一种弹载SAR运动补偿中偏差量的测量方法

A Method for Measuring Deviation Used in Missile-Borne SAR Motion Compensation

为了提高SAR成像的分辨率,提出了一种基于导弹质心位置SINS/SAR/CNS的导航数据来取代GPS测量数据实现对天线相位中心处IMU的校正,从而精确测量SAR运动补偿中偏差量的方法。通过SAR天线运动偏差曲线图可以清晰地看出,该方法能够有效地限制IMU导航解算的发散,偏差量的绝对测量精度和相对测量精度均能满足SAR对运动补偿精度的要求。

In order to improve SAR imaging resolution, this paper presents a method to correct IMU in antenna phase center using SINS/SAR/CNS navigation data instead that of GPS , so as to measure more accurate deviation of SAR motion compensation .The motion deviation curves of SAR antenna clearly show that this method is effective to restrict the divergent of IMU navigation measurements , and both the abso-lute measurement precision and relative measurement precision of motion deviation can meet the require -ment of SAR motion compensation.