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基于极化面电荷密度和瑞利散射理论,通过数值计算与仿真讨论了风沙静电场对沙粒光学性质的影响。数值结果表明:在考虑风沙静电场作用的情况下,沙粒对电磁波的散射效率随着电荷分布角的增加先增加后减小,而其对电磁波的吸收效率保持恒定,但其值远大于不考虑环境电场作用时的对应值。另外,随着沙尘浓度及其含水量的增加,沙尘暴对电磁波的衰减率增强。结果说明在沙尘暴遥感的研究中必须考虑到沙尘暴中的静电场作用。
Based on the polarizer surface charge density and Rayleigh scattering theory, the influence of the sandstorm electrostatic field on the optical properties of sand was discussed by numerical calculation and simulation. The numerical results show that the sand scattering efficiency of electromagnetic wave first increases and then decreases with the increase of the charge distribution angle, while the absorption efficiency of electromagnetic wave remains constant, but its value is far greater than that of the electromagnetic wave The corresponding value when considering the effect of environmental electric field. In addition, with the increase of dust concentration and water content, the attenuation rate of sandwiched electromagnetic wave is enhanced. The result shows that the electrostatic field in dust storm must be considered in the research of dust storm remote sensing.