基于多灰阶靶标的在轨辐射定标方法研究.pdf

文档介绍：第卷第期光学学报
32 2 ,
年月
2012 2 ACTA OPTICA SINICA February,2012
基于多灰阶靶标的在轨辐射定标方法研究
徐伟伟张黎明杨本永乔延利

(中国科学院安徽光学精密机械研究所,通用光学定标与表征技术重点实验室,安徽合肥 230031)
摘要辐射定标是光学遥感信息定量化的关键技术之一随着高分辨光学遥感器定量化应用的发展在轨绝对辐
。,
射定标精度的要求也越来越高。提出了一种基于多灰阶靶标的在轨定标方法,采用实际测量的漫射辐照度与总辐
照度比来代替辐射传输计算的气溶胶散射,同时布设高反射率靶标以提高辐射定标精度。初步试验结果表明,基
于多灰阶靶标的高分辨率光学卫星传感器在轨绝对辐射定标方法,对假定的理论模型依赖较少,能够实现全动态
范围的高精度定标,不确定度优于4%,而且满足复杂环境条件的应用要求。
关键词遥感多灰阶靶标辐射定标漫射辐照度与总辐照度比高分辨遥感器
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中图分类号文献标识码
TP79; A doi: .0212007
On-Orbit Radiometric Calibration Based on Gray-Scale Tarps
Xu Weiwei Zhang Liming Yang Benyong Qiao Yanli
(Key Laboratory of Optical Calibration and Characterization,Anhui Institute of Optics and Fine Mechanics,
Chinese Academy of Sciences,Hefei,Anhui 230031,China)
Abstract Radiometric calibration in-flight is one of critical techniques for information quantification of optical
remote the development of quantitative application of high spatial resolution satellite optical sensors,
required precision on absolute radiometric calibration is asked higher and calibration method based on gray-
scale tarps is measured ratio of diffusion to global irradiance substitutes the aerosol puted
by radiance transfer high reflectance tarps are deployed to improve the accuracy of on-orbit radiometric