CBERS-2 CCD相机绝对辐射定标系数验证与评价

Validation and Assessment of CBERS-2 CCD Camera's Absolute Radiometric Calibration Coefficients

卫星遥感器绝对辐射定标系数的有效性检验,是对卫星遥感精度进行全面评价的最有效手段之一。利用绝对辐射定标系数反演反射率值与实测值对比的方法,对CBERS-2 CCD相机绝对辐射定标结果进行了有效性检验与误差分析,根据分析结果对CCD相机4个波段的绝对辐射定标系数作出了客观的评价。验证表明,两点法获得的CCD相机定标系数可靠,定标效果较好,而单点法获得的定标系数对CCD相机不适用。

It＇s one of the most available means of general satellite remote validate the absolute calibration coefficients of the satellite-based sensor sensing accuracy assessment to Comparing the retrieval values of reflectance to the ground-based measured data, the validation and error analysis of absolute radiometric calibration data of CBERS-2 CCD camera are discussed. According to the analysis, absolute radiometric coefficients of the four bands of CCD camera are evaluated objectively. Results show that the coefficients obtained from double point calibration method are more effective and reliable, and the coefficients obtained from single point calibration method are not applicable to CCD camera.