摘要
从白天天空背景、恒星光谱特性、星敏感器的构造特点3方面分析白天大气层内小视场轻型星敏感器对恒星探测的可行性。在此基础上,采用光谱滤波、合理选择系统参数等方法,研制了小视场轻型星敏感器,并在高海拔地区进行了白天地面观星实验,理论分析和实验结果表明:小视场轻型星敏感器能够实现白天恒星的探测。在3km海拔高度、大气能见度10km、视场2°×1.5°、太阳规避角30°以外、天空晴朗无云的环境下,可探测星等极限值达到3.8等。
The feasibility of the stellar detection within the atmosphere in daytime by using light star sensor with small field was analyzed from the sky background,the spectral properties of star,and the structure characteristic of star sensor.Using the method of spectral filtering and reasonable choice of system parameters,a light star sensor was developed.Moreover,star detect experiment in daytime was carried out in high altitude area.With the observing altitude of 3km,the atmosphere visibility of 10km and the field of view of 2°×1.5°,the maximum detectable stellar magnitude limit was 3.8when the avoiding angle of the sun was out of 30°. The theory analysis and experiment result both indicate that light star sensor with small field can detect star in daytime.
出处
《应用光学》
CAS
CSCD
北大核心
2014年第2期226-229,共4页
Journal of Applied Optics
关键词
白天观星
星敏感器
天空背景
光谱滤波
信噪比
stellar measurement in daytime
star sensor
sky background
spectral filtering
signal to noise ratio
