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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 multi-field stellar detection system uses three detectors to detect stars at the same time. The change of stellar-background contrast with the detection parameters in the near infrared is analyzed. The contrast of different fields is compared. The results show that with the detection days The contrast between the star and the background increases linearly when the vertex angle increases, and the contrast between the star and the background increases exponentially with the solar zenith angle when the solar zenith angle is greater than the zenith angle of the detector. With a certain height, the contrast increases with the height of the detector , While the stellar-background contrast is Gaussian distribution with the increase of azimuth of detection. The background radiation at the same time in the three fields of view is the smallest than the azimuth of 0 ° in the main field of view. The stellar-background contrast is symmetrically distributed with the change of the azimuth of the main field detection, which lays a good foundation for the magnitude correction.