摘要
大气信道对星地光学链路影响较大,通常云层导致的衰减可能会高达几十分贝,光学链路必须在视线内无云情况下工作.因此在设计激光通信系统并进行地面站选址时,必须要考虑链路可用度问题.结合云层数据提出一种可用度计算简单模型,对我国不同城市气象站数据进行统计分析,得出不同城市十年间可用度数据,为我国星地光通信地面站选址提供一定依据。
The satellite-to-ground optical link is greatly influenced by atmosphere, the intensity of laser beam would attenuate up to tens of dB after transmitting through the clouds, which induces that the laser communication system should work under visually cloud-free condition. So optical link availability must be considered when the optical communication system is designed and the ground station location is selected. Based on ten years’ statistical data of cloud cover in different cities across our country, the usability of ground station is calculated by using a simple model. The result can provide suggestions for selecting satellite-to-ground optical communication ground station location.
出处
《大气与环境光学学报》
CAS
2014年第3期169-172,共4页
Journal of Atmospheric and Environmental Optics
关键词
星地光通信
地面站选址
可用度
satellite-to-ground optical communication
ground station location
availability
