It’s difficult to capture emission laser beam because the beam is too narrow (about ten to several tensμrad). So the PAT (Pointing, Acquisition, Tracking) technology becomes a key technology in Satellite-to-Ground Laser Communication.
由于激光通信发射光束狭窄(约十到几十微弧度),使接收端捕捉发射光束比较困难,因此PAT技术成为星地激光通信中的关键技术之一。
参考来源 - 卫星光通信终端控制系统设计及摩擦补偿研究·2,447,543篇论文数据，部分数据来源于NoteExpress
星地激光通信中，大气对激光束的影响是需要考虑的重要问题。
In satellite-to-ground laser communication, the effect of atmosphere to laser beam is an important problem.
根据星地激光通信的实际状况，对接收孔径的归一化到达角起伏频谱进行了讨论。
In this paper, we talk about the collection aperture's normalized arrival-of-angle fluctuation spectrum in Satellite-ground laser communication.
实际星地光通信系统的发射光束为高斯型的情况下，跟瞄误差和大气闪烁是星地激光链路中的主要信道噪声源。
The transmitter beam is Gaussian for real satellite-ground laser communication system. The pointing jitter and atmospheric scintillation are the main noise sources for satellite-ground laser link.
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