INS/双天线弹载SAR组合弹体定位技术  

Missile Geo-Location Using INS and Dual-Antenna Missile-Borne SAR

作　　者：秦玉亮[1] 黄宗辉[1] 邓彬[1] 王宏强[1] 黎湘[1] 

机构地区：[1]国防科技大学电子科学与工程学院空间电子信息技术研究所,湖南长沙410073

出　　处：《电子学报》2009年第6期1216-1221,共6页Acta Electronica Sinica

基　　金：武器装备预研基金(No.9140A03020408KG0109)

摘　　要：针对弹载景象匹配SAR应用中的弹体定位问题,提出了基于INS/双天线SAR的组合弹体定位技术,通过加装一部向下照射的天线系统,在对典型地物成像的同时实现了对弹体离地面高度的测量.首先介绍了其定位原理,然后推导了利用相对距离、多普勒和弹体高度的定位模型,给出了导弹高度测量误差对定位误差影响的关系式,针对不同的地形起伏,分别提出了基于迭代和地形匹配的弹下点高程误差消除方法,最后分析了双天线定位方法对雷达系统的要求.对典型场景的仿真表明,该定位方法相比利用INS高度通道数据和气压高度计进行定位误差明显减小.An INS/dual-antenna integrated missile positioning method is presented to overcome the problem of lacking of positioning information in SAR scene matching application.While imaging ground objects,it is capable of measuring the height of the missile via an additional antenna system with downward beam. The positioning principle is introduced firstly and then the positioning model using relative range, Doppler frequency and the missile altitude is derived. The effects of the missile altitude measurement error on the positioning error are also given. In the next part, the method for reduction of errors resulting from the terrain elevalion exactly below the missile is presented based on iteration and terrain matching, respectively, for varied hypsography, The radar system requirements of dual-antenna positioning are analyzed in the end. The simulation results show that the positioning error of the above techniques is remarkably smaller than that of using INS and barometric altimeter.

关 键 词：弹载合成孔径雷达 弹体定位 地形导航 

分 类 号：TN957[电子电信—信号与信息处理]