一种实用化的星机双基地SAR空间同步方法  

A Practical Method for Spatial Synchronization in Spaceborne/Airborne Hybrid Bi-static SAR

作　　者：周鹏[1] 皮亦鸣[1] 

机构地区：[1]电子科技大学电子工程学院

出　　处：《电子与信息学报》2008年第6期1312-1315,共4页Journal of Electronics & Information Technology

基　　金：教育部新世纪优秀人才支持计划(23901019);四川省青年科技基金会(06ZQ026-006)资助课题

摘　　要：由于卫星和飞机在飞行速度上的较大差异,收发平台波束指向的空间同步是星机双基地SAR的一大技术难点。该文在已有文献所提出方法的基础上,考虑了卫星运行在椭圆轨道、地球是一个椭球体、飞机与卫星的飞行方向可能不平行等实际情况,建立了控制收发天线指向的数学模型并推导了相关公式。仿真结果验证了所提出方法的可行性,结果表明:该方法能在保持较高分辨率的前提下获得实用的场景大小。Since there is high difference between the velocities of platforms, the spatial synchronization of the antenna footprints is a big methodical and technological challenge for spaceborne/airborne hybrid bi-static SAR. Based on the method presented in the published literatures, a mathematical model for antenna steering is established and a set of concerned formulae is derived aiming to accommodate the ellipsoidal trajectory of satellites, the ellipsoidal shape of the earth and non-parallel trajectories between the platforms. The practicability of the proposed method is verified by the result of the simulation, which shows that it can achieve useful scene extension in azimuth with an adequate resolution in azimuth.

关 键 词：星机双基地SAR 空间同步 滑动聚束式 波束指向控制 

分 类 号：TN957[电子电信—信号与信息处理]