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模拟空间环境辐射定标技术主要用于卫星发射前对其所携带的多光谱扫描仪的响应特性进行辐射定标,为用户提供定标曲线。介绍了利用多个光源、多套定标光学系统的多光谱扫描仪辐射定标技术。多谱段光源系统由太阳辐照积分球和黑体组成,积分球用于可见光、近红外谱段的辐射定标,黑体用于远红外谱段的辐射定标。多谱段定标光学系统通过在真空低温环境下的精密传动机构切换反射镜位置,以离轴抛物面反射镜为中心形成两套光学系统,分别将积分球、黑体的辐射反射到扫描仪的入口,从而一次试验即可完成卫星多光谱扫描仪全谱段的辐射定标。
Radiation calibration of simulated space environment technology is mainly used for radiation calibration of the response characteristics of the multispectral scanner carried by the satellite before it is launched so as to provide users with calibration curves. A multi-spectral scanner radiation calibration technology using multiple light sources and multiple calibration optical systems is introduced. The multi-spectral light source system is composed of solar radiation integrating sphere and blackbody. The integrating sphere is used for the radiation calibration of the visible light and near-infrared spectrum, and the blackbody is used for the radiation calibration of the far infrared spectrum. The multi-spectral calibration optical system switches the position of the mirror by a precision transmission mechanism in a vacuum and low temperature environment. Two optical systems are formed around the off-axis parabolic mirror, and the radiation of the integrating sphere and the black body is reflected to the entrance of the scanner respectively A test to complete the satellite multi-spectral scanner full spectrum of radiation calibration.