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分析了大气散射和吸收特性,并进一步研究了大气散射所引起的激光脉冲延迟效应,定量分析了在不同能见度、不同脉冲传输距离、不同散射系数和单程散射反照率的条件下,大气信道所产生激光脉冲传输延迟时间,为探测误差的校正提供了理论依据。通过对仿真结果的分析可知,在衰减系数不变的条件下,大气信道的散射越严重,散射所造成的路径延迟就越大,激光脉冲传输延迟时间也就越长;而大气的吸收效应越明显,激光脉冲传输延迟时间越短。
The characteristics of atmospheric scattering and absorption were analyzed, and the laser pulse delay effect caused by atmospheric scattering was further studied. The atmospheric channels generated under different visibility, different pulse transmission distances, different scattering coefficients and one-way scattering albedo were quantitatively analyzed. The laser pulse transmission delay time provides a theoretical basis for the correction of the detection error. The simulation results show that under the condition of constant attenuation coefficient, the scattering of the atmospheric channel is more serious, the path delay caused by scattering is larger and the delay time of laser pulse transmission is longer, while the atmospheric absorption effect is more Obviously, the shorter the laser pulse transmission delay time.