基于 MODTRAN 的光波大气透射率模型设计

摘要

由于红外辐射等光波在地球大气中传输会受到大气吸收、散射等作用的影响，因此研究光波在大气中的传输特性成为了一项重要的课题。本文主要通过对可见光和红外波段光波在大气中传输机理的研究，建立透射率模型来反映大气对光波传输的衰减作用。通过仿真计算出各个波段的光波在大气中传输的衰减结果，并利用 MODTRAN 软件计算结果对透射率模型进行比较分析。研究结果表明：透射率模型和 MODTRAN 软件仿真所得光波的透射率都在40％～100％之间变化，且变化曲线趋势一致性较好。所得结果真实有效，对工程实际有一定的作用。%The light waves such as infrared radiation in atmosphere transmission will be affected by atmospheric ab-sorption and scattering,so transmission characteristics research of light waves in atmosphere become very important.Through mechanism research of visible light and infrared light in the atmosphere transmission,the transmission model was established to reflect the atmospheric attenuation effect of light transmission.The attenuation results of different light waves in the atmosphere transmission were calculated by the simulation,and were compared with the results cal-culated by MODTRAN software,and the transmittance model was analyzed.The research results show that the trans-mittances obtained by the transmittance model and MODTRAN software simulation are between 40% and 100%,and the trend of change curve is consistent.The results have a certain reference value for the engineering practice.