摘要
1 064 nm波长大气透过率高、天空背景辐射小,采用该波长激光开展卫星测距,有助于提升测距系统的探测能力,已成为国际测距技术的重要发展趋势之一。采用2.2 nm窄带滤光片,计算并测试了白天情况下1 064 nm波长测距系统的噪声,验证了该滤光片在白天对背景噪声的抑制效果。基于圆心光路调节方法,夜间借助红外相机实现了1 064 nm波长激光发射光路与机械轴的重合度调节,保证了全天区优于5″的激光指向精度,解决了白天观测条件下1 064 nm波长激光精确指向问题。采用重复频率为1 kHz、功率为5 W的1 064 nm激光器,建立了1 064 nm波长白天卫星激光测距试验系统,最远获得了地球同步轨道卫星的有效回波数据,实现了1 064 nm波长白天激光测距。试验研究将为我国1 064 nm在远距离卫星激光测距、空间碎片漫反射激光测距方面的应用与发展奠定了技术基础。
At 1 064 nm, the atmospheric transmittance is high and the sky background radiation is small. The use of this laser to carry out satellite ranging is helpful to improve the observation capability of ranging system, and satellite laser ranging of the 1 064 nm has become one of the important development trends of international laser ranging technology. Based on the filter with a bandwidth of 2.2 nm, the noise of the 1 064 nm ranging system was calculated and tested in the daytime, which verified the suppression effect of this filter on the background noise during the day. With the help of the infrared camera at night, the coincidence between transmitting light path and the mechanical axis was realized based on the circular center method, which ensured the laser pointing accuracy is better than 5 ″ in all-sky area and solved the problem that the laser pointing at 1 064 nm needs real-time monitoring in the daytime. Based on the 1 064 nm laser with a repetition frequency of 1 kHz and a power of 5 W,Shanghai Astronomical Observatory established the 1 064 nm daytime satellite laser ranging experimental system.At the farthest, the effective echo data of geosynchronous orbit satellite was obtained. The experimental study will lay a technical foundation for the application and development of 1 064 nm laser ranging in long-distance satellite and diffuse reflection laser ranging in space debris.
作者
邓华荣
龙明亮
张海峰
吴志波
汤凯
张忠萍
Deng Huarong;Long Mingliang;Zhang Haifeng;Wu Zhibo;Tang Kai;Zhang Zhongping(Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China;Key Laboratory of Space Object and Debris Observation,Chinese Academy of Sciences,Nanjing 210008 China)
出处
《红外与激光工程》
EI
CSCD
北大核心
2020年第10期126-131,共6页
Infrared and Laser Engineering
基金
国家自然科学基金(U1631240,11903066)。
