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成像光谱仪辐射定标影响量的测量链与不确定度
引用本文:李幼平,禹秉熙,王玉鹏,方伟.成像光谱仪辐射定标影响量的测量链与不确定度[J].光学精密工程,2006,14(5):822-828.
作者姓名:李幼平  禹秉熙  王玉鹏  方伟
作者单位:1. 北京市地理信息研究所,北京100011;中国科学院研究生院,北京,100039
2. 中国科学院,长春光学精密机械与物理研究所,应用光学国家重点实验室,吉林,长春,130033
3. 中国科学院,长春光学精密机械与物理研究所,应用光学国家重点实验室,吉林,长春,130033;中国科学院研究生院,北京,100039
摘    要:分析了成像光谱仪遥感观测数据中包含的地物光谱特征、仪器参数和大气传输特性等的信息结构。研究了成像光谱仪辐射定标的物理过程和测量链,应用1993年国际标准化组织(ISO)颁布的《测量不确定度表示指南》,分析了辐射定标11项影响量的测量不确定度和合成标准不确定度。遥感辐射定标的绝对精度就是不确定度。辐射定标需要辐射标准、积分球光源、光谱辐射计以及遥感器上设置星上定标装置等专用设备和技术,并经过多级测量链的测试过程才能完成。光谱辐照度标准的不确定度在3%~5%,辐射定标中其它影响量的测量不确定度限制在1%~2%,成像光谱仪辐射定标的绝对精度才能达到5%~8%,这需要相当好的仪器设备和光辐射测试技术。

关 键 词:光学计量与测量  辐射定标  不确定度  精度  成像光谱仪
文章编号:1004-924X(2006)05-0822-07
收稿时间:2006-02-22
修稿时间:2006-07-18

Measurement chain of influence quantities and uncertainty of radiometric calibration for imaging spectrometer
LI You-ping,YU Bing-xi,WANG Yu-peng,FANG Wei.Measurement chain of influence quantities and uncertainty of radiometric calibration for imaging spectrometer[J].Optics and Precision Engineering,2006,14(5):822-828.
Authors:LI You-ping  YU Bing-xi  WANG Yu-peng  FANG Wei
Affiliation:1. Beijing Institute of Geography Information, Beijing 100011 ,China 2. State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Science, Changchun, 130031 China 3. Graduate School of the Chinese Academy of Science, Beijing, 100039 China
Abstract:This paper analyses the information configuration in remote sensing observation data of imaging spectrometer,including the spectral character of ground surface, instrument parameter and atmosphere transmission and also discusses on the physical process and measurement chain of radiometric calibration of imaging spectrometer.Then according to the international updated method of ISO1993(E)' Express Guide of Measurement Uncertainty,the measurement uncertainty and combined standard uncertainty of eleven influence quantities of radiometric calibration are analyzed by the special equipment such as radiation standard,light source of integral sphere,spectroradiometer and in-flight calibration sets and so on.To accomplish the radiometric calibration,the measurement process of multi-measurement chain is set up.Experimental results show that the radiometric calibration of the imaging spectrometer requires special advanced equipment and technique.To reach the absolute accuracy of 5%~8%,the uncertainty of standard spectral irradiance must be 3%~5% and the measurement uncertainty of the other influence quantity items must be limited within 1%~2%.
Keywords:optical metrology and measurement radiometric calibration uncertainty precision imaging spectrometer
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