Influence of rain attenuation on precise ranging of laser fuze

For the problem of the ranging performance of pulsed laser fuze systems that is descendent in complex environments such as rain, the scattering and attenuation coefficients in the rain are calculated based on the scattering theories of laser in discrete random media. A transmission model of laser pulse in the rain is established using the Monte Carlo approach, and the influences of rain attenuation on the ranging performance are analyzed. The simulation results indicate that the laser pulse is attenuated and extended during the transmission due to the scattering and attenuation of raindrops. When the transmission distance is 500m, the laser energy is attenuated by 44%. The bigger the rain attenuation is, the greater the laser signal attenuation and waveform distortion are. The emission signal with narrow pulse width has small transmission delay and large energy attenuation. The transmission delay increases and the energy attenuation decreases with the increase of the pulse width.