| Author Name | Affiliation | | Xiaolong Yi | Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
University of Chinese Academy of Sciences, Beijing 100049, China | | Wei Fang | Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China | | Yang Luo | Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China | | Zhiwei Xia | Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China |
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| Abstract: |
| Since the calibration accuracy decreases with the reduction of irradiance power, the nonlinearity of sensitivity is experimentally investigated and corrected in order to improve the precision of calibration for Solar Irradiance Absolute Radiometer (SIAR). The optimization method is proposed based on the interpolation approximation principle. The real-time correction sensitivities are repeatedly measured at each radiant power. The relative system error of sensitivity nonlinearity is 2.2%. The impact of sensitivity nonlinearity is analyzed. The radiant powers are measured by the optimization method and the traditional method. The comparison experiment results illustrate that the optimization method improves the measure accuracy to 0.1%. The sensitivity nonlinearity is compensated by the real-time correction. Thus, the optimization method significantly improves the calibration precision of ground-based comparison experiment. The investigation of sensitivity nonlinearity also provides the theoretical and experimental basis for optimizing the on-orbit calibration precision of Total Solar Irradiance Monitor (TSIM). |
| Key words: measure precision absolute radiometer radiant calibration solar irradiance |
| DOI：10.11916/j.issn.1005-9113.15315 |
| Clc Number:TP73 |
| Fund: |
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| Descriptions in Chinese: |
| 太阳辐照度绝对辐射计的灵敏度研究与优化 衣小龙1，2，方伟1，骆杨1，夏志伟1，王玉鹏1 （1. 中国科学院 长春光学精密机械与物理研究所，长春 130033; 2. 中国科学院大学，北京100049） 创新点说明：1）通过理论分析以及实验测量的手段，研究灵敏度非线性误差对太阳辐照度绝对辐射计测量精度的影响； 2）提出了太阳辐照度绝对辐射计的测量新方法，通过实时修正灵敏度补偿了灵敏度的非线性误差，从而提高测量精度。 研究目的： 目前太阳辐照度绝对辐射计的定标精度随光功率的降低而下降，本文主要研究目的是提高太阳辐照度绝对辐射计的测量精度，从而提高定标精度。 研究方法： 通过理论分析以及实验测量的路线研究灵敏度非线性，通过修正灵敏度误差提高太阳辐照度绝对辐射计的测量精度。基于两点插值原理提出优化的测量方法。在各个辐射功率下测量实时修正灵敏度，得到灵敏度非线性的相对系统误差为2.2%，分析灵敏度非线性的影响。同时使用新方法以及传统方法测量辐射功率。 结果： 比对实验结果说明新方法将测量精度提高到0.1%，通过实时修正补偿了灵敏度非线性。 结论： 1）新方法可以显著提高地面比对实验的定标精度； 2）灵敏度非线性研究为优化太阳总辐照度监测仪的在轨定标精度提供了理论和实验依据。 关键词：测量精度；绝对辐射计；辐射定标；太阳辐照度 |
