太阳辐射计系统级实验室定标方法研究

Sun photometer is one of the basic instruments for atmospheric observation. Its traditional Langley calibration method has few calibration conditions that can be used in China. A project that researches calibration methods for sun photometer of system-level laboratories will be carried out to achieve a full-spectrum high-precision calibration target for sun photometers in the laboratory, and solve the problem of large uncertainty of Sun photometer using Langley cross calibration. Using a tunable laser to introduce light into an integrating sphere as the calibration light source, research standards transfer calibration technology, integrating sphere decoherence-free technology, alternative calibration technology, laser lattice scan technology, and distance precision measurement technology to achieve spectrum subdivision scan calibration for the Sun photometer in the laboratory environment, and obtain the full-spectrum fine irradiance response function and irradiance calibration coefficient V0 value of the sun photometer. The radiation calibration uncertainty was expected to be better than 1%, and the calibration result was verified by the Sun photometer which has been calibrated by Langley. The results of the project will directly support the increase in the quantitative application level of atmospheric aerosol observation and on-orbit calibration of satellites, and provide a solid technical foundation for the future sky-earth integration of China's new calibration business system.

太阳辐射计是大气观测基本仪器之一，其传统的Langley定标方法在国内鲜有能使用的定标条件。项目将开展太阳辐射计系统级实验室定标方法研究，实现太阳辐射计在实验室内全谱段高精度的定标目标，解决太阳辐射计在国内使用Langley交叉定标不确定度大的难题。采用可调谐激光器导入积分球作为定标光源，通过研究标准传递定标技术、积分球消相干技术、替代定标技术、激光点阵扫描技术和距离精确测量技术，在实验室环境下实现对太阳辐射计光谱细分扫描定标，获得太阳辐射计全谱段精细辐照度响应函数和照度定标系数V0值，预计辐射定标不确定度优于1%，定标结果经过Langley定标过的太阳辐射计进行验证。项目结果将直接支持大气气溶胶观测及卫星在轨场地定标的定量化应用水平提升，为未来我国天地一体化的新型定标业务系统提供坚实的技术基础。

太阳辐射计是大气观测基本仪器之一，其传统的Langley定标方法在国内鲜有能使用的定标条件。项目通过对太阳辐射计系统级实验室定标方法进行研究，实现太阳辐射计在实验室内全谱段高精度的定标目标，解决太阳辐射计在国内使用Langley交叉定标不确定度大的难题。采用可调谐激光器导入积分球作为定标光源，通过研究标准传递定标技术、积分球消相干技术、替代定标技术、激光点阵扫描技术和距离精确测量技术，在实验室环境下实现对太阳辐射计光谱细分扫描定标，获得太阳辐射计全谱段精细辐照度响应函数和照度定标系数V0值，辐射定标不确定度优于1%，定标结果经过Langley定标过的太阳辐射计进行验证。项目结果对大气气溶胶观测及卫星在轨场地定标的定量化应用水平的提升提供了直接支持，为未来我国天地一体化的新型定标业务系统提供坚实的技术基础。