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| Attitude Estimation for Space Satellite Targets with Multistatic ISAR Systems |
| ZHOU Yejian①② ZHANG Lei①② WANG Hongxian①② XING Mengdao①② NIU Wei③ |
①(National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China)
②(Collaborative Innovation Center of Information Sensing and Understanding, Xidian University, Xi’an 710071, China)
③(State Key Laboratory of Astronautics Dynamics, Xi’an 710043, China) |
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Abstract A new method for attitude estimation for space satellite targets is presented by extracting typical linear structures in ISAR imaging sequence and using information of target’s position in orbits to analyze the three-dimensional attitude of space satellite targets. With the analyzing process for space satellite targets’ geometric structures, the algorithm utilizes Radon transformation to realize the extraction of linear structures, like solar wings, planar antennas, in ISAR imaging sequences. After finishing the relevance of these linear structures among different frames, the angle information of typical linear structures in range-Doppler plane is extracted. At last, with target’s position information in orbits, a matrix sequence of the ISAR range-Doppler projection is acquired to estimate the three-dimensional attitude of linear structures, and realize exact solution of space satellite targets’ attitude. The simulation experiment result illustrates that the algorithm can realize the attitude estimation of typical units in space satellite targets, and the multistatic model algorithm shows its advantage in estimation accuracy.
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Received: 06 June 2016
Published: 13 December 2016
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| Fund: The National Natural Science Foundation of China (61301280, 61301293) |
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Corresponding Authors:
ZHANG Lei
E-mail: leizhang@xidian.edu.cn
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