波速误差对浅地层探地雷达SAR算法影响的研究

Impact of velocity error on SAR for subsurface GPR

定性地研究了波速误差对基于Stolt偏移的SAR算法和基于微波全息成像的SAR算法产生的影响,给出波速误差对两种SAR算法方位分辨率影响的关系曲线,得出基于Stolt偏移的SAR算法对波速误差没有基于微波全息成像的SAR算法敏感;当波速小于真实值,两种算法都能得到更好的方位分辨率。并对这些结论进行了合理的物理解释。

The impact of velocity error on SAR algorithm based on Stolt migration and microwave holographic imaging, respectively, is investigated in this paper. The curve of relation between velocity error and azimuth resolution of SAR is given. By analyzing, the conclusions are shown that SAR algorithm based on Stolt migration is not as sensitive to velocity error as SAR algorithm based on microwave holographic imaging, and when velocity is less than real value, both algorithms get better azimuth resolution. The rational physical explanation of the conclusions is also provided.