目标高程对SAR图像中目标位置偏差的影响

Effect of Target Height on Target Location Displacement in SAR Imagery

利用合成孔径雷达(Synthetic aperture radar,SAR)干涉技术对目标场景进行三维成像时,目标自身高度会引起其在图像上产生相应的位移,从而导致数字地形高度图(Digital elevation model,DEM)中目标位置与实际观测场景中目标位置存在偏差。本文提出了一种新的雷达地面目标定位方法,通过详细分析雷达图像中目标位移的原因,具体推导了目标在方位向和距离向上的位移量与成像几何,目标高度之间的数学关系,提供了修正目标位置的理论依据。通过仿真实验,证明了本文理论分析的正确性。

The technology of synthetic aperture radar （SAR） the information of the three-dimensional terrain. However, shift of the target position in digital elevation model （DEM）. is proposed. It analyzes the reason of the target displacement matical relation between the target displacement and the SAR tween the target displacement and the target height. Hence, interferometry is used to obtain the height of target produces a A new target location algorithm in DEM, and deduces the mathe- imaging geometry, as well as be- a theoretical basis is provided to correct positioning. The simulation results validate the theoretical analysis.