影响空地激光通信链路通信时段选择方案的背景光及大气湍流效应因素

Background light and atmospheric turbulence affecting the choice of space-to-ground laser communications links and communication time period program

对空地激光通信链路通信时段选择与背景光、大气湍流效应的关系进行了理论分析、仿真及实验研究 ,指出了空地激光通信链路通信时段选择方案一般应遵循的原则 :1)由于夜晚时段大气湍流强度较弱 ,空地激光通信可多选择夜晚时段 ;2 )晴天天气条件下 ,空地激光通信应避免在太阳光强烈的中午时段建立通信 ,建议多使用清晨和下午时段 3 )阴天天气条件下 ,背景光和大气湍流效应对空地激光通信链路的影响较小 ,因此只要链路通信光能量能满足链路功率分配指标要求 。

Theoretical analysis,simulation and experimental study have been done for the relationship between the choice of space-to-ground laser communications links and communication time period program and background light and atmospheric turbulence,the general principle is given for the choice of space-to-ground laser communications links and communication time period program:1)As atmospheric turbulence is weak at night,this period is favored for space-to-ground laser communications.2)when sky is clear,space-to-ground laser communications should be avoided around the midday when sunlight is strong,the periods of morning and afternoon are favored.3)when it is overcast,it is small for background light and atmospheric turbulence to affect space-to-ground laser communications links,so if link communication light power meets the requirement of link power distribution parameters,it is practicable to conduct spact-to-ground laser communications links in the overcast sky.