空间紫外遥感光谱辐射计光谱辐亮度定标三种方法的比较

应用基于spectralon平面漫反射板和两种基于积分球的辐亮度共三种定标方法,标定了空间紫外遥感光谱辐射计的辐亮度响应度。初步尝试分析了每种方法的相对不确定度,指出漫反射板双向反射分布函数(BRDF)的测量不确定度和平面漫反射板亮度的计算不确定度是这三种定标方法比对中不一致的主要原因。定标数据比对显示,使用这三种定标方法得到的光谱辐射计辐亮度响应度在各自给定的相对不确定度范围以内(约3%)相符合。

Comparison of Spectral Radiance Calibrations of Spectroradiometer for Ultraviolet Space Remote Sensing Using Three Calibration Techniques

Three techniques of spectral radiance calibration,one based on the flat diffuser and the other two based on internally illuminated integrating sphere,are applied.The radiance responsivities of the spectroradiometer under development for ultraviolet remote sensing in space have been obtained using these three calibration techniques.A preliminary analysis of uncertainties of these techniques points out that the uncertainties in measurements of the diffuser bidirectional reflectance distribution on function(BRDF) and the calculation of the radiance of the flat diffuser are the major sources for the discrepancy among the comparisons of these three techniques.The comparisons of calibration data show that radiance responsivities of the spectroradiometer derived using these three techniques are consistent within the uncertainties (3%) designated to them,respectively.