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.