浅海水下地形SAR成像的速度聚束调制

Velocity bunching modulation of SAR imaging for shallow ocean under water bottom topography

速度聚束调制是浅海水下地形合成孔径雷达(SAR)成像的关键理论,文中对其进行了深入研究。首先从多普勒频移观点论述了速度聚束调制,然后从海浪运动观点,对速度聚束调制重新进行理论推导,指出了两种观点得到结果的异同。最后由理论推导,证明了雷达参数之间需要满足一定的约束条件,才能保证速度聚束调制的准确性。本研究为SAR海洋遥感系统的设计提供了参考。

Velocity bunching modulation is the key theory of SAR（Synthetic Aperture Radar） imaging for shallow ocean under water bottom topography.This paper elaborates velocity bunching modulation from the stand point of Doppler frequency shift firstly. Then theoretical deduction is carried out from the standpoint of moving ocean waves, and the differences and similarities from two standpoints are pointed out. Finally,it is verified by theoretical deduction that radar parameters should satisfy certain stipulation conditions in order to guarantee the accuracy of velocity bunching modulation.This work has provided a reference for the design of SAR ocean remote sensing system.