本文对机载激光扫描测距系统的探测信号功率、背景噪声、信噪比等性能以及它们之间的关系等进行了定量化的评估和定性的分析, 探讨了探测信噪比与测量距离、恒虚警概率探测时阈值/噪声比等问题, 为机载激光扫描测距系统在遥感和测绘中的使用及系统性能的改进提供了科学的参考依据, 其分析方法具有普遍意义, 可用于不同的机载或星载激光扫描测距系统的分析。

A method for quantitative evaluation and qualitative analysis to the performance such as detected backscattering signal, optical background noise and signal-to-noise ratio(SNR) of the airborne laser scanning rangefinder is proposed. The problems such as the relations between SNR and detected signal, background noise and detected range are discussed. The ratio of threshold-to-noise for constant probability of false alarm is also given. All of these can be used as a scientific basis for the use in the fields of remote sensing as well as surveying and for the improvement of airborne laser scanning ranging system, the analysis method can be generalized for different airborne or satellite carried laser scanning rangefinder.