背景散射对LRCS测量精度的影响分析

针对激光雷达散射截面的测量精度，指出测量中存在的背景散射问题。给出了激光雷达散射截面的测量方程，分析了地面、支撑架等背景散射对激光雷达散射截面测量精度影响的机理。根据测量方程和影响机理提出了敷设消光材料、多次比对测量、尺寸匹配等方法，并对敷设消光材料法进行了实验验证。实验表明：所用方法能够有效地减小背景散射，提高激光雷达散射截面的测量精度。

Influence of background scattering on measurement accuracy of laser radar cross section

To improve the measurement accuracy of laser radar cross section (LRCS), the background scattering existing in the measurement is pointed out. The equation for measuring LRCS is presented. The mechanism for the effects of the background scattering from the ground and supporting frame on the measurement accuracy was analyzed. According to the equation and the mechanism, the methods to reduce the background scattering, which include extinction material coating, multi-contrasting measurement, size matching, are put forward. The method of the extinction material coating was verified by experiment. The experimental results show that the method could effectively reduce the background scattering and improve the measurement accuracy.