基于末制导雷达的海面舰船ISAR成像转角分析

Analysis of Rotation Angle Condition in Ship Target ISAR Imaging Based on Terminally Guided Missile-Borne Radar

针对末制导雷达对舰船目标ISAR成像中导引头不同飞行轨迹所能获得的转角问题展开研究。在末制导雷达平台和舰船目标同时运动的情况下,ISAR成像总转角由两部分组成:舰船航行、晃动所导致的转角和导引头飞行形成的转角。本文在对弹目相对总转角建模的基础上,通过估计舰船晃动参数来计算总转角,提出了基于该总转角的成像转角判断条件。仿真结果表明,本文提出的方法能有效估计成像时间内的总转角,并据此判断出弹目转角是否满足ISAR成像的转角条件。

Rotational angle condition in ship target ISAR imaging based on terminally guided missile-borne radar is investigated.When both radar motion and ship motion coexist,the total rotational angle consists of the angle contributed by missile flight and the angle caused by ship swing.Based on our model of the total rotational angle between the missile and the ship target,the total rotation angle used to judge the ISAR rotation angle condition is then computed via estimation of ship swing parameters.The experimental results show the proposed approach can effectively obtain the total rotational angle,as a result,it can be successfully adopted to analyze the rotation angle condition of the terminally guided missile-borne radar ISAR imaging of the ship target.