The Application of the G-matrix Modification Methods to the Imaging of the 1-D Synthetic Aperture Microwave Radiometer [G矩阵修正法在一维综合孔径微波辐射计成像中的应用]

作者：Zhang A.; Liu H.^*; Wu L.; Niu L.; Zhang C.; Chen X.; Wu J.

来源：JOURNAL OF ELECTRONICS & INFORMATION TECHNOLOGY, 2019, 41(11): 2632-2638.

DOI：10.11999/JEITdzyxxxb-41-11-2632

• G-matrix
• Imaging algorithm
• Side-lobed degradation
• Synthetic aperture radiometer

The 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.

• 单位
  中国科学院大学