机载顺轨干涉合成孔径雷达定标中地面控制点的布设策略研究  

Study on Ground Control Point Locating Strategy for Airborne Along-track Interferometric SAR

作　　者：张慧[1,2,3] 洪峻[1] 王宇[1] 李纪传[1,2] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院大学,北京100049 [3]空间信息处理与应用系统技术重点实验室,北京100190

出　　处：《电子与信息学报》2015年第7期1716-1722,共7页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61101200)资助课题

摘　　要：机载顺轨干涉合成孔径雷达(ATI-SAR)估计运动目标径向速度的精度受干涉相位误差、基线分量误差等影响,因此为了得到较高的测速精度必须对ATI-SAR的系统参数进行定标处理。基于敏感度方程的定标方法是干涉SAR定标中的常用方法,但是其性能受敏感度矩阵条件数的影响,地面控制点(GCP)或角反射器的布设方式决定了敏感度矩阵的条件数大小。该文通过分析给出机载ATI-SAR系统定标中GCP的布设策略,包括静止GCP的布设方式及运动GCP的数量、布设位置、运动速度大小和方向的设置原则,并通过仿真手段对上述布设策略进行了验证。The accuracy of the radial velocity estimated by the airborne Along-Track Interferometric SAR （ATI-SAR） is affected by the accuracy of different system parameter, such as the interferometric phase biases and the baseline components errors. Therefore, these factors must be calibrated if the higher radial velocity estimation accuracy is required. The calibration methods based on the sensitivity equations are generally used in the interferometric SAR calibration. However, the performance of these methods is limited by the matrix condition number of the sensitivity matrix, which is decided by the location strategy of Ground Control Points （GCP）. This study analyses and simulates the condition number of the sensitivity matrix corresponding to the different GCP distribution ways along the swath as well as the different selections of velocities and positions of moving ground control points.

关 键 词：合成孔径雷达 顺轨干涉 定标 地面控制点 矩阵条件数 

分 类 号：TN959.73[电子电信—信号与信息处理]