复杂自然场景双站SAR成像模拟

Bistatic SAR image simulation

以单站SAR复杂场景成像模拟的映射投影(MPA)算法为基础,实现三维投影和映射的双站SAR(BISAR)成像模拟。利用条带式BISAR成像的点目标响应解析表示式,在计算得到散射系数图后,模拟BISAR原始信号的产生与压缩,以模拟BISAR图像。经过对虚拟场景的BISAR成像模拟,讨论BISAR对植被、建筑物等复杂地物观测及其与单站SAR的对比。

With the special configuration of different incident and scattering angles for transmitter and receiver platforms, bistatic synthetic aperture radar （BISAR） has emerged as a newly developing technology for space-borne remote sensing and earth observation. The Mapping and Projection Algorithm（MPA） for monostatic SAR image simulation is extended to BISAR observation, and three-dimensional projection and mapping are realized in the image simulation. Employing analytic ex- pression of the point target response for stripmap BISAR imaging, the generation and compression of raw signal from the simulated scattering map are carried out, and finally produce the simulated BISAR image. Using the simulated BISAR images of virtually designed complex scenarios, the images of monostatic SAR and BISARs with different configurations for natural terrain targets, such as vegetation canopy and buildings, are studied and compared with real BISAR image.