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中文摘要：
根据线性度分析方法,结合空间调制干涉光谱成像仪的成像原理,建立了线性度测试系统.采用太阳模拟器作为光源,通过减光片得到8个亮度等级的辐射输出,用待测仪器与光谱辐射度计分别对其进行采集,比对得到待测仪器线性度为0.81%,不确定度为2.7%.结果表明：该线性度测试方法精度较高,此方法同样适用于同类干涉光谱成像仪的线性度测试.
英文摘要：
Based on the method of linearity analysis,combined the principle of SMIFTS,a linearity testing system is established. The system consists of a solar simulator and obtained 8 radiance levels with attenuation filter,recorded digital number of SMIFTS and measured the radiance with spectrometer,then obtained the linearity 0.81% and the uncertainty of testing is 2.7%.The result shows that,the method is of high precision and can be used in other Fourier transform spectrometers.
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