星载双天线干涉SAR系统总体技术研究

摘要

干涉SAR卫星测绘方式主要有重复轨道多航过干涉SAR、双天线单航过干涉SAR、编队飞行干涉SAR三种方式,其中过双天线单航干涉SAR能够获得较高的干涉测绘效率、较好的高程测量精度.文章针对星载双天线干涉SAR系统开展了轨道高度与高程测绘精度的关系分析、载荷工作机理及高程测量精度分析、天线伸展臂的抖动对干涉性能的影响分析等总体技术研究,并进行了关键技术分析.%According to mapping ways the InSAR satellites include repeated orbit InSAR,dualantenna InSAR and distributed InSAR.The way of dual-antenna InSAR can achieve higher interferometry mapping efficiency.This paper focuses on spaceborne dual-antenna InSAR,researching the system technologies,such as the relationship between the height of orbit and the altitude mapping precision,the payload operation mechanism and altitude mapping precision,and the impact on interferometry performance by the jitter of the antenna arm.Then it analyzes the key technologies of the spaceborne dual-antenna InSAR.