摘要
地球同步轨道空间相机的观测视场受到杂散光的严重影响,因此需要对其进行定量化分析。针对该相机的可见光通道,对地球反照杂散光进行了研究。采用等效面源积分法计算了可见光通道观测6.5等星时的信杂比,并将其与实验室及在轨实测数据进行了对比(平均误差小于15%)。结果表明,仿真计算的精度较高。
The observation field of view of space camera in geosynchronous orbit is seriously affected by stray light, so it needs to be quantitatively analyzed. Aiming at the visible channel of the camera, the earth-reflected stray light is studied. The equivalent surface-source integration method is used to calculate the signal-to-noise ratio when observing the 6.5-magnitude star in the visible channel, and the calculation result is compared with the laboratory and on-orbit test data(the average error is less than 15%). The results show that the accuracy of the simulation calculation is high.
作者
陆强
LU Qiang(Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Shanghai 200083,China;Key Laboratory of Infrared System Detection and Imaging Technology,Chinese Academy of Sciencss,Shanghai 200083,China)
出处
《红外》
CAS
2019年第11期1-6,48,共7页
Infrared
关键词
杂散光
在轨测试
点源透过率
地球反照
信杂比
stray light
on-orbit test
point source transmittance
earth albedo
signal-to-noise ratio
