1064 nm波段白天背景噪声分析及应用研究

卫星激光测距(SLR)是目前卫星单点距离测量精度最高的技术,已成为高精度测量领域不可或缺的手段。国际上大多数SLR台站采用532 nm的工作波长,在白天测距中存在天空背景噪声大、有效回波识别困难等问题,影响了台站的白天测距数据产出。鉴于白天1064 nm 波段天空背景亮度低,理论上对比分析计算了1064 nm波段与532 nm波段的系统噪声强度。并在晴好白天开展了1064 nm波段的噪声测量,并与532 nm波段的测距系统噪声进行了比较,数据结果与理论分析基本一致。在此基础上,开展了晨昏时段的1064 nm卫星激光测距实验,并获得了多圈次卫星的有效回波数据,为1064 nm的白天卫星激光测距打下了技术基础。

Daytime background noise analysis and application research in 1064 nm band

Satellite laser ranging(SLR)is the most accurate technique for single-point distance measurement of satellites,and has become an indispensable means in the field of high-precision measurement.Most SLR stations in the world use the working wavelength of 532 nm.In the daytime ranging,there are problems such as large background noise and difficult echo recognition,which affects the daytime ranging data output of the station.Considering the low background brightness of the 1064 nm band during the day,the paper theoretically calculated the background noise intensity of the 1064 nm band and the 532 nm band respectively.The actual measurement of the background noise of the two bands was performed during the sunny day,which is basically consistent with the theoretical analysis.On this basis,the 1064 nm satellite laser ranging experiment in the morning faint period was carried out,and the effective echo data of multi-passes satellites were obtained,which laid a good technical foundation for daytime satellite laser ranging based on 1064 nm in the future.