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基于大气传输模型,采用光线传输的实际轨迹对天顶角进行修正处理,得出天顶角随发射角和传输高度的变化复杂函数.并通过仿真分析得到,天顶角与发射角间的偏差随发射角的增大是先增加后减小,在π/4时偏差达到最大;随高度的增加而增大,但到达某一高度时将趋于饱和.相干长度的偏差趋势与天顶角偏差相似.修正后的相干长度总比传统相干长度偏小,因为修正后的天顶角比发射角大.图6,参7.
Based on the atmospheric transmission model, the zenith angle is corrected by the actual trajectory of light transmission, and the complicated function of the zenith angle with the change of transmitting angle and transmission height is obtained. Through the simulation analysis, the deviation between the zenith angle and the transmitting angle With the increase of the angle of incidence, the first increase and then decrease, the maximum deviation at π / 4, the increase with the increase of height, but it will become saturated when reaching a certain height.The deviation trend of coherence length and zenith angle The deviations are similar, and the corrected coherence length is always smaller than the traditional coherence length because the corrected zenith angle is larger than the emission angle.