分布式小卫星多中心频率SAR实现宽域二维高分辨率成像

Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology(2009)

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Abstract
分布式小卫星SAR能够打破传统单星SAR测绘带宽和方位分辨率的矛盾.该文分析了一种沿航向排列分布式小卫星宽测绘带二维高分辨率成像技术,每颗卫星同时发射接收不同频率的线性调频信号,先分别在每个子带解方位多普勒模糊,并将方位多普勒中心频率调整至零频,然后在距离向进行子带拼接得到大带宽的线性调频信号从而得到高的距离向分辨率.此外,这种多发多收的工作方式还增加了系统平均发射功率,提高了信噪比.
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Key words
Distributed small satellites SAR,Range sub-band synthesis,Space filtering,Two dimensional high resolution,Wide swath
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