| 星载-机载混合BiSAR运动误差的分析 |
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| 引用本文： | 杨永红,皮亦鸣.星载-机载混合BiSAR运动误差的分析[J].测绘学报,2008,37(2):0-249. |
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| 作者姓名： | 杨永红 皮亦鸣 |
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| 作者单位： | 电子科技大学电子工程学院,成都,610054 |
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| 摘 要： | SAR平台的非理想移动和转动包括速度误差和姿态误差，这些误差会造成图像的散焦和分辨率的降低，给图像分类和识别带来一定的困难，从而，影响SAR图像的使用价值和应用范围。针对由混合运动平台构成的BiSAR的非理想移动和转动，建立可以同时描述速度误差与姿态误差的几何模型以及距离方程，并对距离方程进行Taylor多项式的二阶展开，总的运动误差可分解为卫星和飞机的姿态误差、飞机的轴向运动误差以及飞机的姿态误差和轴向运动误差的耦合项。仿真分析表明，卫星和飞机在小干扰情况下，SA—BiSAR运动误差主要是由卫星的姿态误差和飞机的轴向运动误差构成的，而飞机的姿态误差和轴向运动误差的耦合项是可以忽略的。
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| 关 键 词： | 双基地SAR 运动误差 运动补偿 |
| 文章编号： | 1001-1595(2008)02-0163-05 |
| 修稿时间： | 2007年4月3日 |
Motion Error of Spaceborne-airborne Hybrid Bistatie SAR |
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| YANG Yong-hong,PI Yi-ming.Motion Error of Spaceborne-airborne Hybrid Bistatie SAR[J].Acta Geodaetica et Cartographica Sinica,2008,37(2):0-249. |
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| Authors: | YANG Yong-hong PI Yi-ming |
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| Abstract: | Velocity and attitude errors are usually existed in SAR platform,these errors cause images unfocused and resolution loss,image classification and recognition extra difficulty.Its value and application have been affected by motion errors.Aiming at the non-ideal motion and rotation of hybrid platform,the geometry model including velocity and attitude errors and range equation are established.Using Taylor series expanding,total motion errors are consisted of satellite and aircraft attitude error term,aircraft axis-moving error term and cross term of aircraft attitude error and axis-moving error.Simulation experiments are showed that satellite attitude error and aircraft axis-moving error term are major components,coupling term of aircraft attitude error and axis-moving error can be negligible under small disturbing of satellite and aircraft. |
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| Keywords: | bistatic SAR motion error motion compensation |
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