1″级四面体组合合作目标激光雷达散射截面实验与理论研究

Experimental and theoretic study on laser radar cross section of the cooperative targets with 1″order corner reflectors

采用激光雷达散射截面（ＬＲＣＳ）测量系统，在１．０６μｍ激光波段，测量了１″级四面体角反射器俯仰角０°时，方位角±５０°范围的ＬＲＣＳ，并对由四面体角反射器组合而成的梯形合作目标进行了俯仰角０°～２４°变化时，方位角±６４°范围的激光雷达散射截面测量，角分辨率１°。给出了实验曲线与数据，实验结果与理论计算较好吻合。表明合理选择角反射器组合形式，保证加工精度，可以增强反射信号，扩大光测范围，实现在恶劣条件下，雷达的远程和大角度范围跟踪。最后讨论了影响测量精度的原因。

Under the radiation of 1.06μm laser beam,the Laser Radar Cross Sec-tion(LRCS)of 1″order corner reflectors have been investigated between-50°～50°azimuth angle when elevation angle is 0°,and the LRCS of the ladder-shaped coopera-tive targets combined with corner reflectors have been measured from-64°～64°azimuth angle as elevation angle range varing from 0°～ 24°by using LRCS measuring system.The angular resolution is 1°.The measured data are reported.The experimen-tal results are in agreement with the theoretical estimate.It indicates that increasing signal intensity and expanding angle of aspect can be controlled by selecting proper com-bined form and ensuring accurary of process.So laser radar tracking is realized in long distance,wide aspect angle under the bad environment. Some influences on the mea-surement are also discussed.