依据我国气溶胶光学特性监测网(CARSNET)辐射定标方法和流程,分析了太阳辐射计实验室辐射定标技术需求与特点。为完善目前CARSNET所采用辐射定标方法中太阳辐射计天空散射辐射通道短波段定标和提高太阳辐射计气溶胶反演精度,研制了应用于太阳辐射计的LED光谱可调积分球参考光源。测试结果表明该参考光源在出光口中心20 mm区域内的面均匀性优于99.9%,±2°小角度范围内角度均匀性优于99.9%,其输出2 h内的稳定性优于99.8%,满足太阳辐射计天空散射辐射通道短波段定标要求。 According to the method and process of CARSNET radiation calibration in China, the requirements and characteristics of solar radiometer calibration in laboratory are analyzed. In order to improve the calibration of the short wavelength band of the solar radiation meter in the radiation calibration method used by CARSNET and to improve the accuracy of the aerosol retrieval of the pyrheliometer, a reference light source of LED spectral adjustable integrating sphere applied to the solar radiation meter was developed. The test results show that the surface uniformity of the reference light source is better than 99.9% within 20 mm from the center of the light exit, the angle uniformity within the small angle of ± 2 ° is better than 99.9% and the stability within 2 h of output is better than 99.8% , To meet the solar radiometer sky scattering radiation channel short band calibration requirements.