【摘要】 星地激光通信测距技术作为一种星地应用的新兴航天测控技术相比传统激光通信技术和激光测距技术,该技术需要在大天顶角条件下运行,以满足航天器长时段观测和定轨需求。本文从大气层的同心球壳模型出发,采用光束追迹法仿真了不同天顶角下的大气折射角和光程变化,并进一步讨论了星地激光通信测距链路运行过程中的大气折射补偿方案,建议在后续星地激光测控技术发展过程中,加强大气折射率分布廓线的实时监测技术研究。更多还原

【Abstract】 LEO-Ground laser communication and ranging is a novel technology for space tracking and command.Compared with the typical laser communication and ranging technology,the unique characteristic of this technology is that the link is running at large zenith angle to meet the demands of long term observation and orbit determination.Atmospheric refraction is a kind of basic atmospheric effects,which obviously influences the link performance at large zenith angle.Based on the concentric shell model of atmosphere,the refraction angle and optical path variation at different zenith angle was simulated by using beam tracking method.And then,the atmospheric refraction compensation scheme for the LEO-Ground laser communication and ranging link was discussed.The research also suggested that the real-time monitoring technology for the profile of atmospheric refraction index was necessary to meet the development of the LEO-Ground laser tracking and command.更多还原