; 武林; 牛立杰; 张成; 陈雪; 吴季
Department微波遥感部
Source PublicationDianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology
2019
Volume41Issue:11Pages:2632-2638
DOI10.11999/JEIT181067 
ISSN1009-5896
Language中文
Keyword综合孔径辐射计 成像算法 G矩阵 旁瓣恶化
Abstract1维综合孔径微波辐射计通常会采用G矩阵模型法来实现亮温图像的重建。对于1维辐射计系统,成像过程主要包含:辐射计仪器观测2维全视场的目标场景亮温,得到1维的可见度函数采样值,再通过对系统参数矩阵G求逆来实现目标场景的1维图像重建。由于1维辐射计系统的采样基线只分布在空间频率域的1个维度上,所以在图像重建过程中,需要实现矩阵G从2维到1维的转换。对此,该文提出了两种适用于1维综合孔径微波辐射计成像的G矩阵修正方法。并针对目前已经完成的8单元辐射计地面样机系统和目前正在研制的10单元盐度计样机系统,通过理论分析和仿真实验,验证了G矩阵修正法对1维综合孔径微波辐射计成像结果的改善效果,以及对天线方向图旁瓣恶化所引入成像误差的有效抑制。
Other AbstractThe G-matrix model method is usually used to achieve the brightness temperature reconstruction for the one-Dimensional (1-D) synthetic aperture microwave radiometer system. For the 1-D radiometer system, the imaging process mainly includes: the radiometer instrument observes the full field of view of the 2-D target scene maps, and obtains the 1-D samples of the visibility, and then inverts the system parameter matrix G to realize the reconstruction of the 1-D image of the target scene. Since the system sampling baselines are only distributed in the 1-D of the spatial frequency domain, in the process of the brightness temperature image reconstruction, the matrix G needs to realize 2-D to 1-D conversion. Therefore, two G-matrix modification methods are proposed to improve the imaging quality for the 1-D synthetic aperture microwave radiometer. For the 8-element ground radiometer prototype system and the 10-element salinity radiometer system, theoretical analysis and simulation experiments have verified that the G-matrix modification methods proposed in this paper can effectively improve the imaging results, and can effectively suppress the imaging error caused by the side-lobed degradation of the antenna patterns. © 2019, Science Press. All right reserved.
Indexed ByEI
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7262
Collection微波遥感部
Recommended Citation
GB/T 7714
张爱丽,刘浩,武林,等. G矩阵修正法在一维综合孔径微波辐射计成像中的应用[J]. Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology,2019,41(11):2632-2638.
APA 张爱丽.,刘浩.,武林.,牛立杰.,张成.,...&吴季.(2019).G矩阵修正法在一维综合孔径微波辐射计成像中的应用.Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology,41(11),2632-2638.
MLA 张爱丽,et al."G矩阵修正法在一维综合孔径微波辐射计成像中的应用".Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology 41.11(2019):2632-2638.
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