太阳高度角对图像能量的影响及其校正

大气与环境光学学报 ›› 2013, Vol. 8 ›› Issue (1): 11-17.

太阳高度角对图像能量的影响及其校正

栗琳1,2, 胡勇1, 巩彩兰1, 祝令亚3, 赫华颖3

(1 中国科学院上海技术物理研究所, 上海 200083;
2 中国科学院研究生院, 北京 100049;
3 中国资源卫星应用中心, 北京 100094)

出版日期:2013-01-28 发布日期:2013-01-07
通讯作者: 栗琳（1985-），女，吉林省吉林市人，博士研究生，主要从事高光谱成像仪定标及图像处理研究。 E-mail:lilin_85@126.com
作者简介:栗琳（1985-），女，吉林省吉林市人，博士研究生，主要从事高光谱成像仪定标及图像处理研究。
基金资助:
民用航天“十二五”预先研究项目（D040103）、高分专项（民用部分）基础关键技术项目（项目号 A0106/1112/JC01）资助

Solar Elevation Angle's Effect on Image Energy and Its Correction

LI Lin1,2, HU Yong1, GONG Cai-lan1, ZHU Ling-ya3, HE Hua-ying3

(1 Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 China Centre for Resources Satellite Data and Application, Beijing 100094, China)

Published:2013-01-28 Online:2013-01-07

摘要/Abstract

摘要：

在研究以太阳光为主的可见光波段的大气辐射传输过程中，成像时遥感器位置的变化导致了太阳高度角有所变化，从而使图像接收的能量有所不同。阐明了太阳高度角的基本概念并利用辐射传输模型Modtran5定量分析了不同太阳高度角对遥感器入瞳处能量的差别，在总结其他学者研究天顶角校正的基础上通过数值模拟的方法建立不同天顶角时刻的辐射能量同0°天顶角的辐射能量的关系模型，从而实现校正。校正后的入瞳处辐亮度同原0°天顶角辐亮度对比，结果相对误差小于1%，校正结果较为理想。

关键词: 太阳高度角/方位角, 大气辐射传输模型, 校正效果

Abstract:

In the process of atmospheric radiative transmission in the visible light band, the measured value of sun angle changed along with the remote sensor’s position, and the images received different energy. The basic concepts of solar elevation angle are illustrated and radiative transfer mode code Motran5 is used to quantitatively analyze the difference of energy with various solar elevation angle. By summarizing the method of solar elevation angle correction of other scholars, a model of radiance between different solar elevation angle and 0° sun elevation angle is built by numerical simulation method, a correction method is put forward by means of the model. A comparison between correction and 0° radiance is carried out, relative error of less than 1% shows that the correction is desirable.

Key words: solar elevation angle/ solar zenith angle, atmospheric radiative transfer mode, correction result

中图分类号:

P422

栗琳胡勇巩彩兰祝令亚赫华颖. 太阳高度角对图像能量的影响及其校正[J]. 大气与环境光学学报, 2013, 8(1): 11-17.

LI Lin, HU Yong, GONG Cai-Lan, ZHU Ling-Ya, HE Hua-Ying. Solar Elevation Angle's Effect on Image Energy and Its Correction[J]. Journal of Atmospheric and Environmental Optics, 2013, 8(1): 11-17.

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