摘要
近红外多视场恒星探测系统采用3个探测器同时进行恒星探测,分析了近红外波段白天恒星-背景对比度随探测参数的变化情况,对不同视场对比度进行对比,结果表明:随着探测天顶角的增大,恒星-背景对比度呈线性增大;太阳天顶角大于探测器天顶角以后,恒星-背景对比度随太阳天顶角近似于指数增长;一定高度时,对比度随探测器高度的增加近似指数增加;而随着探测方位角的增大,恒星-背景对比度呈高斯分布;三个视场内同一时刻的背景辐射比在主视场0°探测方位角时达到最小,探测到的恒星-背景对比度随主视场探测方位角变化呈对称分布,为星等修正奠定较好的基础。
Near-infrared star detection system used three detectors to detect stars at the same time, analysed the relation between contrast and the detection parameters of near-infrared band during daytime, what＇s more, compared the contrast of different detectors, the result showed that： with the observer zenith angle increased, the star-background contrast increased linearly; when the solar zenith angle was greater than the observer zenith angle, the contrast similar to the exponential growth; out of a certain height, the contrast exponentially increased with the height increased; with the increased of the detection azimuth, contrast approximation Gaussian distribution; at the same time, background radiation contrast of different fields got minimum when the main field is 0°; star-background contrast nearly symmetrical distribution with the alter of main field＇s detection azimuth, provide a better basis for the magnitude amendment.
出处
《红外与激光工程》
EI
CSCD
北大核心
2013年第8期2202-2208,共7页
Infrared and Laser Engineering
基金
国家863计划(2010AAJ140)
关键词
近红外
多视场
白天
对比度
探测方位角
near-infrared
multi-field
daytime
contrast
detection azimuth
