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建立了以恒星目视星等、等效温度为参数的恒星辐射谱模型,使利用恒星数据库进行背景噪声分析变得更加简捷。在此基础之上,分析了恒星自身特点及卫星光通信终端参数对背景噪声的抑制能力,提出并定义了抑制参数Ψ,以评价卫星光通信系统的抗噪性能;同时考虑背景噪声光功率对卫星光通信的影响,给出了补偿方法;分析结果表明,通过提高CCD采样频率、降低光学系统带宽等方法,可以有效地减少恒星噪点,降低恒星背景光对卫星光通信系统的影响。该项工作为进一步优化卫星光通信系统参数,提高其空间运行的稳定性打下了基础。
A stellar radiation spectrum model based on stellar apparent magnitude and equivalent temperature is established, which makes the analysis of background noise using stellar database more concise. On this basis, the characteristics of stellar satellite and terminal parameters of satellite optical communication are analyzed to suppress the background noise, and the parameter Ψ is proposed and defined to evaluate the anti-noise performance of satellite optical communication system. Meanwhile, the background noise optical power pair The results show that by increasing the sampling frequency of CCD and reducing the bandwidth of optical system, it can effectively reduce the star noise and reduce the influence of stellar background light on the satellite optical communication system. This work laid the foundation for further optimization of satellite optical communication system parameters and improvement of the stability of its space operation.