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| An Airborne SAR Geolocation Approach Based on Sum-difference Beam SAR Imagery |
| Wei Bei-yu Zhu Dai-yin Wu Di Song Wei |
| College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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Abstract As an important technique in both civil and military affairs, airborne SAR absolute positioning can absolutely locate the ground targets without the support of ground reference point. In this paper, a new absolute positioning approach based on the sum-different SAR is presented to determine the locations of ground targets without any reference points. In this approach, three-dimensional coordinate information of ground targets is obtained by monopulse processing between difference and sum channels. Moreover, the influence of parameters mismatch on the accuracy of geolocation is analyzed. The new presented method is compared with SAR geolocation techniques based on the R-D model. Simulation results are provided to show effectiveness of the approach.
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Received: 14 September 2012
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Corresponding Authors:
Wei Bei-yu
E-mail: weibyboy@126.com
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2013, Vol. 35 
