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地基CE312热红外辐射计用于星载传感器的定标,其定标精度直接影响热红外传感器的场地定标精度。文章论述CE312-1b带宽辐亮度定标法和分谱辐亮度定标法的定标原理,利用实验室黑体对CE312-1b热红外辐射计进行定标,最后利用2010年8月青海湖的野外实测数据结合MODIS观测值,分析对比两种定标方法所得定标结果的准确性及误差来源。结果表明,带宽辐亮度定标法得到的CE312热红外辐射计定标系数相对分谱辐亮度定标法所得结果在准确性、适用性方面表现更好。
The ground-based CE312 thermal infrared radiometer is used to calibrate the spaceborne sensor, and its calibration accuracy directly affects the thermal calibration accuracy of the thermal infrared sensor. This article discusses the calibration principle of CE312-1b bandwidth radiance calibration method and spectrum radiance calibration method, and uses CE312-1b thermal infrared radiometer to calibrate with laboratory blackbody. Finally, using the field of Qinghai Lake in August 2010 The measured data combined with MODIS observations, analysis and comparison of the accuracy of the calibration results obtained by the two calibration methods and sources of error. The results show that the calibration results of the calibration coefficient of the CE312 thermal infrared radiometer obtained by the calibration method of bandwidth radiance are better than those of the spectral radiance calibration method in terms of accuracy and applicability.