Bistatic Forward-looking SAR Geometrical Positioning and Analysis of Synchronization Error
MEI Haiwen① MENG Ziqiang② LI Yachao① XING Mengdao①
①(National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China) ②(Leihua Electronic Technology Institute, Aviation Industry Corporation of China, Wuxi 214063, China)
Abstract：A geometrical location method based on the R-D principle is proposed. In the case of the location method based on image matching target method will be invalid, when the target area does not have the matching point, such as: sea target, grassland target, etc. First, a geometrical model between the transceiver platform and the target is constructed at the time of center of adjacent synthetic aperture. Then the position information of the target relative of the receiving platform can be solved by combining the relationship between the target in the SAR image and the center point of scene. Finally, according to the characteristic of bistatic forward-looking SAR system, the error models of synchronization errors are built. What is more, through the analysis of the simulation results, the influence of the error on the positioning accuracy is given. Simulation results show the validity of the positioning method and the proposed error models.
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