大场景多视角成像模式设计

Design of Large-scene and Multi-view Imaging Mode

本文针对多次飞行或聚束模式获取多视角SAR图像效率低的情况,提出了一种新的多视角成像模式,该模式通过一次飞行就可获取到连续大场景的多视角图像。首先给出了大场景多视角成像模式的成像模型,然后基于成像模型分析了不同波束指向的回波时间范围、多普勒频率范围和空域角度范围。在此基础上,提出了大场景多视角成像模式的三种设计思路,并分析了各设计思路对系统的要求与应用场合,为大场景多视角成像模式的三种设计思路指明了应用方向。

In this paper,a new multi view imaging mode is proposed in view of the low efficiency of multi view SAR image acquisition by multi flight or spotlight mode.This mode can obtain multi view images of continuous large scenes by one flight.Firstly,the imaging model of multi-view imaging mode for large scene is given.Then,based on the imaging model,the echo time range,doppler frequency range and spatial angle range of different beam directions are analyzed.On this basis,three design ideas of largescene and multi-view mode are proposed,and the requirements and adaptation occasions of each design idea are analyzed.The application direction of three design ideas of large-scene and multi-view mode is pointed out.