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为了满足遥感仪器的高精度辐射定标需求,实现“低温绝对辐射计→多波段滤光片辐亮度计→积分球→遥感器”的辐亮度传递链,对多波段滤光片辐亮度计进行了定标方法的研究。利用可调谐激光导入积分球产生的均匀、稳定、无偏的面光源作为定标光源,使用溯源于低温辐射计的标准辐亮度探测器作为传递标准,通过系统级的定标方法对滤光片辐亮度计的753、865、900、1030nm四个工作波段进行了绝对光谱响应度定标,不确定度优于0.58%。与溯源于法国黑体辐射源的太阳辐射计CIMEL CE318进行了比对实验,结果表明,在四个定标波段,滤光片辐亮度计测得的积分球辐亮度与由CE318测得的辐亮度差值分别为-0.216%、-2.564%、-4.248%和2.226%,验证了该系统级定标方法的合理性。
In order to meet the needs of high-precision radiometric calibration of remote sensing instruments and achieve the radiance transmission chain of “low-temperature absolute radiometer → multi-band filter radiometer → integrating sphere → remote sensor”, the multi-band filter radiance Calculated for the calibration method. A uniform, stable and unbiased surface light source is used as a calibration light source. The standard radiance detector traceable to a pyrometer is used as the transmission standard, and the system calibration method is used to calibrate the filter Radiometric meter 753,865,900,1030 nm four working bands for absolute spectral responsivity calibration, the uncertainty is better than 0.58%. And the solar cell radiometer CIMEL CE318 originating from the blackbody radiation source in France. The results show that the radii of the integrating sphere measured by the filter radiometer and the radiance measured by CE318 The differences were -0.216%, - 2.564%, - 4.248% and 2.226%, respectively, which verified the rationality of this system-level calibration method.