Research on spatial-variant property of bistatic ISAR imaging plane of space target |
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Authors: | Guo Bao-Feng Wang Jun-Ling Gao Mei-Guo Shang Chao-Xuan Fu Xiong-Jun |
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Affiliation: | Guo Bao-Feng;Wang Jun-Ling;Gao Mei-Guo;Shang Chao-Xuan;Fu Xiong-Jun;Department of Electronic and Optical Engineering, Ordance Engineering College;School of Information and Electronics,Beijing Institute of Technology; |
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Abstract: | The imaging plane of inverse synthetic aperture radar(ISAR) is the projection plane of the target. When taking an image using the range-Doppler theory, the imaging plane may have a spatial-variant property, which causes the change of scatter's projection position and results in migration through resolution cells. In this study, we focus on the spatial-variant property of the imaging plane of a three-axis-stabilized space target. The innovative contributions are as follows. 1) The target motion model in orbit is provided based on a two-body model. 2) The instantaneous imaging plane is determined by the method of vector analysis. 3) Three Euler angles are introduced to describe the spatial-variant property of the imaging plane, and the image quality is analyzed. The simulation results confirm the analysis of the spatial-variant property. The research in this study is significant for the selection of the imaging segment, and provides the evidence for the following data processing and compensation algorithm. |
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