运动平台下X波段雷达海面风向反演算法  

Sea wind direction extraction algorithm by X-band radar in moving platform

作　　者：卢志忠[1] 杨建坡 黄玉[2] 

机构地区：[1]哈尔滨工程大学自动化学院,黑龙江哈尔滨150001 [2]哈尔滨工程大学理学院,黑龙江哈尔滨150001

出　　处：《系统工程与电子技术》2016年第4期799-803,共5页Systems Engineering and Electronics

基　　金：国家自然科学基金(11405035);海洋公益性行业科研专项(201405022-1);国防重点型号科研项目资助课题

摘　　要：船载X波段雷达图像中风条纹的完整性因舰船运动而破坏,影响风条纹法反演海面风向准确性,而利用雷达散射截面反演风向不受雷达载体运动的影响。通过建立雷达散射截面与天线照射方向的谐波函数关系,解决了局部遮挡问题,利用预处理后的雷达图像数据,通过最小二乘法拟合出谐波函数的系数,谐波函数的最大峰值点对应的方向就是反演风向相对航向的角度,再根据此时的航向就可以计算出风向。利用实测数据验证海面风向反演算法,并与船载风向标测得的数据进行比对,结果表明,由雷达散射截面反演出的风向与参考风向基本一致。The integrity of wind streaks in shipborne X band radar images is broken due to ship motion,which exactly affects the accuracy of sea wind direction retrieval by wind streaks.Using radar cross section to obtain the wind direction need not correct the ship motion,and the accuracy is not affected by the radar carrier.The harmonic function that is least-squares fitted to the radar cross section as a function of the antenna look direction after processing the radar images,to solve the problem of partial occlusion,then the angle between extraction wind direction and heading is given by the direction that correspond to the peak of the fitted function,and based on the heading,the wind direction can be calculated.Use real radar data to validate the algorithm of sea wind direction,and compare the results with the data obtained from shipborne dogvane.The results show that the wind direction inversed by radar cross section is basically consistent with the reference direction.

关 键 词：船载X波段雷达数据 海面风向 雷达散射截面 最小二乘法 

分 类 号：TN957.52[电子电信—信号与信息处理]