热带地理2011，Vol.31Issue(2)：182-186,5.
基于ASD地物光谱仪的两种天空光测量方法比较分析
Comparative Analysis of the Two Common Methods for Skylight Measurement Based on the ASD Spectroradiometer
摘要
Abstract
The information of skylight can be retrieved through measuring the radiance of spectralon in the shadow indirectly or measuring sky of different angle or azimuth directly. The measuring experiment was carried out in Guangzhou on Nov. 5, 2009 to study the difference and relationship between the two ways, in which ASD FieldSpec3 was used to measure the radiance of spectralon in the shadow, and then immediately to measure the skylight at different orientation and 7 observing zenith angles (0°, 15°, 30°, 45°, 60°, 80°, 83°) at vertical sun principal planes. Gray relational grades between the measured data were calculated and compared, and the results showed that gray relational grade varied from 0.789 to 0.914 with the change of observing zenith angle or azimuth. The merits and demerits of the two measuring ways were analyzed, and the authors come to the conclusion that: (1) the skylight from hemisphere can be measured by spectralon. This method can be applied to retrieve sky diffuse irradiance and compositive atmospheric information. (2) the direct measurement can gain the skylight values of the particular observing zenith angle and observing azimuth, it is suitable for studying hemisphere distribution of atmospheric component, removing skylight reflectance on the surface of water, correcting for multiangle remote sensing, etc.关键词
天空光/测量方法/ASD地物光谱仪Key words
skylight/ measurement method/ the ASD Spectroradiometer分类
数理科学引用本文复制引用
陈蕾,秦雁,邓孺孺,何颖清,陈启东,朱家敏,汪伟..基于ASD地物光谱仪的两种天空光测量方法比较分析[J].热带地理,2011,31(2):182-186,5.基金项目
国家自然科学基金项目"珠江三角洲大气SO2和NOx衍生气溶胶遥感特征及其反演模型"(40671144) （40671144）
