基于 MTF的潜航体尾迹 SAR成像仿真

Simulation on the SAR Imaging of Submerged Body Wake Based on Modulation Transfer Function

摘要:

基于水动力学理论和波流弱相互作用理论,运用波作用量谱平衡方程研究了潜航体的尾流场与表面波作用后的表面尾迹,探讨了采用传递变换函数实现表面尾迹 SAR成像的可行性。研究表明,波作用量谱平衡方程能够较准确地计算出潜航体尾流场与表面波之间的非线性相互作用；传递变换函数能够快速有效实现海面后向散射系数到 SAR图像的转换,且保证了较高的精度。

Abstract:

Based on theories of hydrodynamic and weak wave-current interaction, wave action balance equation was used study for emerging surface wake of submerged body. Then the feasibility of realizing SAR imaging of wake by applying to the modulation transfer function(MTF) was discussed. Results showed that non-linear inter. action computed by wave action balance equation was realistic and correct. Moreover,it could realize transforma. tion from NRCS of surface wake to its SAR image by MTF quickly, effectively and accurately.