| Citation: | Bingji ZHAO, Qingjun ZHANG, Chao DAI, Liping LIU, Zhihua TANG, Weiping SHU, Chong NI. A New Prompt 2-D Attitude Steering Approach for Zero Doppler Centroid of GEOsynchronous SAR[J]. Journal of Electronics & Information Technology, 2019, 41(4): 763-769. doi: 10.11999/JEIT180643
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A new prompt 2-D attitude steering approach for zero Doppler centroid of GEOsynchronous SAR (GEOSAR) is proposed. Large yaw angle of GEOSAR in traditional 2-D yaw steering condition can be solved by this method. It is suited to the large satellite such as GEOSAR. The GEOSAR can achieve broadside imaging when this method is applied. Compared to the traditional attitude steering approach, the steering angle and time are just 1/10 of it, and the developing difficulty of GEOSAR becomes lower through this new method. This approach is propitious to GEOSAR. When it is employed to SAR satellites with different altitudes, the residual Doppler centroid is accurate zero in all the conditions. Besides, an attitude selection reference standard is illustrated for different altitude orbital satellites.
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