讨论了机载激光海洋测深技术中采用红外激光测量海表的精度和探测概率。首先介绍了机载激光测深系统中红外激光测距的原理以及计算方法;分析了不同扫描角、海况(尤其是不同风速)下斜距的测量方法、测量精度及对回波信噪比的影响,分析了在给定探测概率下甄别阈值的选择以及探测概率和信噪比的关系。最后用机载激光测深系统的参数对海表探测进行了数值模拟和讨论,提出了改进措施。 The accuracy and probing probability of using infrared laser to measure sea surface in airborne laser ocean sounding technology are discussed. First of all, the principle and calculation method of infrared laser ranging in airborne laser sounding system are introduced. The measuring methods, measuring accuracy and echo signal-to-noise ratio in different scanning angles and sea conditions (especially different wind speeds) Influence, the choice of the screening threshold at a given probing probability and the relationship between probing probability and signal-to-noise ratio are analyzed. Finally, the parameters of airborne laser sounding system were used to simulate and discuss the sea surface detection, and the improvement measures were put forward.