激光雷达散射截面测量误差分析

摘要

论述了激光雷达散射截面（LRCS）信息的重要性，从基本定义出发，分析LRCS表达式及其物理意义。依据辐射传输原理和光电探测原理，推导LRCS测量数学模型。依据目标与照射光斑截面大小关系，引入了目标系数δ概念。从目标系数、辐射标定标准选择、激光照射系统性能、激光探测系统性能以及大气环境参数等诸多方面，较全面地分析了测量误差来源，以及减少或修正误差的方法，并以误差树的方式直观地表示了误差来源及影响作用。从测量数据可信性、可交换性和可用性原则出发，提出了测量数据记录要求，并编制了测量数据记录表。对开展激光雷达目标散射特性研究具有重要参考价值。%The importance of information about laser radar cross section (LRCS) is introduced. According to basic conceptions, LRCS expressions and the physical meanings are analyzed. Measurement mathematic models of LRCS are deduced according to the principles of radiation transmission and electro-optical detection. The con⁃cept of target coefficient such as δis imported according to the relationships between targets and the sizes of irra⁃diation faculae section. From some aspects such as target coefficient, criterion choices of radiation calibration, performances of laser irradiation system and laser detection system as well as atmospheric environment parame⁃ters, sources of measurement error and methods for error reducing and correcting are analyzed. And error source and influence are expressed intuitively by error tree. According to the principles of creditability, interchangeabili⁃ty and usability of measurement data, register requirements of measurement data are proposed and register tables of measurement data are programmed. It is an important reference to characteristics research on laser radar target scattering.