大气波导对舰机数据链通信影响研究

Influence of atmospheric duct on data link communication between ship and helicopter

针对2018年某日某海域出现的一次大气波导过程中舰机数据链中断的现象,利用当时探空小火箭测量的大气温度、湿度廓线计算大气波导,并应用电磁波传播评估方法和通信设备作用距离计算方法对该现象产生的原因进行了分析。结果表明:表面波导能使数据链出现大气波导盲区,从而造成数据链通信中断;大气波导盲区的大小主要是由数据链的频率和表面波导强度两种因素决定。

In view of the interruption of ship-helicopter data link during the occurrence of atmospheric duct on a certain day in 2018,the atmospheric duct was calculated by using the atmospheric temperature and humidity profiles measured by rocketsonde at that time,and the parabolic numerical equation model and the communication equipment coverage evaluation model were used to analyze the maximum distance of data link in the atmospheric duct.The results show that surface ducts cause the blind area of atmospheric duct in the data link,and thus result in the interruption.The size of blind area of atmospheric duct is mainly determined by the frequency of the data link and the strength of the surface duct.