单脉冲雷达速度量折射误差高精度修正方法  

High-accuracy method of refraction error correction based on the velocity of monopulse radar

作　　者：张瑜[1] 史莹莹[1] 张洁寒[2] 

机构地区：[1]河南师范大学物理与电子工程学院,河南新乡453007 [2]西安电子科技大学电子工程学院,陕西西安710071

出　　处：《电波科学学报》2015年第3期530-534,共5页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61077037)

摘　　要：单脉冲雷达是高精度外弹道测量系统中的一种主要测量设备之一,为了提高其测量精度,对所有测量参数都需要进行电波折射误差修正.针对目前单脉冲雷达测速参数折射误差修正精度较低的现状,在距离和角度折射误差修正基础上,提出了基于方向余弦的速度量折射误差高精度修正方法.首先根据经折射修正后的目标精确位置,利用二阶中心平滑微分方法求出目标的真实速度向量;然后再利用测站、地心的位置得到目标到雷达站、地心的方向余弦,进而求出目标与雷达站间电波射线在目标处切矢方向余弦;最后进行距离变化率的折射误差修正.实验证明,该方法比常用的直接微分方法的精度高出20%,且具有较好的实用性和有效性.Monopulse radar is one of the main measurement equipments in the exterior ballistic measurement system with high accuracy.In order to improve the accuracy,all measurement parameters are required to carry on wave refraction error correction.For the precision of refraction error correction on the velocity parameter measurement of monopulse radar is low nowadays,the paper points out a high precision refraction error correction method based on the velocity of direction cosine,which is on the basis of refraction error correction of distance and angle.First,according to the precise location of target after the refraction correction,the real velocity vector is obtained by utilizing the second order center smooth derivative method.Then we obtain the direction cosine from the object to radar station and geocentric by utilizing the locations of the survey station and geocentric.And then the target tangent direction cosine of the wave ray between the target and radar station is worked out.Eventually,we carry on refraction error correction of the range rate.The results show that the precision is up to 20% compared with the common direct derivative method,and the method possesses preferable practicability and effectiveness.

关 键 词：单脉冲雷达 速度 距离变化率 折射误差修正 方向余弦 

分 类 号：TN958.4[电子电信—信号与信息处理]