紫外高光谱探测仪实验室辐照度定标研究

大气与环境光学学报 ›› 2021, Vol. 16 ›› Issue (3): 168-176.

• “高分五号卫星大气数据反演”专辑 • 上一篇下一篇

紫外高光谱探测仪实验室辐照度定标研究

冀春延1;2, 赵敏杰1∗, 周海金1, 司福祺1, 刘建国1

1 中国科学院合肥物质科学研究院安徽光学精密机械研究所, 中国科学院环境光学与技术重点实验室, 安徽合肥 230031 ; 2 中国科学技术大学, 安徽合肥 230036

收稿日期:2020-10-28 修回日期:2021-02-03 出版日期:2021-05-28 发布日期:2021-05-28
通讯作者: E-mail: mjzhao@aiofm.ac.cn E-mail:mjzhao@aiofm.ac.cn
作者简介:冀春延 (1996 - ), 河北张家口人, 硕士研究生, 主要从事星载成像光谱仪定标方面的研究。 E-mail: cyji62@mail.ustc.edu.cn
基金资助:
Supported by National Natural Science Foundation Youth Science Foundation Project (国家自然科学基金青年科学基金项目, 41705016)

Laboratory Irradiance Calibration of Spaceborne Ultraviolet Hyperspectral Atmospheric Spectrometer

JI Chunyan1;2, ZHAO Minjie1∗, ZHOU Haijin1, SI Fuqi1, LIU Jianguo1

1 Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China; 2 University of Science and Technology of China, Hefei 230026, China

Received:2020-10-28 Revised:2021-02-03 Published:2021-05-28 Online:2021-05-28

摘要/Abstract

摘要： 紫外高光谱探测仪在轨运行时通过地球光观测光路和太阳光观测光路获取辐射和光谱信息, 因此在发射前需对载荷进行实验室定标。定标后获取的辐照度定标系数将用于在轨计算获取反演所需的太阳参考谱, 定标精度直接影响仪器在轨探测及数据反演精度, 决定着获取的遥感信息的可靠性。采用直接发散光辐照度定标方法, 搭建二维定标平台对定标光路进行不同角度、距离的标准灯测试, 将三个距离下的实验值借助最小二乘法线性拟合得到辐照度定标系数, 并对系数进行角度等因素的校正。测试结果表明合成不确定度为 3.42%, 符合辐射定标要求, 表明了方法的可行性。

关键词: 辐照度定标, 直接发散光, 最小二乘法, 定标系数, 不确定度

Abstract: When the spaceborne ultraviolet hyperspectral atmospheric composition spectrometer is in orbit, it obtains radiation and spectral information through the light path of the earth light observation as well as the light path of the sunlight observation, so it is necessary to be calibrated in the laboratory before launching. As the irradiance calibration coefficient will be used for obtaining the solar reference spectrum during the on-orbit observation, the calibration accuracy directly affects the instrument′s on-orbit detection and inversion accuracy, and determines the reliability of remote sensing information. The direct diverging light is used in the irradiance calibration method, and a two-dimensional calibration platform is build to carry out a series of tests at different angles and distances on the calibration light path. By using the least squares method to linearly fit the experimental values at three distances, the irradiance calibration coefficient is obtained, and then the influence of the angle and the other factors is corrected. The calibration results show that the combined uncertainty is 3.42%, which meets the requirements of radiation calibration, indicating the feasibility of the method.

Key words: irradiance calibration, direct diverging light, least squares method, calibration coefficient, uncertainty

中图分类号:

O432.2

冀春延, 赵敏杰∗, 周海金, 司福祺, 刘建国. 紫外高光谱探测仪实验室辐照度定标研究[J]. 大气与环境光学学报, 2021, 16(3): 168-176.

JI Chunyan, ZHAO Minjie∗, ZHOU Haijin, SI Fuqi, LIU Jianguo. Laboratory Irradiance Calibration of Spaceborne Ultraviolet Hyperspectral Atmospheric Spectrometer[J]. Journal of Atmospheric and Environmental Optics, 2021, 16(3): 168-176.

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紫外高光谱探测仪实验室辐照度定标研究

Laboratory Irradiance Calibration of Spaceborne Ultraviolet Hyperspectral Atmospheric Spectrometer

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