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基于比值法的地表反射率测量系统研究

Research on surface reflectivity measurement system based on ratio method

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摘要

为了实现地表反射率长期自动化观测,提高场地定标频次, 提出了一种基于比值辐射测量的地表反射率测量方法。利用场地反射率监测辐射仪和野外光谱辐照度仪进行同步观测, 获取同一时间的地表辐亮度和大气总照度,通过比值法即可直接获得地表反射率参数。设计了基于标准辐射源的实验室辐射定标, 分别获取辐射计和照度仪的定标系数,进而获得基于比值法测量地表反射率的输入系统参数。在室外开展了标准板测量比对实验, 在可见-近红外波段比值辐射测量结果与实验室定标后参考板方向反射率数值的相对偏差在3%以内,验证了该测量系统的有效性。

Abstract

In order to realize long-term automatic observation of surface reflectivity and improve the frequency of site calibration, a method of surface reflectivity measurement based on ratiometric radiation measurement is proposed. Synchronous observation is carried out by using spectally-reflective automatic spectroradiometer and hyperspectral irradiance meter. Surface radiance and total atmospheric illuminance at the same time are obtained, and the surface reflectance parameters can be obtained by the ratio method. The laboratory radiation calibration based on standard radiation source is designed to obtain the calibration coefficients of the radiometer and illuminometer respectively, and then the input system parameters based on the ratio method to measure the surface reflectivity are obtained. The standard board measurement comparison experiment is carried out outdoors. The relative deviation between the visible-near-infrared ratio radiation measurement and the reference plate reflectance value after laboratory calibration is within 3%, and the effectiveness of the measurement system is verified.

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中图分类号:P79

DOI:10.3969/j.issn.1007-5461. 2019.05.017

所属栏目:激光应用

基金项目:Supported by Youth Project of National Natural Science Foundation of China (国家自然科学基金青年项目, 41705013), United Foundation of Chinese Academy of Sciences(中国科学院联合基金, 6141A01011602)

收稿日期:2019-03-06

修改稿日期:2019-04-19

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侯志宽:中国科学院安徽光学精密机械研究所,中国科学院通用光学定标与表征技术重点 实验室, 安徽 合肥 230031中国科学技术大学, 安徽 合肥 230026
张艳娜:中国科学院安徽光学精密机械研究所,中国科学院通用光学定标与表征技术重点 实验室, 安徽 合肥 230031
李 新:中国科学院安徽光学精密机械研究所,中国科学院通用光学定标与表征技术重点 实验室, 安徽 合肥 230031
刘恩超:中国科学院安徽光学精密机械研究所,中国科学院通用光学定标与表征技术重点 实验室, 安徽 合肥 230031
张 权:中国科学院安徽光学精密机械研究所,中国科学院通用光学定标与表征技术重点 实验室, 安徽 合肥 230031
徐海东:中国科学院安徽光学精密机械研究所,中国科学院通用光学定标与表征技术重点 实验室, 安徽 合肥 230031中国科学技术大学, 安徽 合肥 230026
郑小兵:中国科学院安徽光学精密机械研究所,中国科学院通用光学定标与表征技术重点 实验室, 安徽 合肥 230031

联系人作者:侯志宽(hoo@mail.ustc.edu.cn)

备注:侯志宽 (1992-), 山东枣庄人,研究生,主要从事光电仪器技术和光学辐射定标方面的研究。

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引用该论文

HOUZhikuan,ZHANG Yanna,LI Xin,LIU Enchao,ZHANGQuan,XU Haidong,ZHENG Xiaobing. Research on surface reflectivity measurement system based on ratio method[J]. Chinese Journal of Quantum Electronics, 2019, 36(5): 620-626

侯志宽,张艳娜,李 新,刘恩超,张 权,徐海东,郑小兵. 基于比值法的地表反射率测量系统研究[J]. 量子电子学报, 2019, 36(5): 620-626

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