近红外多视场白天测星分析

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。

Analysis of star detection with multi-field near-infrared during daytime

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.