用分布式小卫星提高星载SAR的方位向分辨率

通过分析传统星载合成孔径雷达 (SAR)在提高方位向分辨率时所遇到的困难 ,提出一种利用分布式小卫星提高星载SAR方位分辨率的方法。该方法把多个卫星天线的波束进行相干合成 ,从而达到增加合成孔径长度 ,提高方位向分辨率的目的。同时详细给出了该方法的原理和实现步骤。计算机仿真结果表明了该方法的有效性。最后 ,还指出有待进一步考虑的问题。

Using Distributed Small Satellite System to Improve Azimuth Resolution of Spaceborne SAR

After an analysis is made on the difficulties of traditional spaceborne SAR system in azimuth resolution improvement, a method which utilizes distributed small satellites to solve these difficulties is proposed. In this method, by synthesizing coherently the beams radiated by several satellites antennas, a large synthetic aperture is achieved, and the azimuth resolution is improved. The principle and implementation steps are presented in detail. The computer simulation shows the effectiveness of this method. The problems to be considered further about this method are addressed at last.