脉冲激光探测水下目标回波特性分析研究

The surface layer of the ocean is a major area of activity for underwater organisms and targets, and high accuracy detection of targets in the surface layer of the ocean is a very important topic. In this paper, a semi-analytical Monte Carlo laser radiation transmission simulation model is developed to enable a full-link simulation of the airborne ocean radar echo signal process, and the distribution of the maximum echo radiation intensity with depth underwater for different shapes of targets (including plane, cone, sphere and aspherical surface) is discussed. Based on this, the energy contribution of the cut-off scattering order to the return signal of different targets in the same scenario with multiple scattering processes is analyzed. Finally, the effect of seawater backscattering on the half-width of the pulsed laser echoes and the signal-to-noise ratio of seawater scattering at different depths are analyzed in terms of the pulsed laser echo full width at half maxima (FWHM) and signal-to-noise ratio (SNR), respectively.