不同大气高度紫外光单次散射链路模型研究

Study on Ultraviolet Single Scattering Link Model at Different Atmosphere Height

摘要:

针对不同海拔的大气散射区域对紫外激光单次散射链路的影响，综合考虑气压、温度及臭氧浓度三个因素，对紫外光单次散射链路模型进行了修正。在此基础上，首先计算紫外激光通信系统在0~28km高空范围内的链路损耗。其次，在链路损耗最小条件下，分析通信距离、通信终端仰角以及发散角三者的相互关系。结果表明，收发端设置在高空0~15km的链路损耗较低，15~21km的链路损耗剧增。发射端仰角和通信距离的增大分别导致链路损耗增加；损耗最小时，发射端仰角与发散角近似呈线性关系，通信距离对该关系无明显影响。

Abstract:

Aimed at the effects of scattering range at different atmosphere height on ultraviolet single scattering link, considering air pressure, temperature and ozone thickness, the single scattering link model was corrected. Based on which, the path loss of ultraviolet communication setted at the height of 0~28 was calculated first. And then, relationships between elevation angle, divergence angle and communication distance were analyzed for the condition of the lowest path loss. Results show that the path loss is lower at the height of 0~15km and increases quickly at the height of 15~21km. Increase in both elevation angle and communication distance results in path loss rising. Under the condition of the lowest path loss, the elevation angle and divergence angle approximately show a linear relationship and there is no noticeable influence of communication distance on the relationship.