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为适应航天、航空技术的发展和军用激光对抗的需要,本文对激光测距的大气折射订正进行了理论探讨。并以昆明地区近20年的气象资料为依据,拟合了折射率随高度分布的Γ模式。导出了视仰角θ_0≥10°的距离误差公式和流程图。绘制了高度为10km、15km、20km 和30km 的距离修正量。全年平均模型的折射率与高度之间的关系之相对误差不超过9%,距离修正值之精度可达到分米量级。用该折射率模型可以建立各地区的折射修正软件包。
In order to meet the needs of aerospace and aviation technology development and military laser confrontation, this paper discusses theoretically the atmospheric refraction correction of laser ranging. Based on the meteorological data of the past 20 years in Kunming, the Γ mode with refractive index distribution along height was fitted. The distance error formula and flow chart of the apparent elevation angle θ_0≥10 ° are derived. The distance correction amounts of 10km, 15km, 20km and 30km were drawn. The relative error of the annual average model’s refractive index and height is no more than 9%, and the precision of the distance correction value can reach the decimeter level. The refractive index model can be established in all regions of the refractive correction package.